library

Prolog files

aggregate.pl  -- Aggregation operators on backtrackable predicates
aggregate/3	Aggregate bindings in Goal according to Template.
aggregate/4	Aggregate bindings in Goal according to Template.
aggregate_all/3	Aggregate bindings in Goal according to Template.
aggregate_all/4	Aggregate bindings in Goal according to Template.
foreach/2	True when the conjunction of instances of Goal created from solutions for Generator is true.
free_variables/4	Find free variables in bagof/setof template.
safe_meta/2	Declare the aggregate meta-calls safe.
ansi_term.pl  -- Print decorated text to ANSI consoles
ansi_format/3	Format text with ANSI attributes.
ansi_get_color/2	Obtain the RGB color for an ANSI color parameter.
console_color/2	Hook that allows for mapping abstract terms to concrete ANSI attributes.
message_line_element/2	Hook implementation that deals with ansi(+Attr, +Fmt, +Args) in message specifications.
apply.pl  -- Apply predicates on a list
convlist/3	Similar to maplist/3, but elements for which call(Goal, ElemIn, _) fails are omitted from ListOut.
exclude/3	Filter elements for which Goal fails.
foldl/4	Fold an ensemble of m (0 <= m <= 4) lists of length n head-to-tail ("fold-left"), using columns of m list elements as arguments for Goal.
foldl/5	Fold an ensemble of m (0 <= m <= 4) lists of length n head-to-tail ("fold-left"), using columns of m list elements as arguments for Goal.
foldl/6	Fold an ensemble of m (0 <= m <= 4) lists of length n head-to-tail ("fold-left"), using columns of m list elements as arguments for Goal.
foldl/7	Fold an ensemble of m (0 <= m <= 4) lists of length n head-to-tail ("fold-left"), using columns of m list elements as arguments for Goal.
include/3	Filter elements for which Goal succeeds.
maplist/2	True if Goal is successfully applied on all matching elements of the list.
maplist/3	True if Goal is successfully applied on all matching elements of the list.
maplist/4	True if Goal is successfully applied on all matching elements of the list.
maplist/5	True if Goal is successfully applied on all matching elements of the list.
partition/4	Filter elements of List according to Pred.
partition/5	Filter List according to Pred in three sets.
scanl/4	Scan an ensemble of m (0 <= m <= 4) lists of length n head-to-tail ("scan-left"), using columns of m list elements as arguments for Goal.
scanl/5	Scan an ensemble of m (0 <= m <= 4) lists of length n head-to-tail ("scan-left"), using columns of m list elements as arguments for Goal.
scanl/6	Scan an ensemble of m (0 <= m <= 4) lists of length n head-to-tail ("scan-left"), using columns of m list elements as arguments for Goal.
scanl/7	Scan an ensemble of m (0 <= m <= 4) lists of length n head-to-tail ("scan-left"), using columns of m list elements as arguments for Goal.
apply_macros.pl  -- Goal expansion rules to avoid meta-calling
archive.pl  -- Access several archive formats
archive_close/1	Close the archive.
archive_create/3	Convenience predicate to create an archive in OutputFile with data from a list of InputFiles and the given Options.
archive_data_stream/3	True when DataStream is a stream to a data object inside Archive.
archive_entries/2	True when Paths is a list of pathnames appearing in Archive.
archive_extract/3	Extract files from the given archive into Dir.
archive_foldl/4	Operates like foldl/4 but for the entries in the archive.
archive_header_property/2	True when Property is a property of the current header.
archive_next_header/2	Forward to the next entry of the archive for which Name unifies with the pathname of the entry.
archive_open/3	Wrapper around archive_open/4 that opens the archive in read mode.
archive_open/4	Open the archive in Data and unify Archive with a handle to the opened archive.
archive_open_entry/2	Open the current entry as a stream.
archive_property/2	True when Property is a property of the archive Handle.
archive_set_header_property/2	Set Property of the current header.
arithmetic.pl  -- Extensible arithmetic
arithmetic_expression_value/2	True when Result unifies with the arithmetic result of evaluating Expression.
arithmetic_function/1	Declare a predicate as an arithmetic function.
assoc.pl  -- Binary associations
assoc_to_keys/2	True if Keys is the list of keys in Assoc.
assoc_to_list/2	Translate Assoc to a list Pairs of Key-Value pairs.
assoc_to_values/2	True if Values is the list of values in Assoc.
del_assoc/4	True if Key-Value is in Assoc0.
del_max_assoc/4	True if Key-Value is in Assoc0 and Key is the greatest key.
del_min_assoc/4	True if Key-Value is in Assoc0 and Key is the smallest key.
empty_assoc/1	Is true if Assoc is the empty association list.
gen_assoc/3	True if Key-Value is an association in Assoc.
get_assoc/3	True if Key-Value is an association in Assoc.
get_assoc/5	True if Key-Val0 is in Assoc0 and Key-Val is in Assoc.
is_assoc/1	True if Assoc is an association list.
list_to_assoc/2	Create an association from a list Pairs of Key-Value pairs.
map_assoc/2	True if Pred(Value) is true for all values in Assoc.
map_assoc/3	Map corresponding values.
max_assoc/3	True if Key-Value is in Assoc and Key is the largest key.
min_assoc/3	True if Key-Value is in assoc and Key is the smallest key.
ord_list_to_assoc/2	Assoc is created from an ordered list Pairs of Key-Value pairs.
put_assoc/4	Assoc is Assoc0, except that Key is associated with Value.
atom.pl  -- Operations on atoms
identifier_parts/2	Parts is a list of atoms that make up Identifier.
join_identifier_parts/3	Join parts of an identifier according to Style.
restyle_identifier/3	Restyle an identifier by extracting the alnum substrings and joining them together according to Style.
backcomp.pl  -- Backward compatibility
$apropos_match/2	True if Needle is a sub atom of Haystack.
$arch/2
$argv/1
$declare_module/3	Used in triple20 particle library.
$home/1
$module/2
$set_prompt/1	Set the prompt for the toplevel.
$strip_module/3	This used to be an internal predicate.
$version/1
C/3	Used to be generated by DCG.
at_initialization/1	Register goal only to be run if a saved state is restored.
checklist/2
concat/3
concat_atom/2	Concatenate a list of atomic values to an atom.
concat_atom/3	Concatenate a list of atomic values to an atom, inserting Separator between each consecutive elements.
convert_time/2	Convert a time-stamp as obtained though get_time/1 into a textual representation using the C-library function ctime().
convert_time/8	Convert a time stamp, provided by get_time/1, time_file/2, etc.
current_module/2	True if Module is a module loaded from File.
current_mutex/3
current_thread/2
displayq/1	Write term ignoring operators and quote atoms.
displayq/2	Write term ignoring operators and quote atoms.
eval_license/0
export_list/2	Module exports the predicates of List.
feature/2	Control Prolog flags.
flush/0
free_variables/2	Return a list of unbound variables in Term.
hash/1	Demands PredInd to be indexed using a hash-table.
hash_term/2	If Term is ground, Hash is unified to an integer representing a hash for Term.
index/1	Prepare the predicate indicated by Head for multi-argument indexing.
lock_predicate/2
merge/3	Merge the ordered sets List1 and List2 into a new ordered list.
merge_set/3	Merge the ordered sets Set1 and Set2 into a new ordered set without duplicates.
message_queue_size/2	True if Queue holds Size terms.
proper_list/1	Old SWI-Prolog predicate to check for a list that really ends in a [].
read_clause/1
read_clause/2
read_history/6
read_pending_input/3
read_variables/2
read_variables/3
set_base_module/1	Set the default module from which we inherit.
set_feature/2	Control Prolog flags.
setup_and_call_cleanup/3	Call Cleanup once after Goal is finished.
setup_and_call_cleanup/4	Call Cleanup once after Goal is finished, with Catcher unified to the reason.
sformat/2
sformat/3
string_to_atom/2	Bi-directional conversion between string and atom.
string_to_list/2	Bi-directional conversion between a string and a list of character codes.
sublist/3	Succeeds if List2 unifies with a list holding those terms for which call(Goal, Elem) succeeds.
substring/4	Predecessor of sub_string using 1-based Offset.
sumlist/2	True when Sum is the list of all numbers in List.
thread_at_exit/1	Register Goal to be called when the calling thread exits.
trie_insert_new/3
unlock_predicate/2
write_ln/1
base32.pl  -- Base32 encoding and decoding
base32/2	Translates between plaintext and base32 encoded atom or string.
base32/3	Encode/decode list of character codes using base32.
base64.pl  -- Base64 encoding and decoding
base64/2	Translates between plaintext and base64 encoded atom or string.
base64/3	Encode/decode list of character codes using base64.
base64_encoded/3	General the base64 encoding and decoding.
base64_encoded/4
base64url/2	Translates between plaintext and base64url encoded atom or string.
base64url/3	Encode/decode list of character codes using Base64URL.
bdb.pl  -- Berkeley DB interface
bdb_close/1	Close BerkeleyDB database indicated by DB.
bdb_close_environment/1	Close a database environment that was explicitly created using bdb_init/2.
bdb_closeall/0	Close all currently open databases and environments.
bdb_current/1	True when DB is a handle to a currently open database.
bdb_current_environment/1	True when Environment is a currently known environment.
bdb_del/3	Delete the first matching key-value pair from the database.
bdb_delall/3	Delete all matching key-value pairs from the database.
bdb_enum/3	Enumerate the whole database, unifying the key-value pairs to Key and Value.
bdb_environment_property/2	True when Property is a property of Environment.
bdb_get/3	Query the database.
bdb_getall/3	Get all values associated with Key.
bdb_init/1	Initialise a DB environment.
bdb_init/2	Initialise a DB environment.
bdb_open/4	Open File holding a database.
bdb_put/3	Add a new key-value pair to the database.
bdb_transaction/1	Start a transaction, execute Goal and terminate the transaction.
bdb_transaction/2	Start a transaction, execute Goal and terminate the transaction.
bdb_version/1	True when Version identifies the database version.
broadcast.pl  -- Event service
broadcast/1	Broadcast given event.
broadcast_request/1	Broadcast given event till accepted.
listen/2	Open a channel for listening for events of the given `Templ'.
listen/3	Open a channel for listening for events of the given `Templ'.
listening/3	returns currently open channels.
unlisten/1	Destroy a channel.
unlisten/2	Destroy a channel.
unlisten/3	Destroy a channel.
c14n2.pl  -- C14n2 canonical XML documents
xml_write_canonical/3	Write an XML DOM using the canonical conventions as defined by C14n2.
cgi.pl  -- Read CGI parameters
charsio.pl  -- I/O on Lists of Character Codes
atom_to_chars/2	Convert Atom into a list of character codes.
atom_to_chars/3	Convert Atom into a difference list of character codes.
format_to_chars/3	Use format/2 to write to a list of character codes.
format_to_chars/4	Use format/2 to write to a difference list of character codes.
number_to_chars/2	Convert Atom into a list of character codes.
number_to_chars/3	Convert Number into a difference list of character codes.
open_chars_stream/2	Open Codes as an input stream.
read_from_chars/2	Read Codes into Term.
read_term_from_chars/3	Read Codes into Term.
with_output_to_chars/2	Run Goal as with once/1.
with_output_to_chars/3	Run Goal as with once/1.
with_output_to_chars/4	Same as with_output_to_chars/3 using an explicit stream.
write_to_chars/2	Write a term to a code list.
write_to_chars/3	Write a term to a code list.
check.pl  -- Consistency checking
check/0	Run all consistency checks defined by checker/2.
checker/2	Register code validation routines.
list_autoload/0	Report predicates that may be auto-loaded.
list_cross_module_calls/0	List calls from one module to another using Module:Goal where the callee is not defined exported, public or multifile, i.e., where the callee should be considered private.
list_format_errors/0	List argument errors for format/2,3.
list_format_errors/1	List argument errors for format/2,3.
list_rationals/0	List rational numbers that appear in clauses.
list_rationals/1	List rational numbers that appear in clauses.
list_redefined/0	Lists predicates that are defined in the global module user as well as in a normal module; that is, predicates for which the local definition overrules the global default definition.
list_strings/0	List strings that appear in clauses.
list_strings/1	List strings that appear in clauses.
list_trivial_fails/0	List goals that trivially fail because there is no matching clause.
list_trivial_fails/1	List goals that trivially fail because there is no matching clause.
list_undefined/0	Report undefined predicates.
list_undefined/1	Report undefined predicates.
list_void_declarations/0	List predicates that have declared attributes, but no clauses.
string_predicate/1	Multifile hook to disable list_strings/0 on the given predicate.
trivial_fail_goal/1	Multifile hook that tells list_trivial_fails/0 to accept Goal as valid.
valid_string_goal/1	Multifile hook that qualifies Goal as valid for list_strings/0.
check_installation.pl  -- Check installation issues and features
check_config_files/0	Examines the locations of config files.
check_installation/0	Check features of the installed system.
check_installation/1	As check_installation/0, but additionally returns a list of Component-Problem pairs.
test_installation/0	Run regression tests in the installed system.
test_installation/1	Run regression tests in the installed system.
update_config_files/0	Move config files from their old location to the new if the file or directory exists in the old location but not in the new.
chr.pl
codesio.pl  -- I/O on Lists of Character Codes
format_to_codes/3	Use format/2 to write to a list of character codes.
format_to_codes/4	Use format/2 to write to a difference list of character codes.
open_codes_stream/2	Open Codes as an input stream.
read_from_codes/2	Read Codes into Term.
read_term_from_codes/3	Read Codes into Term.
with_output_to_codes/2	Run Goal with as once/1.
with_output_to_codes/3	Run Goal with as once/1.
with_output_to_codes/4	As with_output_to_codes/3, but Stream is unified with the temporary stream.
write_term_to_codes/3	True when Codes is a string that matches the output of write_term/3 using Options.
write_term_to_codes/4	True when Codes\Tail is a difference list containing the character codes that matches the output of write_term/3 using Options.
write_to_codes/2	Codes is a list of character codes produced by write/1 on Term.
write_to_codes/3	Codes is a difference-list of character codes produced by write/1 on Term.
coinduction.pl  -- Co-Logic Programming
console_input.pl
complete_input/4	Compute auto completions for the input line BeforeCursor+AfterCursor.
crypt.pl
crypto.pl  -- Cryptography and authentication library
csv.pl  -- Process CSV (Comma-Separated Values) data
csv/3	Prolog DCG to `read/write' CSV data.
csv/4	Prolog DCG to `read/write' CSV data.
csv_options/2	Compiled is the compiled representation of the CSV processing options as they may be passed into csv//2, etc.
csv_read_file/2	Read a CSV file into a list of rows.
csv_read_file/3	Read a CSV file into a list of rows.
csv_read_file_row/3	True when Row is a row in File.
csv_read_row/3	Read the next CSV record from Stream and unify the result with Row.
csv_read_stream/3	Read CSV data from Stream.
csv_write_file/2	Write a list of Prolog terms to a CSV file.
csv_write_file/3	Write a list of Prolog terms to a CSV file.
csv_write_stream/3	Write the rows in Data to Stream.
ctypes.pl  -- Character code classification
is_digit/3	Succeeds if `C' is a digit using `Base' as base and `Weight' represents its value.
is_paren/2	True if Open is the open-parenthesis of Close.
to_lower/2	Downcase a character code.
to_upper/2	Upcase a character code.
upper_lower/2	True when U is the character code of an uppercase character and L is the character code of the corresponding lowercase character.
date.pl  -- Process dates and times
debug.pl  -- Print debug messages and test assertions
assertion_failed/2	This hook is called if the Goal of assertion/1 fails.
debug_print_hook/3	Hook called by debug/3.
assertion/1	Acts similar to C assert() macro.
debug/1	Add/remove a topic from being printed.
debug/3	Format a message if debug topic is enabled.
debug_message_context/1	Specify additional context for debug messages.
debugging/1	Examine debug topics.
debugging/2	Examine debug topics.
list_debug_topics/0	List currently known debug topics and their setting.
nodebug/1	Add/remove a topic from being printed.
dialect.pl  -- Support multiple Prolog dialects
expects_dialect/1	Tell Prolog all subsequent code to the end of the file or the next :- expects_dialect/1 directive is written for the indicated Dialect.
source_exports/2	True if Source exports Export.
dicts.pl  -- Dict utilities
dif.pl  -- The dif/2 constraint
dif/2	Constraint that expresses that Term1 and Term2 never become identical (==/2).
doc_files.pl  -- Create stand-alone documentation files
doc_save/2	Save documentation for FileOrDir to file(s).
doc_http.pl  -- Documentation server
doc_browser/0	Open user's default browser on the documentation server.
doc_browser/1	Open user's default browser on the documentation server.
doc_enable/1	Actually activate the PlDoc server.
doc_server/1	Start a documentation server in the current Prolog process.
doc_server/2	Start a documentation server in the current Prolog process.
doc_latex.pl  -- PlDoc LaTeX backend
double_metaphone.pl  -- Phonetic string matching
edinburgh.pl  -- Some traditional Edinburgh predicates
debug/0	Switch on/off debug mode.
display/1	Write a term, ignoring operators and special syntax constructs such as brace terms ({a}) and lists ([a,b,c]).
display/2	Write a term, ignoring operators and special syntax constructs such as brace terms ({a}) and lists ([a,b,c]).
fileerrors/2	Query and change the fileerrors flag.
nodebug/0	Switch on/off debug mode.
reconsult/1	Load source file(s), wiping the old content first.
unknown/2	Edinburgh Prolog predicate for dealing dealing with undefined procedures.
edit.pl  -- Editor interface
edit/0	Edit associated or script file.
edit/1	Edit indicated object.
edit_command/2	This predicate should specify the shell-command called to invoke the user's editor.
locate/2	Locate object from the specified location.
locate/3
select_location/3
editline.pl  -- BSD libedit based command line editing
error.pl  -- Error generating support
current_encoding/1	True if Name is the name of a supported encoding.
current_type/3	True when Type is a currently defined type and Var satisfies Type of the body term Body succeeds.
domain_error/2	The argument is of the proper type, but has a value that is outside the supported values.
existence_error/2	Culprit is of the correct type and correct domain, but there is no existing (external) resource of type ObjectType that is represented by it.
existence_error/3	Culprit is of the correct type and correct domain, but there is no existing (external) resource of type ObjectType that is represented by it in the provided set.
has_type/2	True if Term satisfies Type.
instantiation_error/1	An argument is under-instantiated.
is_of_type/2	True if Term satisfies Type.
must_be/2	True if Term satisfies the type constraints for Type.
permission_error/3	It is not allowed to perform Operation on (whatever is represented by) Culprit that is of the given PermissionType (in fact, the ISO Standard is confusing and vague about these terms' meaning).
representation_error/1	A representation error indicates a limitation of the implementation.
resource_error/1	A goal cannot be completed due to lack of resources.
syntax_error/1	A text has invalid syntax.
type_error/2	Tell the user that Culprit is not of the expected ValidType.
uninstantiation_error/1	An argument is over-instantiated.
explain.pl  -- Describe Prolog Terms
explain/1	Give an explanation on Term.
explain/2	True when Explanation is an explanation of Term.
fastrw.pl  -- Fast reading and writing of terms
files.pl
filesex.pl  -- Extended operations on files
chmod/2	Set the mode of the target file.
copy_directory/2	Copy the contents of the directory From to To (recursively).
copy_file/2	Copy a file into a new file or directory.
delete_directory_and_contents/1	Recursively remove the directory Dir and its contents.
delete_directory_contents/1	Remove all content from directory Dir, without removing Dir itself.
directory_file_path/3	True when Path is the full path-name for File in Dir.
directory_member/3	True when Member is a path inside Directory.
link_file/3	Create a link in the filesystem from NewPath to OldPath.
make_directory_path/1	Create Dir and all required components (like mkdir -p).
relative_file_name/3	True when RelPath is Path, relative to the file RelToFile.
set_time_file/3	Query and set POSIX time attributes of a file.
gensym.pl  -- Generate unique symbols
git.pl  -- Run GIT commands
hash_stream.pl  -- Maintain a hash on a stream
hashtable.pl  -- Hash tables
heaps.pl  -- heaps/priority queues
add_to_heap/4	Adds Key with priority Priority to Heap0, constructing a new heap in Heap.
delete_from_heap/4	Deletes Key from Heap0, leaving its priority in Priority and the resulting data structure in Heap.
empty_heap/1	True if Heap is an empty heap.
get_from_heap/4	Retrieves the minimum-priority pair Priority-Key from Heap0.
heap_size/2	Determines the number of elements in Heap.
heap_to_list/2	Constructs a list List of Priority-Element terms, ordered by (ascending) priority.
is_heap/1	Returns true if X is a heap.
list_to_heap/2	If List is a list of Priority-Element terms, constructs a heap out of List.
merge_heaps/3	Merge the two heaps Heap0 and Heap1 in Heap.
min_of_heap/3	Unifies Key with the minimum-priority element of Heap and Priority with its priority value.
min_of_heap/5	Gets the two minimum-priority elements from Heap.
singleton_heap/3	True if Heap is a heap with the single element Priority-Key.
help.pl  -- Text based manual
hotfix.pl  -- Load hotfixes into executables
increval.pl  -- Incremental dynamic predicate modification
incr_directly_depends/2	True if Goal1 depends on Goal2 in the IDG.
incr_invalid_subgoals/1	List is a sorted list (set) of the incremental subgoals that are currently invalid.
incr_invalidate_call/1	This is the XSB name, but the manual says incr_invalidate_calls/1 and the comment with the code suggests this is misnamed.
incr_invalidate_calls/1	Invalidate all tables for subgoals of Goal as well as tables that are affected by these.
incr_is_invalid/1	True when Subgoal's table is marked as invalid.
incr_propagate_calls/1	Activate the monotonic answer propagation similarly to when a new fact is asserted for a monotonic dynamic predicate.
incr_table_update/0	Updated all invalid tables.
incr_trans_depends/2	True for each pair in the transitive closure of incr_directly_depends(G1, G2).
is_incremental_subgoal/1	This predicate non-deterministically unifies Subgoal with incrementally tabled subgoals that are currently table entries.
intercept.pl  -- Intercept and signal interface
iostream.pl  -- Utilities to deal with streams
close_any/1	Execute the Close closure returned by open_any/5.
open_any/5	Establish a stream from Specification that should be closed using Close, which can either be called or passed to close_any/1.
iso_639.pl
isub.pl  -- isub: a string similarity measure
isub/4	Similarity is a measure of the similarity/dissimilarity between Text1 and Text2.
jpl.pl  -- A Java interface for SWI Prolog 7.x
jpl_array_to_length/2	Array should be a JPL reference to a Java array of any type.
jpl_array_to_list/2	Array should be a JPL reference to a Java array of any type.
jpl_array_to_terms/2	JRef should be a JPL reference to a Java array of org.jpl7.Term instances (or ots subtypes); Terms will be a list of the terms which the respective array elements represent.
jpl_c_lib_version/1	Version is the fully qualified version identifier of the in-use C component (jpl.c) of JPL.
jpl_call/4	X should be either * an object reference, e.g.
jpl_class_to_classname/2	Class is a reference to a class object.
jpl_class_to_type/2	The Class is a reference to a (Java Universe) instance of java.lang.Class.
jpl_classname_to_class/2	EntityName is the entity name to be mapped to a class reference.
jpl_classname_to_type/2	This is a wrapper around jpl_entityname_to_type/2 to keep the old exported predicate alive.
jpl_datum_to_type/2	Datum must be a JPL representation of an instance of one (or more) Java types;.
jpl_datums_to_array/2	A will be a JPL reference to a new Java array, whose base type is the most specific Java type of which each member of Datums is (directly or indirectly) an instance.
jpl_entityname_to_type/2	EntityName is the entity name (an atom) denoting a Java type, to be mapped to a JPL type.
jpl_enumeration_element/2	Generates each Element from Enumeration.
jpl_enumeration_to_list/2	Enumeration should be a JPL reference to an object which implements the Enumeration interface.
jpl_false/1	X is @(false), the JPL representation of the Java boolean value 'false'.
jpl_get/3	X can be.
jpl_get_actual_jvm_opts/1	Returns (as a list of atoms) the options with which the JVM was initialised.
jpl_get_default_jvm_opts/1	Returns (as a list of atoms) the options which will be passed to the JVM when it is initialised, e.g.
jpl_hashtable_pair/2	Generates Key-Value pairs from the given HashTable.
jpl_is_class/1	True if Term is a JPL reference to an instance of java.lang.Class.
jpl_is_false/1	True if Term is @(false), the JPL representation of the Java boolean value 'false'.
jpl_is_null/1	True if Term is @(null), the JPL representation of Java's 'null' reference.
jpl_is_object/1	True if Term is a well-formed JPL object reference.
jpl_is_object_type/1	True if Term is an object (class or array) type, not e.g.
jpl_is_ref/1	True if Term is a well-formed JPL reference, either to a Java object or to Java's notional but important 'null' non-object.
jpl_is_true/1	True if Term is @(true), the JPL representation of the Java boolean value 'true'.
jpl_is_type/1	True if Term is a well-formed JPL type structure.
jpl_is_void/1	True if Term is @(void), the JPL representation of the pseudo Java value 'void' (which is returned by jpl_call/4 when invoked on void methods).
jpl_iterator_element/2	Iterator should be a JPL reference to an object which implements the java.util.Iterator interface.
jpl_list_to_array/2	Datums should be a proper Prolog list of JPL datums (values or references).
jpl_map_element/2	Map must be a JPL Reference to an object which implements the java.util.Map interface.
jpl_new/3	X can be: * an atomic classname, e.g.
jpl_null/1	X is @(null), the JPL representation of Java's 'null' reference.
jpl_object_to_class/2	fails silently if Object is not a valid reference to a Java object.
jpl_object_to_type/2	Object must be a proper JPL reference to a Java object (i.e.
jpl_pl_lib_version/1	Version is the fully qualified version identifier of the in-use Prolog component (jpl.pl) of JPL.
jpl_pl_syntax/1	Unifies Syntax with 'traditional' or 'modern' according to the mode in which SWI Prolog 7.x was started.
jpl_primitive_type/1	Type is an atomic JPL representation of one of Java's primitive types.
jpl_ref_to_type/2	Ref must be a proper JPL reference (to an object, null or void).
jpl_servlet_byref/3	This serves the byref servlet demo, exemplifying one tactic for implementing a servlet in Prolog by accepting the Request and Response objects as JPL references and accessing their members via JPL as required;.
jpl_servlet_byval/3	This exemplifies an alternative (to jpl_servlet_byref) tactic for implementing a servlet in Prolog; most Request fields are extracted in Java before this is called, and passed in as a multimap (a map, some of whose values are maps).
jpl_set/3	sets the Fspec-th field of (class or object) X to value V iff it is assignable.
jpl_set_default_jvm_opts/1	Replaces the default JVM initialisation options with those supplied.
jpl_set_element/2	Set must be a JPL reference to an object which implements the java.util.Set interface.
jpl_terms_to_array/2	Terms should be a proper Prolog list of arbitrary terms.
jpl_true/1	X is @(true), the JPL representation of the Java boolean value 'true'.
jpl_type_to_class/2	Type is the JPL type, a ground term designating a class or an array type.
jpl_type_to_classname/2	This is a wrapper around jpl_type_to_entityname/2 to keep the old exported predicate alive.
jpl_type_to_entityname/2	This is the converse of jpl_entityname_to_type/2.
jpl_void/1	X is @(void), the JPL representation of the pseudo Java value 'void'.
lazy_lists.pl  -- Lazy list handling
lazy_engine_next/4	Lazy list iterator for engines.
lazy_findall/3	True when List is a lazy list containing the instantiations for Template for each answer of Goal.
lazy_findall/4	True when List is a lazy list containing the instantiations for Template for each answer of Goal.
lazy_get_codes/4	Lazy list iterator to get character codes from a stream.
lazy_list/2	Create a lazy list from a callback.
lazy_list/3	Create a lazy list where the next element is defined by.
lazy_list_iterator/4	Directive to create a lazy list iterator from a predicate that gets a single next value.
lazy_list_length/2	True if Len is the length of the materialized lazy list.
lazy_list_materialize/1	Materialize the lazy list.
lazy_message_queue/4	Lazy list iterator for message queues.
lazy_read_lines/4	Lazy list iterator to read lines from Stream.
lazy_read_terms/4	Turn a stream into a lazy list of Prolog terms.
listing.pl  -- List programs and pretty print clauses
listing/0	Lists all predicates defined in the calling module.
listing/1	List matching clauses.
listing/2	List matching clauses.
portray_clause/1	Portray `Clause' on the current output stream.
portray_clause/2	Portray `Clause' on the current output stream.
portray_clause/3	Portray `Clause' on the current output stream.
lists.pl  -- List Manipulation
append/2	Concatenate a list of lists.
append/3	List1AndList2 is the concatenation of List1 and List2.
clumped/2	Pairs is a list of Item-Count pairs that represents the run length encoding of Items.
delete/3	Delete matching elements from a list.
flatten/2	Is true if FlatList is a non-nested version of NestedList.
intersection/3	True if Set3 unifies with the intersection of Set1 and Set2.
is_set/1	True if Set is a proper list without duplicates.
last/2	Succeeds when Last is the last element of List.
list_to_set/2	True when Set has the same elements as List in the same order.
max_list/2	True if Max is the largest number in List.
max_member/2	True when Max is the largest member in the standard order of terms.
max_member/3	True when Max is the largest member according to Pred, which must be a 2-argument callable that behaves like (@=<)/2.
member/2	True if Elem is a member of List.
min_list/2	True if Min is the smallest number in List.
min_member/2	True when Min is the smallest member in the standard order of terms.
min_member/3	True when Min is the smallest member according to Pred, which must be a 2-argument callable that behaves like (@=<)/2.
nextto/3	True if Y directly follows X in List.
nth0/3	True when Elem is the Index'th element of List.
nth0/4	Select/insert element at index.
nth1/3	Is true when Elem is the Index'th element of List.
nth1/4	As nth0/4, but counting starts at 1.
numlist/3	List is a list [Low, Low+1, ... High].
permutation/2	True when Xs is a permutation of Ys.
prefix/2	True iff Part is a leading substring of Whole.
proper_length/2	True when Length is the number of elements in the proper list List.
reverse/2	Is true when the elements of List2 are in reverse order compared to List1.
same_length/2	Is true when List1 and List2 are lists with the same number of elements.
select/3	Is true when List1, with Elem removed, results in List2.
select/4	Select from two lists at the same position.
selectchk/3	Semi-deterministic removal of first element in List that unifies with Elem.
selectchk/4	Semi-deterministic version of select/4.
subset/2	True if all elements of SubSet belong to Set as well.
subtract/3	Delete all elements in Delete from Set.
sum_list/2	Sum is the result of adding all numbers in List.
union/3	True if Set3 unifies with the union of the lists Set1 and Set2.
main.pl  -- Provide entry point for scripts
argv_options/3	Generic transformation of long commandline arguments to options.
cli_enable_development_system/0	Re-enable the development environment.
cli_parse_debug_options/2	Parse certain commandline options for debugging and development purposes.
main/0	Call main/1 using the passed command-line arguments.
make.pl  -- Reload modified source files
make/0	Reload all source files that have been changed since they were loaded.
reload_file/1	Reload file into the proper module.
mallocinfo.pl  -- Memory allocation details
mallinfo/1	Return the content of the struct mallinfo returned by mallinfo() as a dict.
malloc_info/1	Interface to malloc_info(), which provides an XML document describing the status of the GNU glibc malloc implementation.
md5.pl  -- MD5 hashes
md5_hash/3	Hash is the MD5 hash of Data, The conversion is controlled by Options:.
memfile.pl
modules.pl  -- Module utility predicates
in_temporary_module/3	Run Goal on temporary loaded sources and discard the module and loaded predicates after completion.
nb_rbtrees.pl  -- Non-backtrackable operations on red black trees
nb_rb_get_node/3	True if Node is the node in RBTree associated to Key.
nb_rb_insert/3	Add Key-Value to the tree RBTree using non-backtrackable destructive assignment.
nb_rb_node_value/2	Value is the value associated to Node.
nb_rb_set_node_value/2	Associate Value with Node.
nb_set.pl  -- Non-backtrackable sets
add_nb_set/2	Insert Key into the set.
add_nb_set/3	Insert Key into the set.
empty_nb_set/1	Create an empty non-backtrackable set.
gen_nb_set/2	Enumerate the members of a set in the standard order of terms.
nb_set_to_list/2	Get the elements of a an nb_set.
size_nb_set/2	Unify Size with the number of elements in the set.
obfuscate.pl  -- Code obfuscating
occurs.pl  -- Finding and counting sub-terms
contains_term/2	Succeeds if Sub is contained in Term (=, deterministically).
contains_var/2	Succeeds if Sub is contained in Term (==, deterministically).
free_of_term/2	Succeeds of Sub does not unify to any subterm of Term.
free_of_var/2	Succeeds of Sub is not equal (==) to any subterm of Term.
occurrences_of_term/3	Count the number of SubTerms in Term.
occurrences_of_var/3	Count the number of SubTerms in Term.
sub_term/2	Generates (on backtracking) all subterms of Term.
sub_term_shared_variables/3	If Sub is a sub term of Term, Vars is bound to the list of variables in Sub that also appear outside Sub in Term.
sub_var/2	Generates (on backtracking) all subterms (==) of Term.
odbc.pl
odbc_current_connection/2	True if Conn is an open ODBC connection to DSN.
odbc_current_table/2	Enumerate the existing tables.
odbc_data_source/2	Enumerate the available data-sources.
odbc_driver_connect/3	Connects to a database using SQLDriverConnect().
odbc_query/2	Execute SQL-statement that does not produce a result.
odbc_query/3	Run query without options.
odbc_table_column/3	True if Column appears in Table on Connection.
odbc_table_column/4
odbc_table_foreign_key/5	Enumerate foreign keys columns.
odbc_table_primary_key/3	Enumerate columns in primary key for table.
odbc_type/3
operators.pl  -- Manage operators
option.pl  -- Option list processing
optparse.pl  -- command line parsing
ordsets.pl  -- Ordered set manipulation
is_ordset/1	True if Term is an ordered set.
list_to_ord_set/2	Transform a list into an ordered set.
ord_add_element/3	Insert an element into the set.
ord_del_element/3	Delete an element from an ordered set.
ord_disjoint/2	True if Set1 and Set2 have no common elements.
ord_empty/1	True when List is the empty ordered set.
ord_intersect/2	True if both ordered sets have a non-empty intersection.
ord_intersect/3	Intersection holds the common elements of Set1 and Set2.
ord_intersection/2	Intersection of a powerset.
ord_intersection/3	Intersection holds the common elements of Set1 and Set2.
ord_intersection/4	Intersection and difference between two ordered sets.
ord_memberchk/2	True if Element is a member of OrdSet, compared using ==.
ord_selectchk/3	Selectchk/3, specialised for ordered sets.
ord_seteq/2	True if Set1 and Set2 have the same elements.
ord_subset/2	Is true if all elements of Sub are in Super.
ord_subtract/3	Diff is the set holding all elements of InOSet that are not in NotInOSet.
ord_symdiff/3	Is true when Difference is the symmetric difference of Set1 and Set2.
ord_union/2	True if Union is the union of all elements in the superset SetOfSets.
ord_union/3	Union is the union of Set1 and Set2.
ord_union/4	True iff ord_union(Set1, Set2, Union) and ord_subtract(Set2, Set1, New).
oset.pl  -- Ordered set manipulation
oset_addel/3	Ordered set element addition.
oset_delel/3	Ordered set element deletion.
oset_diff/3	Ordered set difference.
oset_dint/2	Distributed intersection.
oset_dunion/2	Distributed union.
oset_int/3	ordered set intersection.
oset_is/1	check that OSet in correct format (standard order).
oset_power/2	True when PSet is the powerset of Set.
oset_union/3	Union is the union of OSet1 and OSet2.
pairs.pl  -- Operations on key-value lists
group_pairs_by_key/2	Group values with equivalent (==/2) consecutive keys.
map_list_to_pairs/3	Create a Key-Value list by mapping each element of List.
pairs_keys/2	Remove the values from a list of Key-Value pairs.
pairs_keys_values/3	True if Keys holds the keys of Pairs and Values the values.
pairs_values/2	Remove the keys from a list of Key-Value pairs.
transpose_pairs/2	Swap Key-Value to Value-Key.
paxos.pl  -- A Replicated Data Store
paxos_get/1	Equivalent to paxos_key(Term,Key), pasox_get(Key,Term).
paxos_get/2	unifies Term with the entry retrieved from the Paxon's ledger.
paxos_get/3	unifies Term with the entry retrieved from the Paxon's ledger.
paxos_initialize/1	Initialize this Prolog process as a paxos node.
paxos_ledger_hook/5	Hook called for all operations on the ledger.
paxos_on_change/2	Executes the specified Goal when Key changes.
paxos_on_change/3	Executes the specified Goal when Key changes.
paxos_property/1	True if Property is a current property for the paxos network.
paxos_quorum_ask/4	Ask the paxos forum for their opinion.
paxos_replicate_key/3	Replicate a Key to Nodes.
paxos_set/1	Equivalent to paxos_key(Term,Key), pasox_set(Key,Term).
paxos_set/2	negotiates to have Key-Value recorded in the ledger for each of the quorum's members.
paxos_set/3	negotiates to have Key-Value recorded in the ledger for each of the quorum's members.
pcre.pl  -- Perl compatible regular expression matching for SWI-Prolog
re_compile/3	Compiles Pattern to a Regex blob of type regex (see blob/2).
re_flush/0	Clean pattern and replacement caches.
re_foldl/6	Fold all matches of Regex on String.
re_match/2	Succeeds if String matches Regex.
re_match/3	Succeeds if String matches Regex.
re_matchsub/4	Match String against Regex.
re_replace/4	Replace matches of the regular expression Pattern in String with With.
re_split/3	Split String using the regular expression Pattern.
re_split/4	Split String using the regular expression Pattern.
pdt_console.pl
pdt_install_console/0	Support get_single_char/1 in PDT console.
pengines.pl  -- Pengines: Web Logic Programming Made Easy
add_error_details/3	Add format error code and location information to an error.
authentication_hook/3	This hook is called from the =/pengine/create= HTTP handler to discover whether the server is accessed by an authorized user.
current_pengine_application/1	True when Application is a currently defined application.
event_to_json/3	Hook that translates a Pengine event structure into a term suitable for reply_json/1, according to the language specification Lang.
not_sandboxed/2	This hook is called to see whether the Pengine must be executed in a protected environment.
output/2	Hook to handle pengine_output/1 from the remote pengine.
pengine_abort/1	Aborts the running query.
pengine_application/1	Directive that must be used to declare a pengine application module.
pengine_ask/3	Asks pengine NameOrID a query Query.
pengine_create/1	Creates a new pengine.
pengine_debug/2	Create a message using format/3 from Format and Args and send this to the client.
pengine_destroy/1	Destroys the pengine NameOrID.
pengine_destroy/2	Destroys the pengine NameOrID.
pengine_done/0	Called from the pengine thread at_exit option.
pengine_event/2	Examines the pengine's event queue and if necessary blocks execution until a term that unifies to Term arrives in the queue.
pengine_event_loop/2	Starts an event loop accepting event terms sent to the current pengine or thread.
pengine_input/2	Sends Prompt to the master (parent) pengine and waits for input.
pengine_next/2	Asks pengine NameOrID for the next solution to a query started by pengine_ask/3.
pengine_output/1	Sends Term to the parent pengine or thread.
pengine_property/2	True when Property is a property of the given Pengine.
pengine_pull_response/2	Pulls a response (an event term) from the slave Pengine if Pengine is a remote process, else does nothing at all.
pengine_respond/3	Sends a response in the form of the term Input to a slave (child) pengine that has prompted its master (parent) for input.
pengine_rpc/2	Semantically equivalent to the sequence below, except that the query is executed in (and in the Prolog context of) the pengine server referred to by URL, rather than locally.
pengine_rpc/3	Semantically equivalent to the sequence below, except that the query is executed in (and in the Prolog context of) the pengine server referred to by URL, rather than locally.
pengine_self/1	True if the current thread is a pengine with Id.
pengine_stop/2	Tells pengine NameOrID to stop looking for more solutions to a query started by pengine_ask/3.
pengine_user/1	True when the pengine was create by an HTTP request that authorized User.
portray_blob/2	Portray non-text blobs that may appear in output terms.
prepare_goal/3	Pre-preparation hook for running Goal0.
prepare_module/3	Hook, called to initialize the temporary private module that provides the working context of a pengine.
prompt/3	Hook to handle pengine_input/2 from the remote pengine.
write_result/3	Hook that allows for different output formats.
create_pool/1	On demand creation of a thread pool for a pengine application.
pengines_io.pl  -- Provide Prolog I/O for HTML clients
pengines_sandbox.pl  -- Declare Pengine interaction sandbox-safe
safe_meta/2	Declare the pengine meta-predicates as safe.
safe_primitive/1	Declare the core pengine operations as safe.
persistency.pl  -- Provide persistent dynamic predicates
current_persistent_predicate/1	True if PI is a predicate that provides access to the persistent database DB.
db_assert/1	Assert Term into the database and record it for persistency.
db_attach/2	Use File as persistent database for the calling module.
db_attached/1	True if the context module attached to the persistent database File.
db_detach/0	Detach persistency from the calling module and delete all persistent clauses from the Prolog database.
db_retract/1	Retract terms from the database one-by-one.
db_retractall/1	Retract all matching facts and do the same in the database.
db_sync/1	Synchronise database with the associated file.
db_sync_all/1	Sync all registered databases.
persistent/1	Declare dynamic database terms.
pio.pl  -- Pure I/O
pldoc.pl  -- Process source documentation
plunit.pl  -- Unit Testing
begin_tests/1	Start a test-unit.
begin_tests/2	Start a test-unit.
current_test/5	True when a test with the specified properties is loaded.
end_tests/1	Close a unit-test module.
load_test_files/1	Load .plt test-files related to loaded source-files.
run_tests/0	Run tests and report about the results.
run_tests/1	Run tests and report about the results.
running_tests/0	Print the currently running test.
set_test_options/1	Specifies how to deal with test suites.
test_report/1	Produce reports on test results after the run.
message_hook/3	Redefine printing some messages.
porter_stem.pl
portray_text.pl  -- Portray text
is_text_code/1	Multifile hook that can be used to extend the set of character codes that is recognised as likely text.
portray_text/1	Switch portraying on or off.
set_portray_text/2	Set options for portraying.
set_portray_text/3	Set options for portraying.
pprint.pl  -- Pretty Print Prolog terms
print_term/2	Pretty print a Prolog term.
predicate_options.pl  -- Access and analyse predicate options
assert_predicate_options/4	As predicate_options(:PI, +Arg, +Options).
check_predicate_option/3	Verify predicate options at runtime.
check_predicate_options/0	Analyse loaded program for erroneous options.
check_predicate_options/1	Verify calls to predicates that have options in all clauses of the predicate indicated by PredicateIndicator.
current_option_arg/2	True when Arg of PI processes predicate options.
current_predicate_option/3	True when Arg of PI processes Option.
current_predicate_options/3	True when Options is the current active option declaration for PI on Arg.
derive_predicate_options/0	Derive new predicate option declarations.
derived_predicate_options/1	Derive predicate option declarations for a module.
derived_predicate_options/3	Derive option arguments using static analysis.
predicate_options/3	Declare that the predicate PI processes options on Arg.
retractall_predicate_options/0	Remove all dynamically (derived) predicate options.
process.pl  -- Create processes and redirect I/O
prolog_autoload.pl  -- Autoload all dependencies
prolog_breakpoints.pl  -- Manage Prolog break-points
breakpoint_property/2	True when Property is a property of the breakpoint Id.
delete_breakpoint/1	Delete breakpoint with given Id.
set_breakpoint/4	Put a breakpoint at the indicated source-location.
set_breakpoint/5	Put a breakpoint at the indicated source-location.
prolog_clause.pl  -- Get detailed source-information about a clause
clause_info/4	Fetches source information for the given clause.
clause_info/5	Fetches source information for the given clause.
clause_name/2	Provide a suitable description of the indicated clause.
initialization_layout/4	Find term-layout of :- initialization directives.
make_varnames/5	Create a Term varnames(...) where each argument contains the name of the variable at that offset.
open_source/2	Hook into clause_info/5 that opens the stream holding the source for a specific clause.
predicate_name/2	Describe a predicate as [Module:]Name/Arity.
unify_goal/5	This hook is called to fix up source code manipulations that result from goal expansions.
unify_term/2	Unify the two terms, where T2 is created by writing the term and reading it back in, but be aware that rounding problems may cause floating point numbers not to unify.
prolog_code.pl  -- Utilities for reasoning about code
prolog_codewalk.pl  -- Prolog code walker
prolog_program_clause/2	True when ClauseRef is a reference for clause in the program.
prolog_walk_code/1	Walk over all loaded (user) Prolog code.
subterm_pos/5	True when SubTerm is a sub term of Term, compared using Cmp, TermPosition describes the term layout of Term and SubTermPos describes the term layout of SubTerm.
prolog_colour.pl  -- Prolog syntax colouring support.
prolog_colourise_query/3	Colourise a query, to be executed in the context of SourceId.
prolog_colourise_stream/3	Determine colour fragments for the data on Stream.
prolog_colourise_stream/4	Determine colour fragments for the data on Stream.
prolog_colourise_term/4	Colourise the next term on Stream.
syntax_colour/2	True when a range classified Class must be coloured using Attributes.
vararg_goal_classification/3	Multifile hookable classification for vararg predicates.
prolog_config.pl  -- Provide configuration information
apple_bundle_libdir/1	If we are part of a MacOS bundle the C libraries are in the bundle Frameworks directory and the executable is in the bundle MacOS directory.
prolog_dump_runtime_variables/0	Dump the current configuration in shell format.
prolog_deps.pl  -- Compute file dependencies
prolog_format.pl  -- Analyse format specifications
prolog_history.pl  -- Per-directory persistent commandline history
prolog_history/1	Execute Action on the history.
prolog_install.pl  -- Installation support predicates
prolog_jiti.pl  -- Just In Time Indexing (JITI) utilities
jiti_list/0	List the JITI (Just In Time Indexes) of selected predicates.
jiti_list/1	List the JITI (Just In Time Indexes) of selected predicates.
prolog_metainference.pl  -- Infer meta-predicate properties
infer_meta_predicate/2	True when MetaSpec is a meta-predicate specifier for the predicate Head.
inferred_meta_predicate/2	True when MetaSpec is an inferred meta-predicate specification for Head.
prolog_pack.pl  -- A package manager for Prolog
atom_version/2	Translate between atomic version representation and term representation.
environment/2	Hook to define the environment for building packs.
pack_attach/2	Attach a single package in Dir.
pack_info/1	Print more detailed information about Pack.
pack_install/1	Install a package.
pack_install/2	Install package Name.
pack_list/1	Query package server and installed packages and display results.
pack_list_installed/0	List currently installed packages.
pack_property/2	True when Property is a property of an installed Pack.
pack_rebuild/0	Rebuild foreign components of all packages.
pack_rebuild/1	Rebuilt possible foreign components of Pack.
pack_remove/1	Remove the indicated package.
pack_search/1	Query package server and installed packages and display results.
pack_upgrade/1	Try to upgrade the package Pack.
pack_url_file/2	True if File is a unique id for the referenced pack and version.
ssl_verify/5	Currently we accept all certificates.
prolog_server.pl
prolog_server/2	Create a TCP/IP based server on the given Port, so you can telnet into Prolog and run an interactive session.
prolog_source.pl  -- Examine Prolog source-files
quasi_quotation_syntax/2	True when the quasi quotation syntax Syntax can be loaded from Library.
xref_close_source/2	Called by prolog_close_source/1 to close a source previously opened by the hook prolog:xref_open_source/2.
xref_open_source/2	Hook to open an xref SourceID.
directory_source_files/3	True when Files is a sorted list of Prolog source files in Dir.
file_alias_path/2	True if file Alias points to Dir.
file_name_on_path/2	True if OnPath a description of File based on the file search path.
load_quasi_quotation_syntax/2	Import quasi quotation syntax Syntax from Path into the module specified by the first argument.
path_segments_atom/2	Translate between a path represented as a/b/c and an atom representing the same path.
prolog_canonical_source/2	Given a user-specification of a source, generate a unique and indexable identifier for it.
prolog_close_source/1	Close a stream opened using prolog_open_source/2.
prolog_open_source/2	Open source with given canonical id (see prolog_canonical_source/2) and remove the #!
prolog_read_source_term/4	Read a term from a Prolog source-file.
read_source_term_at_location/3	Try to read a Prolog term form an arbitrary location inside a file.
requires_library/2	known expansion hooks.
prolog_stack.pl  -- Examine the Prolog stack
prolog_stream.pl  -- A stream with Prolog callbacks
prolog_trace.pl  -- Print access to predicates
trace/1	Print passes through ports of specified predicates.
trace/2	Print passes through ports of specified predicates.
tracing/2	True if Spec is traced using Ports.
prolog_wrap.pl  -- Wrapping predicates
current_predicate_wrapper/4	True if Head is wrapped with Body.
unwrap_predicate/2	Remove the outermost wrapper whose name unifies with Name.
wrap_predicate/4	Wrap the predicate referenced by Head using Body.
prolog_xref.pl  -- Prolog cross-referencer data collection
called_by/2	If this succeeds, the cross-referencer assumes Goal may call any of the goals in ListOfCalled.
called_by/4	True when Called is a list of callable terms called from Goal, handled by the predicate Module:Goal and executed in the context of the module Context.
hook/1	True if Goal is a hook that is called spontaneously (e.g., from foreign code).
meta_goal/2	Define meta-predicates.
xref_called/3	True when By is called from Called in Source.
xref_called/4	True when By is called from Called in Source.
xref_called/5	True when By is called from Called in Source.
xref_clean/1	Reset the database for the given source.
xref_comment/3	Is true when Source has a section comment with Title and Comment.
xref_comment/4	Is true when Head in Source has the given PlDoc comment.
xref_current_source/1	Check what sources have been analysed.
xref_defined/3	Test if Goal is accessible in Source.
xref_definition_line/2	If the 3th argument of xref_defined contains line info, return this in Line.
xref_done/2	Cross-reference executed at Time.
xref_exported/2	True when Source exports Head.
xref_hook/1	Definition of known hooks.
xref_meta/2	True when Called is a list of terms called from Head.
xref_meta/3	True when Head calls Called in Source.
xref_mode/3	Is true when Source provides a predicate with Mode and determinism.
xref_module/2	True if Module is defined in Source.
xref_op/2	Give the operators active inside the module.
xref_option/2	True when Source was processed using Option.
xref_prolog_flag/4	True when Flag is set to Value at Line in Source.
xref_public_list/3	Find meta-information about File.
xref_public_list/4	Find meta-information about File.
xref_public_list/6	Find meta-information about File.
xref_public_list/7	Find meta-information about File.
xref_source/1	Generate the cross-reference data for Source if not already done and the source is not modified.
xref_source/2	Generate the cross-reference data for Source if not already done and the source is not modified.
xref_source_file/3	Find named source file from Spec, relative to Src.
xref_source_file/4	Find named source file from Spec, relative to Src.
xref_uses_file/3	True when Source tries to load a file using Spec.
protobufs.pl  -- Google's Protocol Buffers ("protobufs")
protobuf_message/2	Marshals and unmarshals byte streams encoded using Google's Protobuf grammars.
protobuf_message/3	Marshals and unmarshals byte streams encoded using Google's Protobuf grammars.
protobuf_parse_from_codes/3	Process bytes (list of int) that is the serialized form of a message (designated by MessageType), creating a Prolog term.
protobuf_serialize_to_codes/3	Process a Prolog term into bytes (list of int) that is the serialized form of a message (designated by MessageType).
pure_input.pl  -- Pure Input from files and streams
lazy_list_character_count/3	True when CharCount is the current character count in the Lazy list.
lazy_list_location/3	Determine current (error) location in a lazy list.
phrase_from_file/2	Process the content of File using the DCG rule Grammar.
phrase_from_file/3	As phrase_from_file/2, providing additional Options.
phrase_from_stream/2	Run Grammer against the character codes on Stream.
stream_to_lazy_list/2	Create a lazy list representing the character codes in Stream.
syntax_error/3	Throw the syntax error Error at the current location of the input.
pwp.pl  -- Prolog Well-formed Pages
qpforeign.pl  -- Quintus compatible foreign loader
load_foreign_files/0	Calls make_foreign_wrapper_file(+File), compiles the wrapper and loads the predicates.
load_foreign_files/2	Calls make_foreign_wrapper_file(+File), compiles the wrapper and loads the predicates.
load_foreign_files/3	Calls make_foreign_wrapper_file(+File), compiles the wrapper and loads the predicates.
load_foreign_resource/2	Load a foreign module.
make_foreign_resource_wrapper/3	Create a wrapper-file for the given foreign resource.
make_foreign_wrapper_file/1	Just output the wrapper file to the named .c file.
make_foreign_wrapper_file/2	Just output the wrapper file to the named .c file.
make_shared_object/3	Generate a wrapper and link it using plld to the given SharedObject.
qsave.pl  -- Save current program as a state or executable
arch_shlib/3	This is a user defined hook called by qsave_program/2.
qsave_program/1	Make a saved state in file `File'.
qsave_program/2	Make a saved state in file `File'.
qsave_toplevel/0	Called to handle `-c file` compilaton.
quasi_quotations.pl  -- Define Quasi Quotation syntax
quintus.pl  -- Quintus compatibility
abs/2	Unify `Absolute' with the absolute value of `Number'.
acos/2	Math library predicates.
asin/2	Math library predicates.
atan/2	Math library predicates.
atan2/3	Math library predicates.
atom_char/2	Same as ISO char_code/2.
ceiling/2	Math library predicates.
compile/1	Compile files.
cos/2	Math library predicates.
current_stream/3	SICStus/Quintus and backward compatible predicate.
date/1	Get current date as date(Y,M,D).
floor/2	Math library predicates.
genarg/3	Generalised version of ISO arg/3.
log/2	Math library predicates.
log10/2	Math library predicates.
midstring/3	Too difficult to explain.
midstring/4	Too difficult to explain.
midstring/5	Too difficult to explain.
midstring/6	Too difficult to explain.
mode/1	Ignore a DEC10/Quintus :- mode(Head) declaration.
no_style_check/1	Same as SWI-Prolog style_check(-Style).
on_exception/3
otherwise/0	For (A -> B ; otherwise -> C).
pow/3	Math library predicates.
prolog_flag/2	Same as ISO current_prolog_flag/2.
raise_exception/1	Quintus compatible exception handling.
round/2	Math library predicates.
sign/2	Math library predicates.
simple/1	Term is atomic or a variable.
sin/2	Math library predicates.
skip_line/0	Skip the rest of the current line (on Stream).
skip_line/1	Skip the rest of the current line (on Stream).
sqrt/2	Math library predicates.
stream_position/3	True when Old is the current position in Stream and the stream has been repositioned to New.
tan/2	Math library predicates.
unix/1	This predicate provides a partial emulation of the corresponding Quintus predicate.
random.pl  -- Random numbers
getrand/1	Query/set the state of the random generator.
maybe/0	Succeed/fail with equal probability (variant of maybe/1).
maybe/1	Succeed with probability P, fail with probability 1-P.
maybe/2	Succeed with probability K/N (variant of maybe/1).
random/1	Binds R to a new random float in the open interval (0.0,1.0).
random/3	Generate a random integer or float in a range.
random_between/3	Binds R to a random integer in [L,U] (i.e., including both L and U).
random_member/2	X is a random member of List.
random_perm2/4	Does X=A,Y=B or X=B,Y=A with equal probability.
random_permutation/2	Permutation is a random permutation of List.
random_select/3	Randomly select or insert an element.
randseq/3	S is a list of K unique random integers in the range 1..N.
randset/3	S is a sorted list of K unique random integers in the range 1..N.
setrand/1	Query/set the state of the random generator.
rbtrees.pl  -- Red black trees
rdf.pl  -- RDF/XML parser
load_rdf/2	Parse an XML file holding an RDF term into a list of RDF triples.
load_rdf/3	Parse an XML file holding an RDF term into a list of RDF triples.
process_rdf/3	Process RDF from Input.
xml_to_rdf/3
rdf_diagram.pl  -- Show graphical representation of a set of triples
rdf_diagram_from_file/1	Show the triples from File in a window.
rdf_parser.pl
element_to_plrdf/3	Rewrite a single XML element.
rdf_name_space/1	True if URL must be handled as rdf: Determines special handling of rdf:about, rdf:resource, etc.
xml_to_plrdf/3	Translate an XML (using namespaces) term into an Prolog term representing the RDF data.
rdf_triple.pl  -- Create triples from intermediate representation
rdf_write.pl  -- Write RDF/XML from a list of triples
readline.pl  -- GNU readline interface
readln.pl  -- Read line as list of tokens
readutil.pl  -- Read utilities
read_file_to_codes/3	Read the file Spec into a list of Codes.
read_file_to_string/3	Read the file Spec into a the string String.
read_file_to_terms/3	Read the file Spec into a list of terms.
read_line_to_codes/2	Read the next line of input from Stream.
read_line_to_codes/3	Difference-list version to read an input line to a list of character codes.
read_line_to_string/2	Read the next line from Stream into String.
read_stream_to_codes/2	Read input from Stream to a list of character codes.
read_stream_to_codes/3	Read input from Stream to a list of character codes.
record.pl  -- Access compound arguments by name
current_record/2	True if Name is the name of a record defined in the module associated with Term and Term is the user-provided record declaration.
current_record_predicate/2	True if PI is the predicate indicator for an access predicate to Record.
record/1	Define access predicates for a compound-term.
redis.pl  -- Redis client
redis_streams.pl  -- Using Redis streams
rewrite_term.pl
rewrite_term/2	Invoke the term-rewriting system.
rlimit.pl
saml.pl  -- SAML Authentication
sandbox.pl  -- Sandboxed Prolog code
settings.pl  -- Setting management
convert_setting_text/3	Converts from textual form to Prolog Value.
current_setting/1	True if Setting is a currently defined setting.
env/2	Evaluate environment variables on behalf of arithmetic expressions.
env/3	Evaluate environment variables on behalf of arithmetic expressions.
list_settings/0	List settings to current_output.
list_settings/1	List settings to current_output.
load_settings/1	Load local settings from File.
load_settings/2	Load local settings from File.
restore_setting/1	Restore the value of setting Name to its default.
save_settings/0	Save modified settings to File.
save_settings/1	Save modified settings to File.
set_setting/2	Change a setting.
set_setting_default/2	Change the default for a setting.
setting/2	True when Name is a currently defined setting with Value.
setting/4	Define a setting.
setting_property/2	Query currently defined settings.
sgml.pl  -- SGML, XML and HTML parser
dtd/2	DTD is a DTD object created from the file dtd(Type).
load_dtd/3	Load DtdFile into a DTD.
load_html/3	Load HTML text from Input and unify the resulting DOM structure with DOM.
load_html_file/2	Load HTML from File and unify the resulting DOM structure with DOM.
load_sgml/3	Load SGML text from Input and unify the resulting DOM structure with DOM.
load_sgml_file/2	Load SGML from File and unify the resulting DOM structure with DOM.
load_structure/3	Parse Source and return the resulting structure in ListOfContent.
load_xml/3	Load XML text from Input and unify the resulting DOM structure with DOM.
load_xml_file/2	Load XML from File and unify the resulting DOM structure with DOM.
xml_basechar/1	XML character classification predicates.
xml_combining_char/1	XML character classification predicates.
xml_digit/1	XML character classification predicates.
xml_extender/1	XML character classification predicates.
xml_ideographic/1	XML character classification predicates.
xml_is_dom/1	True if term statisfies the structure as returned by load_structure/3 and friends.
xml_name/1	True if Atom is a valid XML name.
xml_quote_attribute/2	Backward compatibility for versions that allow to specify encoding.
xml_quote_cdata/2	Backward compatibility for versions that allow to specify encoding.
sgml_write.pl  -- XML/SGML writer module
html_write/2	Write a term as created by the SGML/XML parser to a stream in SGML or XML format.
html_write/3	Write a term as created by the SGML/XML parser to a stream in SGML or XML format.
sgml_write/2	Write a term as created by the SGML/XML parser to a stream in SGML or XML format.
sgml_write/3	Write a term as created by the SGML/XML parser to a stream in SGML or XML format.
xml_write/2	Write a term as created by the SGML/XML parser to a stream in SGML or XML format.
xml_write/3	Write a term as created by the SGML/XML parser to a stream in SGML or XML format.
xmlns/2	Hook to define human readable abbreviations for XML namespaces.
sha.pl  -- SHA secure hashes
file_sha1/2	True when SHA1 is the SHA1 hash for the content of File.
hash_atom/2	Convert a list of bytes (integers 0..255) into the usual hexadecimal notation.
hmac_sha/4	For Options, see sha_hash/3.
sha_hash/3	Hash is the SHA hash of Data, The conversion is controlled by Options:.
sha_hash_ctx/4	Hash is the SHA hash of Data.
sha_new_ctx/2	NewContext is unified with the empty SHA computation context (which includes the Options.) It could later be passed to sha_hash_ctx/4.
shell.pl  -- Elementary shell commands
shlib.pl  -- Utility library for loading foreign objects (DLLs, shared objects)
snowball.pl  -- The Snowball multi-lingual stemmer library
snowball/3	Apply the Snowball Algorithm on Input and unify the result (an atom) with Stem.
snowball_current_algorithm/1	True if Algorithm is the official name of an algorithm suported by snowball/3.
socket.pl  -- Network socket (TCP and UDP) library
gethostname/1	Return the canonical fully qualified name of this host.
negotiate_socks_connection/2	Negotiate a connection to DesiredEndpoint over StreamPair.
proxy_for_url/3	This hook can be implemented to return a proxy to try when connecting to URL.
tcp_accept/3	This predicate waits on a server socket for a connection request by a client.
tcp_bind/2	Bind the socket to Address on the current machine.
tcp_close_socket/1	Closes the indicated socket, making SocketId invalid.
tcp_connect/2	Connect SocketId.
tcp_connect/3	Establish a TCP communication as a client.
tcp_connect/4	Connect a (client) socket to Address and return a bi-directional connection through the stream-handles Read and Write.
tcp_fcntl/3	Interface to the fcntl() call.
tcp_getopt/2	Get information about Socket.
tcp_host_to_address/2	Translate between a machines host-name and it's (IP-)address.
tcp_listen/2	Tells, after tcp_bind/2, the socket to listen for incoming requests for connections.
tcp_open_socket/2	Create streams to communicate to SocketId.
tcp_open_socket/3	Similar to tcp_open_socket/2, but creates two separate sockets where tcp_open_socket/2 would have created a stream pair.
tcp_select/3	Same as the built-in wait_for_input/3.
tcp_setopt/2	Set options on the socket.
tcp_socket/1	Creates an INET-domain stream-socket and unifies an identifier to it with SocketId.
try_proxy/4	Attempt a socket-level connection via the given proxy to TargetAddress.
solution_sequences.pl  -- Modify solution sequences
call_nth/2	True when Goal succeeded for the Nth time.
distinct/1	True if Goal is true and no previous solution of Goal bound Witness to the same value.
distinct/2	True if Goal is true and no previous solution of Goal bound Witness to the same value.
group_by/4	Group bindings of Template that have the same value for By.
limit/2	Limit the number of solutions.
offset/2	Ignore the first Count solutions.
order_by/2	Order solutions according to Spec.
reduced/1	Similar to distinct/1, but does not guarantee unique results in return for using a limited amount of memory.
reduced/3	Similar to distinct/1, but does not guarantee unique results in return for using a limited amount of memory.
sort.pl
locale_sort/2	Sort a list of atoms using the current locale.
predsort/3	Sorts similar to sort/2, but determines the order of two terms by calling Compare(-Delta, +E1, +E2).
ssl.pl  -- Secure Socket Layer (SSL) library
cert_accept_any/5	Implementation for the hook `cert_verify_hook(:Hook)` that accepts any certificate.
certificate_field/2	Retrieve the field matching Field from Certificate.
load_certificate/2	Loads a certificate from a PEM- or DER-encoded stream, returning a certificate.
load_crl/2	Loads a CRL from a PEM- or DER-encoded stream, returning a term containing terms hash/1, signature/1, issuer_name/1 and revocations/1, which is a list of revoked/2 terms.
load_private_key/3	Load a private key PrivateKey from the given stream Stream, using Password to decrypt the key if it is encrypted.
load_public_key/2	Load a public key PublicKey from the given stream Stream.
same_certificate/2	True if CertificateA is logically the same as CertificateB, even if they are stored in different blobs.
ssl_add_certificate_key/4	Add an additional certificate/key pair to SSL0, yielding SSL.
ssl_context/3	Create an SSL context.
ssl_negotiate/5	Once a connection is established and a read/write stream pair is available, (PlainRead and PlainWrite), this predicate can be called to negotiate an SSL session over the streams.
ssl_peer_certificate/2	True if the peer certificate is provided (this is always the case for a client connection) and Certificate unifies with the peer certificate.
ssl_peer_certificate_chain/2	Certificates is the certificate chain provided by the peer, represented as a list of certificates.
ssl_property/2	True when Property is a property of SSL.
ssl_secure_ciphers/1	Ciphers is a secure cipher preference list that can be used in the cipher_list/1 option of ssl_context/3.
ssl_session/2	Retrieves (debugging) properties from the SSL context associated with Stream.
ssl_set_options/3	SSL is the same as SSL0, except for the options specified in Options.
ssl_upgrade_legacy_options/2	Handle deprecated cacert_file(Spec) option and map it to the new cacerts(+List) option.
system_root_certificates/1	List is a list of trusted root certificates as provided by the OS.
verify_certificate/3	True if it is possible to build a chain of trust from Certificate to one of the certificates in TrustedCertificates, optionally using the (untrusted) certificates in AuxiliaryCertificates to complete the chain.
verify_certificate_issuer/2	True if Certificate is a certificate which was issued by the certificate Issuer.
write_certificate/3	Writes a certificate to the stream Stream.
statistics.pl  -- Get information about resource usage
stomp.pl  -- STOMP client.
stomp_abort/2	Send a ABORT frame.
stomp_ack/2	Reply with an ACK or NACK based on the received message header.
stomp_ack/3	Send an ACK frame.
stomp_begin/2	Send a BEGIN frame.
stomp_commit/2	Send a COMMIT frame.
stomp_connect/1	Setup the connection.
stomp_connect/2	Setup the connection.
stomp_connection/5	Create a connection reference.
stomp_connection/6	Create a connection reference.
stomp_connection_property/2	True when Property, is a property of Connection.
stomp_destroy_connection/1	Destroy a connection.
stomp_disconnect/2	Send a DISCONNECT frame.
stomp_nack/2	Reply with an ACK or NACK based on the received message header.
stomp_nack/3	Send a NACK frame.
stomp_reconnect/1	Teardown the connection and try to reconnect.
stomp_send/4	Send a SEND frame.
stomp_send_json/4	Send a SEND frame.
stomp_setup/2	Set up the actual socket connection and start receiving thread.
stomp_subscribe/4	Send a SUBSCRIBE frame.
stomp_teardown/1	Tear down the socket connection, stop receiving thread and heartbeat thread (if applicable).
stomp_transaction/2	Run Goal as once/1, tagging all SEND messages inside the transaction with the transaction id.
stomp_unsubscribe/2	Send an UNSUBSCRIBE frame.
streaminfo.pl
streampool.pl  -- Input multiplexing
close_stream_pool/0	Close all streams in the pool.
delete_stream_from_pool/1	Retract stream from the pool.
dispatch_stream_pool/1	Wait for input on one or more streams and handle that.
stream_pool_main_loop/0	Keep handling input from the streams in the pool until they have all died away.
strings.pl  -- String utilities
dedent_lines/3	Remove shared indentation for all lines in a string.
indent_lines/3	Add Prefix to the beginning of lines in In.
indent_lines/4	Similar to indent_lines/3, but only adds Prefix to lines for which call(Filter, Line) succeeds.
interpolate_string/4	Establish a string from a template by replacing patterns.
string/4	Implements the quasi quotation syntax string.
string_lines/2	True when String represents Lines.
syslog.pl  -- Unix syslog interface
debug_print_hook/3	Integration of debug/3 with the syslog facility.
closelog/0	Close the system log.
openlog/3	Open system log.
syslog/2	Send a message to the system log.
syslog/3	Send a formatted message to the system log if system logging is opened using openlog/3.
system.pl  -- System utilities
lock_predicate/1	Transform a predicate into a system predicate.
system_mode/1	Switch the system into system or user mode.
system_module/0	Any predicate defined after this declaraction uptil the end of the file will become a system predicate.
unlock_predicate/1	Transform a system predicate into a normal system predicate.
table.pl
table_util.pl  -- Tabular file handling utilities
sort_table/2	Read the records from the given table, sort them according to the ordering information on the key field and write the result to the given filename.
verify_table_order/1	If Table is a handle to a defined table and the table contains a key-fields, check that the fields in the table are really sorted according to the order defined in the table.
tables.pl  -- XSB interface to tables
term_to_json.pl
term_to_json/2	Convert any general Prolog term into a JSON term.
term_to_json/3	Convert any general Prolog term into a JSON term.
terms.pl  -- Term manipulation
test_cover.pl  -- Clause coverage analysis
assert_cover/2	Assert coverage of the current clause.
show_coverage/1	Report on coverage by Goal.
show_coverage/2	Report on coverage by Goal.
test_wizard.pl  -- Test Generation Wizard
make_test/3	Generate a test from a query.
make_tests/3	Create tests from queries stored in File and write the tests for Module to the stream Out.
thread.pl  -- High level thread primitives
call_in_thread/2	Run Goal as an interrupt in the context of Thread.
concurrent/3	Run Goals in parallel using N threads.
concurrent_and/2	Concurrent version of (Generator,Test).
concurrent_and/3	Concurrent version of (Generator,Test).
concurrent_forall/2	True when Action is true for all solutions of Generate.
concurrent_forall/3	True when Action is true for all solutions of Generate.
concurrent_maplist/2	Concurrent version of maplist/2.
concurrent_maplist/3	Concurrent version of maplist/2.
concurrent_maplist/4	Concurrent version of maplist/2.
first_solution/3	Try alternative solvers concurrently, returning the first answer.
thread_pool.pl  -- Resource bounded thread management
create_pool/1	Hook to create a thread pool lazily.
current_thread_pool/1	True if Name refers to a defined thread pool.
thread_create_in_pool/4	Create a thread in Pool.
thread_pool_create/3	Create a pool of threads.
thread_pool_destroy/1	Destroy the thread pool named Name.
thread_pool_property/2	True if Property is a property of thread pool Name.
worker_exitted/3	It is possible that '__thread_pool_manager' no longer exists while closing down the process because the manager was killed before the worker.
threadutil.pl  -- Interactive thread utilities
attach_console/0	Create a new console and make the standard Prolog streams point to it.
attach_console/1	Create a new console and make the standard Prolog streams point to it.
interactor/0	Run a Prolog toplevel in another thread with a new console window.
interactor/1	Run a Prolog toplevel in another thread with a new console window.
join_threads/0	Join all terminated threads.
tbacktrace/1	Print a backtrace for Thread to the stream user_error of the calling thread.
tbacktrace/2	Print a backtrace for Thread to the stream user_error of the calling thread.
tdebug/0	Enable debug-mode, trapping the graphical debugger on reaching spy-points or errors.
tdebug/1	Enable debug-mode, trapping the graphical debugger on reaching spy-points or errors.
thread_has_console/0	True when the calling thread has an attached console.
thread_run_interactor/0	Attach a console and run a Prolog toplevel in the current thread.
threads/0	List currently known threads with their status.
tnodebug/0	Disable debug-mode in all threads or the specified Thread.
tnodebug/1	Disable debug-mode in all threads or the specified Thread.
tprofile/1	Profile the operation of Thread until the user hits a key.
tspy/1	Trap the graphical debugger on reaching Spec in the specified or any thread.
tspy/2	Trap the graphical debugger on reaching Spec in the specified or any thread.
xterm_args/1	Multifile and dynamic hook that provides (additional) arguments for the xterm(1) process opened for additional thread consoles.
time.pl  -- Time and alarm library
alarm/3	Set up an alarm to be signaled Time seconds from now.
alarm/4	Set up an alarm to be signaled Time seconds from now.
alarm_at/3	As alarm/3 and alarm/4, but schedule the alarm at an absolute point in time.
alarm_at/4	As alarm/3 and alarm/4, but schedule the alarm at an absolute point in time.
call_with_time_limit/2	Call Goal, while watching out for a (wall-time) limit.
current_alarm/4	Enumerate the alarms in the schedule.
install_alarm/1	Install an alarm allocated using alarm/4 with the install(false) option or de-activated using uninstall_alarm/1.
install_alarm/2	Install an alarm allocated using alarm/4 with the install(false) option or de-activated using uninstall_alarm/1.
remove_alarm/1	Remove an alarm.
uninstall_alarm/1	De-activate an alarm.
tty.pl  -- Terminal operations
menu/3	Show a menu.
tty_clear/0	Clear the display.
tty_flash/0	Give visual signal if possible, otherwise beep.
udp_broadcast.pl  -- A UDP broadcast proxy
udp_broadcast_close/1	Close a UDP broadcast scope.
udp_broadcast_initialize/2	Initialized UDP broadcast bridge.
udp_peer/2	Manage and query the set of known peers for a unicast network.
udp_peer_add/2	Manage and query the set of known peers for a unicast network.
udp_peer_del/2	Manage and query the set of known peers for a unicast network.
udp_term_string_hook/3	Hook for serializing the message Term.
udp_unicast_join_hook/3	This multifile hook is called if an UDP package is received on the port of the unicast network identified by Scope.
ugraphs.pl  -- Graph manipulation library
add_edges/3	Unify NewGraph with a new graph obtained by adding the list of Edges to Graph.
add_vertices/3	Unify NewGraph with a new graph obtained by adding the list of Vertices to Graph.
complement/2	UGraphOut is a ugraph with an edge between all vertices that are not connected in UGraphIn and all edges from UGraphIn removed.
compose/3	Compose NewGraph by connecting the drains of LeftGraph to the sources of RightGraph.
connect_ugraph/3	Adds Start as an additional vertex that is connected to all vertices in UGraphIn.
del_edges/3	Unify NewGraph with a new graph obtained by removing the list of Edges from Graph.
del_vertices/3	Unify NewGraph with a new graph obtained by deleting the list of Vertices and all the edges that start from or go to a vertex in Vertices to the Graph.
edges/2	Unify Edges with all edges appearing in Graph.
neighbors/3	Neigbours is a sorted list of the neighbours of Vertex in Graph.
neighbours/3	Neigbours is a sorted list of the neighbours of Vertex in Graph.
reachable/3	True when Vertices is an ordered set of vertices reachable in UGraph, including Vertex.
top_sort/2	Sorted is a topological sorted list of nodes in Graph.
top_sort/3	Sorted is a topological sorted list of nodes in Graph.
transitive_closure/2	Generate the graph Closure as the transitive closure of Graph.
transpose_ugraph/2	Unify NewGraph with a new graph obtained from Graph by replacing all edges of the form V1-V2 by edges of the form V2-V1.
ugraph_union/3	NewGraph is the union of Graph1 and Graph2.
vertices/2	Unify Vertices with all vertices appearing in Graph.
vertices_edges_to_ugraph/3	Create a UGraph from Vertices and edges.
uid.pl  -- User and group management on Unix systems
getegid/1	GID is the effective group ID of the calling process.
geteuid/1	UID is the effective user ID of the calling process.
getgid/1	GID is the real group ID of the calling process.
getgroups/1	GroupsIDs is the set of supplementary group IDs of the calling process.
getuid/1	UID is the real user ID of the calling process.
group_data/3	Value is the value for Field GroupData.
group_info/2	GroupData represent the group information for Group.
initgroups/2	Initialise the group access list of the calling process to the registered groups for User and the group Group.
set_user_and_group/1	Set the UID and GID to the User.
set_user_and_group/2	Set the UID and GID to the User.
setegid/1	Set the effective group id of the calling process.
seteuid/1	Set the effective user id of the calling process.
setgid/1	Set the group id of the calling process.
setgroups/1	Set the group access list of the caling process to the indicated groups.
setuid/1	Set the user id of the calling process.
user_data/3	Value is the value for Field in UserData.
user_info/2	UserData represent the passwd information for User.
unicode.pl  -- Unicode string handling
unicode_map/3	Perform unicode normalization operations.
unicode_nfc/2	Characters are decomposed and then recomposed by canonical equivalence.
unicode_nfd/2	Characters are decomposed by canonical equivalence.
unicode_nfkc/2	Characters are decomposed by compatibility equivalence, then recomposed by canonical equivalence.
unicode_nfkd/2	Characters are decomposed by compatibility equivalence.
unicode_property/2	True if Property is defined for Char.
unix.pl  -- Unix specific operations
detach_IO/0	Detach I/O similar to detach_IO/1.
detach_IO/1	This predicate is intended to create Unix deamon processes.
dup/2	Interface to Unix dup2(), copying the underlying filedescriptor and thus making both streams point to the same underlying object.
exec/1	Replace the running program by starting Command.
fork/1	Clone the current process into two branches.
fork_exec/1	Fork (as fork/1) and exec (using exec/1) the child immediately.
kill/2	Deliver a software interrupt to the process with identifier Pid using software-interrupt number Signal.
pipe/2	Create a communication-pipe.
prctl/1	Access to Linux process control operations.
sysconf/1	Access system configuration.
wait/2	Wait for a child to change status.
uri.pl  -- Process URIs
iri_normalized/2	NormalizedIRI is the normalized form of IRI.
iri_normalized/3	NormalizedGlobalIRI is the normalized global version of IRI.
uri_authority_components/2	Break-down the authority component of a URI.
uri_authority_data/3	Provide access the uri_authority structure.
uri_components/2	Break a URI into its 5 basic components according to the RFC-3986 regular expression:.
uri_data/3	Provide access the uri_component structure.
uri_data/4	NewComponents is the same as Components with Field set to Data.
uri_encoded/3	Encoded is the URI encoding for Value.
uri_file_name/2	Convert between a URI and a local file_name.
uri_iri/2	Convert between a URI, encoded in US-ASCII and an IRI.
uri_is_global/1	True if URI has a scheme.
uri_normalized/2	NormalizedURI is the normalized form of URI.
uri_normalized/3	NormalizedGlobalURI is the normalized global version of URI.
uri_normalized_iri/2	As uri_normalized/2, but percent-encoding is translated into IRI Unicode characters.
uri_normalized_iri/3	NormalizedGlobalIRI is the normalized global IRI of URI.
uri_query_components/2	Perform encoding and decoding of an URI query string.
uri_resolve/3	Resolve a possibly local URI relative to Base.
url.pl  -- Analysing and constructing URL
utf8.pl  -- UTF-8 encoding/decoding on lists of character codes.
uuid.pl  -- Universally Unique Identifier (UUID) Library
uuid/1	UUID is an atom representing a new UUID.
varnumbers.pl  -- Utilities for numbered terms
max_var_number/3	True when Max is the max of Start and the highest numbered $VAR(N) term.
numbervars/1	Number variables in Term using $VAR(N).
varnumbers/2	Inverse of numbervars/1.
varnumbers/3	Inverse of numbervars/3.
varnumbers_names/3	If Term is a term with numbered and named variables using the reserved term '$VAR'(X), Copy is a copy of Term where each '$VAR'(X) is consistently replaced by a fresh variable and Bindings is a list X = Var, relating the X terms with the variable it is mapped to.
vm.pl  -- SWI-Prolog Virtual Machine utilities
clause_vm/2	True when VM is the virtual machine code of ClauseRef.
vm_list/1	Lists the definition of the predicates matching Spec to current_output.
vmi_labels/2	Translated between a raw and a labeled representation for a VMI sequence as produced by clause_vm/2.
wfs.pl  -- Well Founded Semantics interface
answer_residual/2	True when Goal resolves to a tabled predicate and Residual is the residual goal associated with an answer for Goal.
call_delays/2	True when Goal is true with Delays.
call_residual_program/2	Call Goal and return the full residual program as a list of Clauses.
delays_residual_program/2	Given a delay as returned by call_delays/2, produce a set of clauses the represents the complete residual program responsible for these delays, The program contains at least one loop through tnot/1 and is either inconsistent or has multiple models according to the stable model semantics.
when.pl  -- Conditional coroutining
when/2	Execute Goal when Condition is satisfied.
win_menu.pl  -- Console window menu
writef.pl  -- Old-style formatted write
www_browser.pl  -- Open a URL in the users browser
expand_url_path/2	Expand URL specifications similar to absolute_file_name/3.
known_browser/2	True if browser FileBaseName has a remote protocol compatible to Compatible.
www_open_url/1	Open URL in running version of the users' browser or start a new browser.
xmldsig.pl  -- XML Digital signature
xmld_signed_DOM/3	Translate an XML DOM structure in a signed version.
xmld_verify_signature/4	Confirm that an ds:Signature element contains a valid signature.
xmlenc.pl  -- XML encryption library
xpath.pl  -- Select nodes in an XML DOM
xpath/3	Match an element in a DOM structure.
xpath_chk/3	Semi-deterministic version of xpath/3.
xsdp_types.pl  -- XML-Schema primitive types
xsdp_convert/3	Convert the content model Content to an object of the given XSD type and return the Prolog value in Value.
xsdp_numeric_uri/2	Table mapping all XML-Schema numeric URIs into the type they promote to.
xsdp_subtype_of/2	True if Type is a (transitive) subtype of Super.
xsdp_type/1	Test/generate the names for the XML schema primitive types.
xsdp_uri_type/2	True if URI is the URI for the the XML-Schema primitive Type.
yall.pl  -- Lambda expressions
//2	Shorthand for Free/[]>>Lambda.
//3	Shorthand for Free/[]>>Lambda.
//4	Shorthand for Free/[]>>Lambda.
//5	Shorthand for Free/[]>>Lambda.
//6	Shorthand for Free/[]>>Lambda.
//7	Shorthand for Free/[]>>Lambda.
//8	Shorthand for Free/[]>>Lambda.
//9	Shorthand for Free/[]>>Lambda.
>>/2	Calls a copy of Lambda.
>>/3	Calls a copy of Lambda.
>>/4	Calls a copy of Lambda.
>>/5	Calls a copy of Lambda.
>>/6	Calls a copy of Lambda.
>>/7	Calls a copy of Lambda.
>>/8	Calls a copy of Lambda.
>>/9	Calls a copy of Lambda.
is_lambda/1	True if Term is a valid Lambda expression.
lambda_calls/2	Goal is the goal called if call/N is applied to LambdaExpression, where ExtraArgs are the additional arguments to call/N.
lambda_calls/3	Goal is the goal called if call/N is applied to LambdaExpression, where ExtraArgs are the additional arguments to call/N.
yaml.pl  -- Process YAML data
yaml_read/2	Parse Input to a YALM DOM.
yaml_write/2	Emit a YAML DOM object as a serialized YAML document to the stream Out.
yaml_write/3	Emit a YAML DOM object as a serialized YAML document to the stream Out.
zip.pl  -- Access resource ZIP archives
with_zipper/2	Run Goal while holding ownership over Zipper.
zip_close/1	Close a zipper.
zip_close/2	Close a zipper.
zip_open/4	Create a Zipper, providing access to File.
zipper_file_info/3	Obtain information about the current zip entry.
zipper_goto/2	Seek Zipper to a specified entry.
zipper_members/2	True when Members is the list of file names in the Zipper.
zipper_open_current/3	Open the current entry as an input stream.
zlib.pl  -- Zlib wrapper for SWI-Prolog
encoding_filter/3	Act as plugin for library(http/http_open) for processing content with Content-encoding: gzip.
gzopen/3	Open a file compatible with the gzip program.
gzopen/4	Open a file compatible with the gzip program.