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 if conjunction of results 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 a list, using arguments of the list as left argument.
foldl/5	Fold a list, using arguments of the list as left argument.
foldl/6	Fold a list, using arguments of the list as left argument.
foldl/7	Fold a list, using arguments of the list as left argument.
include/3	Filter elements for which Goal succeeds.
maplist/2	True if Goal can successfully be applied on all elements of List.
maplist/3	As maplist/2, operating on pairs of elements from two lists.
maplist/4	As maplist/2, operating on triples of elements from three lists.
maplist/5	As maplist/2, operating on quadruples of elements from four lists.
partition/4	Filter elements of List according to Pred.
partition/5	Filter List according to Pred in three sets.
scanl/4	Left scan of list.
scanl/5	Left scan of list.
scanl/6	Left scan of list.
scanl/7	Left scan of list.
apply_macros.pl  -- Goal expansion rules to avoid meta-calling
expand_phrase/2	Provide goal-expansion for PhraseGoal.
expand_phrase/4	Provide goal-expansion for PhraseGoal.
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
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
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 Seperator 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_pending_input/3
read_variables/2
read_variables/3
set_base_module/1	Set the default module from whic 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 wich call(Goal, Elem) succeeds.
substring/4	Predecessor of sub_string using 1-based Offset.
subsumes/2	True if Generic is unified to Specific without changing Specific.
subsumes_chk/2	True if Generic can be made equivalent to Specific without changing Specific.
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
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_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
chr.pl
debug_ask_continue/1	Hook to ask for a CHR debug continuation.
debug_event/2	Hook into the CHR debugger.
debug_interact/3	Hook into the CHR debugger to display Event and ask for the next command to execute.
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
crypt.pl
crypto.pl  -- Cryptography and authentication library
crypto_context_hash/2	Obtain the hash code of Context.
crypto_context_new/2	Context is unified with the empty context, taking into account Options.
crypto_curve_generator/2	Point is the generator of the elliptic curve Curve.
crypto_curve_order/2	Obtain the order of an elliptic curve.
crypto_curve_scalar_mult/4	R is the result of N times Point on the elliptic curve Curve.
crypto_data_context/3	Context0 is an existing computation context, and Context is the new context after hashing Data in addition to the previously hashed data.
crypto_data_decrypt/6	Decrypt the given CipherText, using the symmetric algorithm Algorithm, key Key, and initialization vector IV, to give PlainText.
crypto_data_encrypt/6	Encrypt the given PlainText, using the symmetric algorithm Algorithm, key Key, and initialization vector (or nonce) IV, to give CipherText.
crypto_data_hash/3	Hash is the hash of Data.
crypto_data_hkdf/4	Concentrate possibly dispersed entropy of Data and then expand it to the desired length.
crypto_file_hash/3	True if Hash is the hash of the content of File.
crypto_generate_prime/3	Generate a prime P with at least N bits.
crypto_is_prime/2	True iff P passes a probabilistic primality test.
crypto_modular_inverse/3	Compute the modular multiplicative inverse of the integer X.
crypto_n_random_bytes/2	Bytes is unified with a list of N cryptographically secure pseudo-random bytes.
crypto_name_curve/2	Obtain a handle for a named elliptic curve.
crypto_open_hash_stream/3	Open a filter stream on OrgStream that maintains a hash.
crypto_password_hash/2	If Hash is instantiated, the predicate succeeds iff the hash matches the given password.
crypto_password_hash/3	Derive Hash based on Password.
crypto_stream_hash/2	Unify Hash with a hash for the bytes sent to or read from HashStream.
ecdsa_sign/4	Create an ECDSA signature for Data with EC private key Key.
ecdsa_verify/4	True iff Signature can be verified as the ECDSA signature for Data, using the EC public key Key.
hex_bytes/2	Relation between a hexadecimal sequence and a list of bytes.
rsa_private_decrypt/4	RSA Public key encryption and decryption primitives.
rsa_private_encrypt/4	RSA Public key encryption and decryption primitives.
rsa_public_decrypt/4	RSA Public key encryption and decryption primitives.
rsa_public_encrypt/4	RSA Public key encryption and decryption primitives.
rsa_sign/4	Create an RSA signature for Data with private key Key.
rsa_verify/4	Verify an RSA signature for Data with public key Key.
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
date.pl  -- Process dates and times
date_time_value/3	Extract values from a date-time structure.
day_of_the_week/2	Computes the day of the week for a given date.
day_of_the_year/2	Computes the day of the year for a given date.
parse_time/2	Stamp is a timestamp created from parsing Text using the representation Format.
parse_time/3	Stamp is a timestamp created from parsing Text using the representation Format.
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
exists_source/1	True if Source (a term valid for load_files/2) exists.
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
dict_fill/4	Implementation for the dicts_to_same_keys/3 OnEmpty closure that fills new cells with a copy of ValueIn.
dict_keys/2	True when Keys is an ordered set of the keys appearing in Dict.
dicts_join/3	Join dicts in Dicts that have the same value for Key, provided they do not have conflicting values on other keys.
dicts_join/4	Join two lists of dicts (Dicts1 and Dicts2) on Key.
dicts_same_keys/2	True if List is a list of dicts that all have the same keys and Keys is an ordered set of these keys.
dicts_same_tag/2	True when List is a list of dicts that all have the tag Tag.
dicts_slice/3	DictsOut is a list of Dicts only containing values for Keys.
dicts_to_compounds/4	True when Dicts and Compounds are lists of the same length and each element of Compounds is a compound term whose arguments represent the values associated with the corresponding keys in Keys.
dicts_to_same_keys/3	DictsOut is a copy of DictsIn, where each dict contains all keys appearing in all dicts of DictsIn.
dif.pl  -- The dif/2 constraint
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
doc_latex/3	Process one or more objects, writing the LaTeX output to OutFile.
latex_for_file/3	Generate a LaTeX description of all commented predicates in File, writing the LaTeX text to the stream Out.
latex_for_predicates/3	Generate LaTeX for a list of predicate indicators.
latex_for_wiki_file/3	Write a LaTeX translation of a Wiki file to the steam Out.
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
editline.pl  -- BSD libedit based command line editing
el_add_history/2	Add a line to the command line history.
el_addfn/4	Add a new command to the command line editor associated with Input.
el_bind/2	Invoke the libedit bind command with the given arguments.
el_cursor/2	Move the cursor Move character forwards (positive) or backwards (negative).
el_deletestr/2	Delete Count characters before the cursor.
el_history/2	Perform a generic action on the history.
el_history_events/2	Unify Events with a list of pairs of the form Num-String, where Num is the event number and String is the associated string without terminating newline.
el_insertstr/2	Insert Text at the cursor.
el_line/2	Fetch the currently buffered input line.
el_read_history/2	Read the history saved using el_write_history/2.
el_setup/1	This hooks is called as forall(el_setup(Input), true) after the input stream has been wrapped, the default Prolog commands have been added and the default user setup file has been sourced using el_source/2.
el_source/2	Initialise editline by reading the contents of File.
el_unwrap/1	Remove the libedit wrapper for In and the related output and error streams.
el_wrap/0	Enable using editline on the standard user streams if user_input is connected to a terminal.
el_wrap/4	Enable editline on the stream-triple <In,Out,Error>.
el_wrapped/1	True if In is a stream wrapped by el_wrap/3.
el_write_history/2	Save editline history to File.
error.pl  -- Error generating support
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	Term is of the correct type and correct domain, but there is no existing (external) resource that is represented by it.
existence_error/3	Term is of the correct type and correct domain, but there is no existing (external) resource 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 Action on the object Term that is of the given Type.
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 Term is not of the expected Type.
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
fast_read/1	The next term is read from current standard input and is unified with Term.
fast_write/1	Output Term in a way that fast_read/1 and fast_read/2 will be able to read it back.
fast_write_to_string/3	Perform a fast-write to the difference-slist String\Tail.
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
gensym/2	Generate <Base>1, <Base>2, etc atoms on each subsequent call.
reset_gensym/0	Reset all gensym counters.
reset_gensym/1	Reset a specific gensym counter.
git.pl  -- Run GIT commands
git/2	Run a GIT command.
git_branches/2	True when Branches is the list of branches in the repository.
git_default_branch/2	True when BranchName is the default branch of a repository.
git_describe/2	Describe the running version based on GIT tags and hashes.
git_hash/2	Return the hash of the indicated object.
git_ls_remote/3	Execute git ls-remote against the remote repository to fetch references from the remote.
git_ls_tree/2	True when Entries is a list of entries in the the GIT repository, Each entry is a term:.
git_open_file/4	Open the file File in the given bare GIT repository on the given branch (treeisch).
git_process_output/3	Run a git-command and process the output with OnOutput, which is called as call(OnOutput, Stream).
git_remote_branches/2	Exploit git_ls_remote/3 to fetch the branches from a remote repository without downloading it.
git_remote_url/3	URL is the remote (fetch) URL for the given Remote.
git_shortlog/3	Fetch information like the GitWeb change overview.
git_show/4	Fetch info from a GIT commit.
git_tags_on_branch/3	Tags is a list of tags in Branch on the GIT repository Dir, most recent tag first.
is_git_directory/1	True if Directory is a git directory (Either checked out or bare).
hash_stream.pl  -- Maintain a hash on a stream
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
apropos/1	Print objects from the manual whose name or summary match with Query.
help/0	Show help for What.
help/1	Show help for What.
show_html_hook/1	Hook called to display the extracted HTML document.
hotfix.pl  -- Load hotfixes into executables
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 for the distance 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	ClassObject is a reference to a class object of Type.
jpl_classname_to_class/2	ClassName unambiguously represents a class, e.g.
jpl_classname_to_type/2	Classname is any of: a source-syntax (dotted) class name, e.g.
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_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	Incomplete types are now never cached (or otherwise passed around).
jpl_type_to_classname/2	Type, which is a class or array type (not sure about the others...), is denoted by ClassName in dotted syntax.
jpl_void/1	X is @(void), the JPL representation of the pseudo Java value 'void'.
lazy_lists.pl  -- Lazy list handling
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.
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.
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.
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 positon.
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
make.pl  -- Reload modified source files
make/0	Reload all source files that have been changed since they were loaded.
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
memfile.pl
modules.pl  -- Module utility predicates
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_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
pop_operators/0	Revert all changes to the operator table realised since the last push_operators/1.
pop_operators/1	Reset operators as pushed by push_operators/2.
push_op/3	As op/3, but this call must appear between push_operators/1 and pop_operators/0.
push_operators/1	Installs the operators from New, where New is a list of op(Prec, Type, :Name).
push_operators/2	Installs the operators from New, where New is a list of op(Prec, Type, :Name).
option.pl  -- Option list processing
dict_options/2	Convert between an option list and a dictionary.
merge_options/3	Merge two option lists.
meta_options/3	Perform meta-expansion on options that are module-sensitive.
option/2	Get an Option from OptionList.
option/3	Get an Option from OptionList.
select_option/3	Get and remove Option from an option list.
select_option/4	Get and remove Option with default value.
optparse.pl  -- command line parsing
opt_arguments/3	Extract commandline options according to a specification.
opt_help/2	True when Help is a help string synthesized from OptsSpec.
opt_parse/4	Equivalent to opt_parse(OptsSpec, ApplArgs, Opts, PositionalArgs, []).
opt_parse/5	Parse the arguments Args (as list of atoms) according to OptsSpec.
parse_type/3	Hook to parse option text Codes to an object of type Type.
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
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
pengines.pl  -- Pengines: Web Logic Programming Made Easy
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_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.
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
binding_term/5	Hook to render a Prolog result term as HTML.
message_lines_to_html/3	Helper that translates the Lines argument from user:message_hook/3 into an HTML string.
pengine_bind_io_to_html/1	Redefine the built-in predicates for IO to send HTML messages using pengine_output/1.
pengine_display/1	Redirect the corresponding Prolog output predicates.
pengine_flush_output/0	No-op.
pengine_format/1	As format/1,2.
pengine_format/2	As format/1,2.
pengine_io_predicate/1	True when Head describes the head of a (system) IO predicate that is redefined by the HTML binding.
pengine_listing/0	List the content of the current pengine or a specified predicate in the pengine.
pengine_listing/1	List the content of the current pengine or a specified predicate in the pengine.
pengine_nl/0	Emit a <br/> to the pengine.
pengine_print/1	Redirect the corresponding Prolog output predicates.
pengine_write/1	Redirect the corresponding Prolog output predicates.
pengine_write_canonical/1	Redirect the corresponding Prolog output predicates.
pengine_write_term/2	Writes term as <span class=Class>Term</span>.
pengine_writeln/1	Emit Term as <span class=writeln>Term<br></span>.
pengine_writeq/1	Redirect the corresponding Prolog output predicates.
show_html_hook/1	Hook into help/1 to render the help output in the SWISH console.
message_hook/3	Send output from print_message/2 to the pengine.
pengines_sandbox.pl  -- Declare Pengine interaction sandbox-safe
persistency.pl  -- Provide persistent dynamic predicates
pio.pl  -- Pure I/O
pldoc.pl  -- Process source documentation
doc_collect/1	Switch collecting comments true/false.
pldoc_loading/0	True if we are loading the PlDoc libraries.
tag_order/2	Hook that allows for defining additional tags.
plunit.pl  -- Unit Testing
begin_tests/1	Start a test-unit.
begin_tests/2	Start a test-unit.
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
portray_text/1	If true, write lists of character codes as "..." to simplify debugging.
set_portray_text/2	Set options for writing lists as strings.
pprint.pl  -- Pretty Print Prolog terms
predicate_options.pl  -- Access and analyse predicate options
process.pl  -- Create processes and redirect I/O
is_process/1	True if PID might be a process.
process_create/3	Create a new process running the file Exe and using arguments from the given list.
process_group_kill/1	Send signal to the group containing process PID.
process_group_kill/2	Send signal to the group containing process PID.
process_id/1	True if PID is the process id of the running Prolog process.
process_id/2	PID is the process id of Process.
process_kill/1	Send signal to process PID.
process_kill/2	Send signal to process PID.
process_release/1	Release process handle.
process_set_method/1	Determine how the process is created on Unix systems.
process_wait/2	True if PID completed with Status.
process_wait/3	True if PID completed with Status.
prolog_autoload.pl  -- Autoload all dependencies
autoload/0	Force all necessary autoloading to be done now.
autoload/1	Force all necessary autoloading to be done now.
prolog_breakpoints.pl  -- Manage Prolog break-points
prolog_clause.pl  -- Get detailed source-information about a clause
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.
prolog_colour.pl  -- Prolog syntax colouring support.
goal_classification/2	Multifile hookable classification for non-local goals.
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_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
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
cmake_qcompile/2	Qcompile on behalf of CMAKE installation.
cmake_save_man_index/0	Create swi('doc/manindex.db') during the build process.
qcompile_libraries/0	Quick-load compilation of the Prolog libraries.
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
environment/2	Hook to define the environment for building packs.
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.
prolog_server.pl
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
backtrace/1	Get and print a stacktrace to the user_error stream.
get_prolog_backtrace/2	Obtain a backtrace from the current location.
get_prolog_backtrace/3	Obtain a backtrace from the current location.
print_prolog_backtrace/2	Print a stacktrace in human readable form to Stream.
print_prolog_backtrace/3	Print a stacktrace in human readable form to Stream.
prolog_stack_frame_property/2	True when Property is a property of Frame.
stack_guard/1	Dynamic multifile hook that is normally not defined.
stack_guard/1	Dynamic multifile predicate.
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
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
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'.
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	interface to Unix.
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
is_rbtree/1	True if Term is a valide Red-Black tree.
list_to_rbtree/2	Tree is the red-black tree corresponding to the mapping in List, which should be a list of Key-Value pairs.
ord_list_to_rbtree/2	Tree is the red-black tree corresponding to the mapping in list List, which should be a list of Key-Value pairs.
rb_apply/4	If the value associated with key Key is Val0 in Tree, and if call(G,Val0,ValF) holds, then NewTree differs from Tree only in that Key is associated with value ValF in tree NewTree.
rb_clone/3	`Clone' the red-back tree TreeIn into a new tree TreeOut with the same keys as the original but with all values set to unbound values.
rb_del_max/4	Delete the largest element from the tree Tree, returning the key Key, the value Val associated with the key and a new tree NewTree.
rb_del_min/4	Delete the least element from the tree Tree, returning the key Key, the value Val associated with the key and a new tree NewTree.
rb_delete/3	Delete element with key Key from the tree Tree, returning the value Val associated with the key and a new tree NewTree.
rb_delete/4	Delete element with key Key from the tree Tree, returning the value Val associated with the key and a new tree NewTree.
rb_empty/1	Succeeds if Tree is an empty Red-Black tree.
rb_fold/4	Fold the given predicate over all the key-value pairs in Tree, starting with initial state State0 and returning the final state State.
rb_in/3	True when Key-Value is a key-value pair in red-black tree Tree.
rb_insert/4	Add an element with key Key and Value to the tree Tree creating a new red-black tree NewTree.
rb_insert_new/4	Add a new element with key Key and Value to the tree Tree creating a new red-black tree NewTree.
rb_keys/2	Keys is unified with an ordered list of all keys in the Red-Black tree Tree.
rb_lookup/3	True when Value is associated with Key in the Red-Black tree Tree.
rb_map/2	True if call(Goal, Value) is true for all nodes in T.
rb_map/3	For all nodes Key in the tree Tree, if the value associated with key Key is Val0 in tree Tree, and if call(G,Val0,ValF) holds, then the value associated with Key in NewTree is ValF.
rb_max/3	Key is the maximal key in Tree, and is associated with Val.
rb_min/3	Key is the minimum key in Tree, and is associated with Val.
rb_new/1	Create a new Red-Black tree Tree.
rb_next/4	Next is the next element after Key in Tree, and is associated with Val.
rb_partial_map/4	For all nodes Key in Keys, if the value associated with key Key is Val0 in tree Tree, and if call(G,Val0,ValF) holds, then the value associated with Key in NewTree is ValF.
rb_previous/4	Previous is the previous element after Key in Tree, and is associated with Val.
rb_size/2	Size is the number of elements in Tree.
rb_update/4	Tree NewTree is tree Tree, but with value for Key associated with NewVal.
rb_update/5	Tree NewTree is tree Tree, but with value for Key associated with NewVal.
rb_visit/2	Pairs is an infix visit of tree Tree, where each element of Pairs is of the form Key-Value.
rdf.pl
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
rdf_write_xml/2	Write an RDF/XML serialization of Triples to Out.
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.
rewrite.pl
rlimit.pl
saml.pl  -- SAML Authentication
sandbox.pl  -- Sandboxed Prolog code
sandbox_allowed_directive/1	Throws an exception if G is not considered a safe directive.
sandbox_allowed_expansion/1	Throws an exception if G is not considered a safe expansion goal.
sandbox_allowed_goal/1	Throw an exception if it is not safe to call G.
safe_call/1	Call Goal if it complies with the sandboxing rules.
safe_directive/1	Hook to declare additional directives as safe.
safe_global_variable/1	Declare the given global variable safe to write to.
safe_goal/1	True if calling Goal provides no security risc.
safe_meta/2	Hook.
safe_primitive/1	True if Goal is safe to call (i.e., cannot access dangerous system-resources and cannot upset other parts of the Prolog process).
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.
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
cd/0	Change working directory.
cd/1	Change working directory.
dirs/0	Manage the directory stack:.
ls/0	Listing similar to Unix =ls -F=, flagging directories with =/=.
ls/1	Listing similar to Unix =ls -F=, flagging directories with =/=.
mv/2	Move (Rename) a file.
popd/0	Manage the directory stack:.
pushd/0	Manage the directory stack:.
pushd/1	Manage the directory stack:.
pwd/0	Print current working directory.
rm/1	Remove (unlink) a file.
shell/0	Execute an interactive shell.
shlib.pl  -- Utility library for loading foreign objects (DLLs, shared objects)
compat_arch/2	User definable hook to establish if Arch1 is compatible with Arch2 when running a shared object.
current_foreign_library/2	Query currently loaded shared libraries.
load_foreign_library/1	Load a shared object or DLL.
load_foreign_library/2	Load a shared object or DLL.
reload_foreign_libraries/0	Reload all foreign libraries loaded (after restore of a state created using qsave_program/2.
unload_foreign_library/1	Unload a shared object or DLL.
unload_foreign_library/2	Unload a shared object or DLL.
use_foreign_library/1	Load and install a foreign library as load_foreign_library/1,2 and register the installation using initialization/2 with the option now.
use_foreign_library/2	Load and install a foreign library as load_foreign_library/1,2 and register the installation using initialization/2 with the option now.
win_add_dll_directory/1	Add AbsDir to the directories where dependent DLLs are searched on Windows systems.
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.
load_certificate/2	Loads a certificate from a PEM- or DER-encoded stream, returning a term which will unify with the same certificate if presented in cert_verify_hook.
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.
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_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.
system_root_certificates/1	List is a list of trusted root certificates as provided by the OS.
statistics.pl  -- Get information about resource usage
profile/1	Run Goal under the execution profiler.
profile/2	Run Goal under the execution profiler.
show_profile/1	Display last collected profiling data.
statistics/0	Print information about resource usage using print_message/2.
statistics/1	Stats is a dict representing the same information as statistics/0.
thread_statistics/2	Obtain statistical information about a single thread.
time/1	Execute Goal, reporting statistics to the user.
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.
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
table.pl
table_util.pl
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 cover analysis
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
concurrent/3	Run Goals in parallel using N threads.
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.
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.
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
ugraphs.pl  -- Graph manipulation library
compose/3	Calculates the composition of two S-form graphs, which need not have the same set of vertices.
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	Edges is the set of edges in UGraph.
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.
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.
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	Is true when Union is the union of Set1 and Set2.
vertices/2	Strips off the neighbours lists of an S-representation to produce a list of the vertices of the graph.
vertices_edges_to_ugraph/3	Create a UGraph from Vertices and edges.
uid.pl  -- User and group management on Unix systems
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
file_name_to_url/2	Translate between a filename and a file:// URL.
global_url/3	Translate a possibly relative URL into an absolute one.
http_location/2	Construct or analyze an HTTP location.
is_absolute_url/1	True if URL is an absolute URL.
parse_url/2	Construct or analyse a URL.
parse_url/3	Similar to parse_url/2 for relative URLs.
parse_url_search/2	Construct or analyze an HTTP search specification.
set_url_encoding/2	Query and set the encoding for URLs.
url_iri/2	Convert between a URL, encoding in US-ASCII and an IRI.
www_form_encode/2	En/decode to/from application/x-www-form-encoded.
utf8.pl  -- UTF-8 encoding/decoding on lists of character codes.
utf8_codes/3	DCG translating between a Unicode code-list and its UTF-8 encoded byte-string.
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
vm_list/1	Lists the definition of the predicates matching Spec to current_output.
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
swritef/2	Use writef/1 or writef/2 and write the result to a string.
swritef/3	Use writef/1 or writef/2 and write the result to a string.
writef/1	Formatted write to the current_output.
writef/2	Formatted write to the current_output.
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
decrypt_xml/4
load_certificate_from_base64_string/2	Loads a certificate from a string, adding newlines and header where appropriate so that OpenSSL 1.0.1+ will be able to parse it.
xpath.pl  -- Select nodes in an XML DOM
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_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.