library

Prolog files

aggregate.pl  -- Aggregation operators on backtrackable predicates
ansi_term.pl
ansi_format/3	Format text with ANSI attributes.
ansi_get_color/2	Obtain the RGB color for an ANSI color parameter.
ansi_hyperlink/2	Create a hyperlink for a terminal emulator.
ansi_hyperlink/3	Create a hyperlink for a terminal emulator.
tty_url_hook/2	Hook for location_url/2.
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
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
apply_macros_sentinel/0	Used to detect that library(apply_macros) is loaded into the current context explicitly.
expand_phrase/2	Provide goal-expansion for PhraseGoal.
expand_phrase/4	Provide goal-expansion for PhraseGoal.
arithmetic.pl
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
atom.pl
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
$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.
$sig_atomic/1	Execute Goal without processing signals.
$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.
call_cleanup/3	Call Cleanup with an indication of the reason unified to Catcher.
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
base32/2	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
broadcast.pl
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.
charsio.pl
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
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.
codesio.pl  -- I/O on Lists of Character Codes
coinduction.pl
coinductive/1	The declaration :- coinductive name/arity, ... defines predicates as coinductive.
csv.pl
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
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
dialect.pl  -- Support multiple Prolog dialects
dicts.pl
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.
dict_size/2	True when KeyCount is the number of keys 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.
mapdict/2	True when all dicts have the same set of keys and call(Goal, Key, V1, ...) is true for all keys in the dicts.
mapdict/3	True when all dicts have the same set of keys and call(Goal, Key, V1, ...) is true for all keys in the dicts.
mapdict/4	True when all dicts have the same set of keys and call(Goal, Key, V1, ...) is true for all keys in the dicts.
dif.pl  -- The dif/2 constraint
edinburgh.pl  -- Some traditional Edinburgh predicates
edit.pl  -- Editor interface
error.pl
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.
exceptions.pl
catch/4	As catch/3, only catching exceptions for which exception(ErrorType,Ball) is true.
error_term/2	Describe the formal part of error(Formal,ImplDefined) exceptions.
exception/2	If Ball is unbound, adds a delayed goal that tests the error belongs to Type when Ball is instantiated (by catch/3).
exception_term/2	Describe exceptions that are not error(Formal, _) terms.
exception_type/2	Declare all exceptions subsumed by Term to be an exception of Type.
explain.pl  -- Describe Prolog Terms
gensym.pl
gensym/2	Generate <Base>1, <Base>2, etc atoms on each subsequent call.
reset_gensym/0	Reset gensym for all registered keys.
reset_gensym/1	Restart generation of identifiers from Base at <Base>1.
git.pl
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 current branch of a 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/2	True when Tags is a list of git tags defined on the repository.
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).
is_git_hash/1	True when Atom represents a GIT hash, i.e., a 40 digit hexadecimal string.
hashtable.pl
ht_del/3	Delete Key-Value from HT.
ht_gen/3	True when Key-Value is in HT.
ht_get/3	True when Key is in HT and associated with Value.
ht_is_hashtable/1	True when HT is a hash table.
ht_keys/2	True when Keys is an ordered set of all keys in HT.
ht_new/1	Create a new hash table.
ht_pairs/2	True when Pairs and HT represent the same association.
ht_put/3	Add a Key-Value to HT.
ht_put/5	Add Key-Value to HT.
ht_put_new/3	As ht_put/3, but fails if Key is already in HT instead of updating the associated value.
ht_size/2	True when Size is the number of key-value pairs in HT.
ht_update/4	True when HT holds Key-Old before and Key-New after this call.
heaps.pl
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
increval.pl
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/3	Run Goal as call/1.
intercept/4	Similar to intercept/3, but the copy of Handler is called as call(Copy,Arg), which allows passing large context arguments or arguments subject to unification or destructive assignment.
intercept_all/4	True when List contains all instances of Template that have been sent using send_signal/1 where the argument unifies with Ball.
nb_intercept_all/4	As intercept_all/4, but backtracing inside Goal does not reset List.
send_signal/1	If this predicate is called from a sub-goal of intercept/3, execute the associated Handler of the intercept/3 environment.
send_silent_signal/1	As send_signal/1, but succeed silently if there is no matching intercept environment.
iostream.pl  -- Utilities to deal with streams
lazy_lists.pl
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
lists.pl  -- List Manipulation
main.pl  -- Provide entry point for scripts
make.pl  -- Reload modified source files
modules.pl  -- Module utility predicates
nb_set.pl  -- Non-backtrackable sets
occurs.pl  -- Finding and counting sub-terms
operators.pl  -- Manage operators
option.pl
dict_options/2	Convert between an option list and a dictionary.
merge_options/3	Merge two option sets.
meta_options/3	Perform meta-expansion on options that are module-sensitive.
option/2	Get an Option from Options.
option/3	Get an Option from Options.
select_option/3	Get and remove Option from Options.
select_option/4	Get and remove Option with default value.
optparse.pl  -- command line parsing
ordsets.pl
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
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.
persistency.pl  -- Provide persistent dynamic predicates
pio.pl  -- Pure I/O
portray_text.pl
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
print_term/2	Pretty print a Prolog term.
predicate_options.pl
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.
prolog_autoload.pl  -- Autoload all dependencies
prolog_breakpoints.pl  -- Manage Prolog break-points
prolog_clause.pl
prolog_code.pl
body_term_calls/2	True when BodyTerm calls Goal.
comma_list/2	True if CommaList is a nested term over the ','/2 (';'/2) functor and List is a list expressing the elements of the conjunction.
extend_goal/3	Extend the possibly qualified Goal0 with additional arguments from Extra.
head_name_arity/3	Similar to functor/3, but deals with SWI-Prolog's zero-argument callable terms and avoids creating a non-callable term if Name is not an atom and Arity is zero.
is_control_goal/1	True if Goal is a compiled Prolog control structure.
is_predicate_indicator/1	True when Term is a predicate indicator.
mkconj/3	Create a conjunction or disjunction from two terms.
mkdisj/3	Create a conjunction or disjunction from two terms.
most_general_goal/2	General is the most general version of Goal.
pi_head/2	Translate between a PredicateIndicator and a Goal term.
predicate_label/2	Create a human-readable label for the given predicate indicator.
predicate_sort_key/2	Key is the (module-free) name of the predicate for sorting purposes.
semicolon_list/2	True if CommaList is a nested term over the ','/2 (';'/2) functor and List is a list expressing the elements of the conjunction.
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_config.pl
prolog_config/2	Get information on the configuration of the current Prolog system.
prolog_dump_runtime_variables/0	Dump the current configuration in shell format.
prolog_coverage.pl
cov_load_data/2	Reload coverage data from File.
cov_property/1	True when coverage analysis satisfies Property.
cov_reset/0	Discard all collected coverage data.
cov_save_data/2	Save the coverage information to File.
coverage/1	As call(Goal), collecting coverage information while Goal is running.
coverage/2	Collect and optionally report coverage by Goal.
report_hook/2	This hook is called after the data collection.
show_coverage/1	Show collected coverage data.
prolog_debug.pl  -- User level debugging tools
prolog_format.pl  -- Analyse format specifications
prolog_jiti.pl  -- Just In Time Indexing (JITI) utilities
prolog_metainference.pl  -- Infer meta-predicate properties
prolog_pack.pl  -- A package manager for Prolog
prolog_profile.pl  -- Execution profiler
prolog_source.pl
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_file_directives/3	True when Directives is a list of directives that appear in the source file File.
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.
valid_term_position/2	Check that a Term has an appropriate TermPos layout.
prolog_stack.pl
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_last_choicepoint/0	Print details on the last open choice point.
print_last_choicepoint/2
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_trace.pl
list_tracing/0	List predicates we are currently tracing.
notraceall/0	Remove all trace points.
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_versions.pl
cmp_versions/3	Compare to versions.
require_prolog_version/2	Claim that the running Prolog version is at least version Required and provides the requested Features.
require_version/3	Require Component to have version CmpRequired, while Component is know to have version Available.
prolog_wrap.pl
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
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.
pure_input.pl  -- Pure Input from files and streams
quasi_quotations.pl  -- Define Quasi Quotation syntax
quintus.pl
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.
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
rbtrees.pl  -- Red black trees
readln.pl
readutil.pl  -- Read utilities
record.pl  -- Access compound arguments by name
rwlocks.pl
with_rwlock/3	Run Goal, synchronized with LockId in ModeSpec.
with_rwlock/4	Run Goal, synchronized with LockId in ModeSpec.
sandbox.pl
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.
format_calls/3	Find ~@ calls from Format and Args.
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).
safe_prolog_flag/2	True if it is safe to set the flag Flag to Value.
settings.pl
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.
shell.pl
cd/0	Change working directory.
cd/1	Change working directory.
dirs/0	Manage the directory stack:.
file_style/2	True when File should be listed as a terminal hyperlink.
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)
solution_sequences.pl  -- Modify solution sequences
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).
statistics.pl
call_time/2	Call Goal as call/1, unifying Time with a dict that provides information on the resource usage.
call_time/3	Call Goal as call/1, unifying Time with a dict that provides information on the resource usage.
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.
streams.pl
with_output_to/3	Run Goal and once/1 while capturing all output to all streams (current_output, user_output and user_error) in the string Output.
strings.pl  -- String utilities
system.pl  -- System utilities
tables.pl  -- XSB interface to tables
terms.pl
foldsubterms/4	The predicate foldsubterms/5 calls call(Goal4, SubTerm1, SubTerm2, StateIn, StateOut) for each subterm, including variables, in Term1.
foldsubterms/5	The predicate foldsubterms/5 calls call(Goal4, SubTerm1, SubTerm2, StateIn, StateOut) for each subterm, including variables, in Term1.
mapargs/3	Term1 and Term2 have the same functor (name/arity) and for each matching pair of arguments call(Goal, A1, A2) is true.
mapsubterms/3	Recursively map sub terms of Term1 into subterms of Term2 for every pair for which call(Goal, ST1, ST2) succeeds.
mapsubterms_var/3	Recursively map sub terms of Term1 into subterms of Term2 for every pair for which call(Goal, ST1, ST2) succeeds.
same_functor/2	True when Term1 and Term2 are terms that have the same functor (Name/Arity).
same_functor/3	True when Term1 and Term2 are terms that have the same functor (Name/Arity).
same_functor/4	True when Term1 and Term2 are terms that have the same functor (Name/Arity).
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.
term_factorized/3	Is true when Skeleton is Term where all subterms that appear multiple times are replaced by a variable and Substitution is a list of Var=Value that provides the subterm at the location Var.
term_size/2	True if Size is the size in cells occupied by Term on the global (term) stack.
term_subsumer/3	General is the most specific term that is a generalisation of Special1 and Special2.
variant/2	Same as SWI-Prolog Term1 =@= Term2.
thread.pl  -- High level thread primitives
thread_pool.pl  -- Resource bounded thread management
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.
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.
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.
with_stopped_threads/2	Stop all threads except the caller while running once(Goal).
ugraphs.pl  -- Graph manipulation library
url.pl
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.
varnumbers.pl  -- Utilities for numbered terms
wfs.pl
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
when/2	Execute Goal when Condition is satisfied.
writef.pl
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
yall.pl
//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.
zip.pl
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.