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see.pl
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see.pl
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% ---------------------------------
% Second Eye of Euler -- Jos De Roo
% ---------------------------------
%
% See https://github.com/KNowledgeOnWebScale/see-lingua
%
:- use_module(library(lists)).
:- use_module(library(gensym)).
:- use_module(library(system)).
:- use_module(library(terms)).
:- use_module(library(url)).
:- use_module(library(charsio)).
:- use_module(library(base64)).
:- use_module(library(date)).
:- use_module(library(sha)).
:- use_module(library(dif)).
:- use_module(library(pcre)).
:- use_module(library(semweb/turtle)).
:- catch(use_module(library(http/http_open)), _, true).
version_info('SEE v1.1.5 (2024-03-28)').
help_info('Usage: see <options>* <data>*
<options>
--genid <genid> use <genid> in Skolem IRIs
--help show help info
--output <file> write reasoner output to <file>
--version show version info
--wcache <uri> <file> to tell that <uri> is cached as <file>
<data>
<uri> TriG data').
:- dynamic(answer/3). % answer(Predicate, Subject, Object)
:- dynamic(apfx/2).
:- dynamic(base_uri/1).
:- dynamic(brake/0).
:- dynamic(cc/1).
:- dynamic(cpred/1).
:- dynamic(exopred/3). % exopred(Predicate, Subject, Object)
:- dynamic(flag/2).
:- dynamic(fpred/1).
:- dynamic(graph/2).
:- dynamic(hash_value/2).
:- dynamic(implies/2). % implies(Premise, Conclusion)
:- dynamic(keep_ng/1).
:- dynamic(keep_skolem/1).
:- dynamic(mtime/2).
:- dynamic(ncllit/0).
:- dynamic(ns/2).
:- dynamic(pfx/2).
:- dynamic(pred/1).
:- dynamic(quad/4).
:- dynamic(recursion/1).
:- dynamic(rule_uvar/1).
:- dynamic(scope/1).
:- dynamic(tuple/2).
:- dynamic(tuple/3).
:- dynamic(tuple/4).
:- dynamic(tuple/5).
:- dynamic(tuple/6).
:- dynamic(tuple/7).
:- dynamic(tuple/8).
:- dynamic(unify/2).
:- dynamic(uuid/2).
:- dynamic(wcache/2).
:- dynamic(wpfx/1).
:- dynamic(wtcache/2).
:- dynamic('<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>'/2).
:- dynamic('<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>'/2).
:- dynamic('<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>'/2).
:- dynamic('<http://www.w3.org/2000/01/rdf-schema#subClassOf>'/2).
:- dynamic('<http://www.w3.org/2000/10/swap/lingua#hornb>'/2).
:- dynamic('<http://www.w3.org/2000/10/swap/lingua#implication>'/2).
:- dynamic('<http://www.w3.org/2000/10/swap/lingua#nand>'/2).
:- dynamic('<http://www.w3.org/2000/10/swap/lingua#query>'/2).
:- dynamic('<http://www.w3.org/2000/10/swap/log#callWithCleanup>'/2).
:- dynamic('<http://www.w3.org/2000/10/swap/log#collectAllIn>'/2).
:- dynamic('<http://www.w3.org/2000/10/swap/log#implies>'/2).
%
% Main goal
%
main(Argv) :-
set_prolog_flag(argv, Argv),
catch(run, Exc,
( Exc = halt(_)
-> true
; throw(Exc)
)
).
main :-
catch(run, Exc,
( Exc = halt(EC)
-> halt(EC)
; throw(Exc)
)
).
run :-
nb_setval(fm, 0),
nb_setval(mf, 0),
catch(set_stream(user_output, encoding(utf8)), _, true),
current_prolog_flag(argv, Argv),
( append(_, ['--'|Argvp], Argv)
-> true
; Argvp = Argv
),
argv(Argvp, Argus),
catch(gre(Argus), Exc,
( Exc = halt(0)
-> true
; format(user_error, '** ERROR ** gre ** ~w~n', [Exc]),
flush_output(user_error),
nb_setval(exit_code, 3)
)
),
nb_getval(fm, Fm),
( Fm = 0
-> true
; format(user_error, '*** fm=~w~n', [Fm]),
flush_output(user_error)
),
nb_getval(mf, Mf),
( Mf = 0
-> true
; format(user_error, '*** mf=~w~n', [Mf]),
flush_output(user_error)
),
nb_getval(exit_code, EC),
flush_output,
throw(halt(EC)).
argv([], []) :-
!.
argv([Arg|Argvs], [U, V|Argus]) :-
sub_atom(Arg, B, 1, E, '='),
sub_atom(Arg, 0, B, _, U),
memberchk(U, ['--output', '--genid']),
!,
sub_atom(Arg, _, E, 0, V),
argv(Argvs, Argus).
argv([Arg|Argvs], [Arg|Argus]) :-
argv(Argvs, Argus).
% ------------------------------
% GRE (Generic Reasoning Engine)
% ------------------------------
gre(Argus) :-
nb_setval(exit_code, 0),
nb_setval(indentation, 0),
nb_setval(limit, -1),
nb_setval(tuple, -1),
nb_setval(fdepth, 0),
nb_setval(pdepth, 0),
nb_setval(cdepth, 0),
nb_setval(wn, 0),
nb_setval(doc_nr, 0),
opts(Argus, Args),
( Args = []
-> opts(['--help'], _)
; true
),
( flag('genid', Genid)
-> true
; uuid(Genid)
),
atomic_list_concat(['http://eyereasoner.github.io/.well-known/genid/', Genid, '#'], Sns),
nb_setval(var_ns, Sns),
put_pfx('skolem', Sns),
put_pfx('var', 'http://www.w3.org/2000/10/swap/var#'),
args(Args),
% create named graphs
( quad(_, _, _, G),
findall(C,
( retract(quad(S, P, O, G)),
C =.. [P, S, O]
),
D
),
D \= [],
conjoin(D, E),
assertz(graph(G, E)),
fail
; true
),
% move rdf lists
( graph(A, B),
conj_list(B, C),
relist(C, D),
conj_list(E, D),
E \= B,
retract(graph(A, B)),
assertz(graph(A, E)),
fail
; true
),
% create terms
( pred(P),
P \= '<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>',
P \= '<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>',
X =.. [P, _, _],
call(X),
getterm(X, Y),
( Y = X
-> true
; retract(X),
assertz(Y)
),
fail
; true
),
% remove rdf lists
retractall('<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>'(_, _)),
retractall('<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>'(_, _)),
% create forward rules
assertz(implies((
'<http://www.w3.org/2000/10/swap/lingua#implication>'(A, B),
findvars([A, B], V, alpha),
list_to_set(V, U),
makevars([A, B, U], [Q, I, X], beta(U)),
( Q \= true,
I \= false
-> conj_append(I, answer('<http://www.w3.org/2000/10/swap/lingua#explanation>', Q, I), F)
; F = I
)), '<http://www.w3.org/2000/10/swap/log#implies>'(Q, F))),
% create backward rules
assertz(implies((
'<http://www.w3.org/2000/10/swap/lingua#hornb>'(B, A),
findvars([A, B], V, alpha),
list_to_set(V, U),
makevars([A, B, U], [Q, I, X], beta(U)),
( Q \= true
-> conj_append(Q, remember(answer('<http://www.w3.org/2000/10/swap/lingua#explanation>', Q, I)), F)
; F = Q
),
C = ':-'(I, F),
copy_term_nat(C, CC),
labelvars(CC, 0, _, avar),
( \+cc(CC)
-> assertz(cc(CC)),
assertz(C),
retractall(brake)
; true
)), true)),
% create queries
assertz(implies((
'<http://www.w3.org/2000/10/swap/lingua#query>'(A, B),
( A \= B
-> F = ('<http://www.w3.org/2000/10/swap/lingua#explanation>'(A, B), B)
; F = B
),
djiti_answer(answer(F), J),
findvars([A, F], V, alpha),
list_to_set(V, U),
makevars([A, J, U], [Q, I, X], beta(U)),
C = implies(Q, I),
copy_term_nat(C, CC),
labelvars(CC, 0, _, avar),
( \+cc(CC)
-> assertz(cc(CC)),
assertz(C),
retractall(brake)
; true
)), true)),
% create universal statements
( pred(P),
\+atom_concat('<http://www.w3.org/2000/10/swap/', _, P),
X =.. [P, _, _],
call(X),
findvars(X, V, alpha),
V \= [],
list_to_set(V, U),
makevars(X, Y, beta(U)),
retract(X),
assertz(Y),
fail
; true
),
% simplify negative surface
assertz(implies((
'<http://www.w3.org/2000/10/swap/lingua#nand>'(V, G),
getlist(V, Vl),
is_list(Vl),
is_graph(G),
conj_list(G, L),
list_to_set(L, B),
select('<http://www.w3.org/2000/10/swap/lingua#nand>'(Z, H), B, K),
getlist(Z, Zl),
is_list(Zl),
is_graph(H),
conj_list(H, M),
list_to_set(M, T),
select('<http://www.w3.org/2000/10/swap/lingua#nand>'(W, O), T, N),
getlist(W, Wl),
is_list(Wl),
is_graph(O),
( conj_list(O, D),
append(K, D, E),
conj_list(C, E)
; length(K, I),
I > 1,
conj_list(F, N),
conj_list(C, ['<http://www.w3.org/2000/10/swap/lingua#nand>'([], F)|K])
),
findvars(H, R, beta),
intersection(Zl, R, X),
findvars(O, S, beta),
intersection(Wl, S, Y),
append([Vl, X, Y], U)
), '<http://www.w3.org/2000/10/swap/lingua#nand>'(U, C))),
% resolve negative surfaces
assertz(implies((
'<http://www.w3.org/2000/10/swap/lingua#nand>'(V, G),
getlist(V, Vl),
is_list(Vl),
is_graph(G),
conj_list(G, L),
list_to_set(L, B),
findall(1,
( member('<http://www.w3.org/2000/10/swap/lingua#nand>'(_, _), B)
),
O
),
length(O, E),
length(B, D),
memberchk(E, [0, 2, D]),
'<http://www.w3.org/2000/10/swap/lingua#nand>'(W, F),
getlist(W, Wl),
is_list(Wl),
is_graph(F),
conj_list(F, K),
list_to_set(K, N),
length(N, 2),
makevars(N, J, beta(Wl)),
select('<http://www.w3.org/2000/10/swap/lingua#nand>'(U, C), J, [P]),
getlist(U, Ul),
is_list(Ul),
is_graph(C),
( select('<http://www.w3.org/2000/10/swap/lingua#nand>'(Z, Q), B, A),
M = ['<http://www.w3.org/2000/10/swap/lingua#nand>'(Ul, C)|A],
conj_list(Q, R),
memberchk(P, R)
; select(Q, B, A),
M = [P|A],
conj_list(C, R),
memberchk(Q, R)
),
list_to_set(M, T),
conj_list(H, T),
ground('<http://www.w3.org/2000/10/swap/lingua#nand>'(Vl, H))
), '<http://www.w3.org/2000/10/swap/lingua#nand>'(Vl, H))),
% convert negative surfaces to forward rules
assertz(implies((
'<http://www.w3.org/2000/10/swap/lingua#nand>'(V, G),
getlist(V, Vl),
is_list(Vl),
is_graph(G),
conj_list(G, L),
list_to_set(L, B),
select('<http://www.w3.org/2000/10/swap/lingua#nand>'(_, H), B, K),
conj_list(R, K),
makevars([R, H], [Q, S], alpha(Vl)),
findvars(S, W, beta),
makevars(S, I, alpha(W))
), '<http://www.w3.org/2000/10/swap/lingua#implication>'(Q, I))),
% convert negative surfaces to forward contrapositive rules
assertz(implies((
'<http://www.w3.org/2000/10/swap/lingua#nand>'(V, G),
getlist(V, Vl),
is_list(Vl),
is_graph(G),
conj_list(G, L),
list_to_set(L, B),
\+member(exopred(_, _, _), B),
( length(B, O),
O =< 2
-> select(R, B, J),
J \= []
; B = [R|J]
),
conj_list(T, J),
findvars(R, N, beta),
findall(A,
( member(A, Vl),
\+member(A, N)
),
Z
),
E = '<http://www.w3.org/2000/10/swap/lingua#nand>'(Z, T),
makevars([R, E], [Q, S], alpha(Vl)),
findvars(S, W, beta),
makevars(S, I, alpha(W))
), '<http://www.w3.org/2000/10/swap/lingua#implication>'(Q, I))),
% convert negative surfaces to universal statements
assertz(implies((
'<http://www.w3.org/2000/10/swap/lingua#nand>'(V, G),
getlist(V, Vl),
is_list(Vl),
Vl \= [],
is_graph(G),
conj_list(G, [G]),
( G = '<http://www.w3.org/2000/10/swap/lingua#nand>'(Z, H)
-> true
; Z = [],
H = '<http://www.w3.org/2000/10/swap/lingua#nand>'([], G)
),
findvars(H, R, beta),
intersection(Z, R, X),
conj_list(H, B),
member(M, B),
findall('<http://www.w3.org/2000/10/swap/log#skolem>'(Vl, W),
( member(W, X)
),
Y
),
conj_list(S, Y),
append(Vl, X, U),
makevars([M, S], [Q, I], alpha(U))
), '<http://www.w3.org/2000/10/swap/lingua#hornb>'(Q, I))),
% blow inference fuse
assertz(implies((
'<http://www.w3.org/2000/10/swap/lingua#nand>'(V, G),
call((
getlist(V, Vl),
is_list(Vl),
is_graph(G),
conj_list(G, L),
makevars(G, H, beta(Vl)),
( H = '<http://www.w3.org/2000/10/swap/lingua#nand>'(_, false),
J = true
; catch(call(H), _, false),
J = H
),
( H = '<http://www.w3.org/2000/10/swap/lingua#nand>'(_, C)
-> I = '<http://www.w3.org/2000/10/swap/lingua#nand>'(_, C)
; I = H
)
)),
J,
'<http://www.w3.org/2000/10/swap/lingua#nand>'(_, I)
), false)),
% set engine values
findall(Sc,
( scope(Sc)
),
Scope
),
nb_setval(scope, Scope),
nb_setval(rn, 0),
nb_setval(keep_ng, true),
% run engine
catch(eam(0), Exc3,
( ( Exc3 = halt(0)
-> true
; format(user_error, '** ERROR ** eam ** ~w~n', [Exc3]),
flush_output(user_error),
( Exc3 = inference_fuse(_)
-> nb_setval(exit_code, 2)
; nb_setval(exit_code, 3)
)
)
)
).
%
% command line options
%
opts([], []) :-
!.
opts(['--genid', Genid|Argus], Args) :-
!,
retractall(flag('genid', _)),
assertz(flag('genid', Genid)),
opts(Argus, Args).
opts(['--help'|_], _) :-
!,
help_info(Help),
format(user_error, '~w~n', [Help]),
flush_output(user_error),
throw(halt(0)).
opts(['--output', File|Argus], Args) :-
!,
retractall(flag('output', _)),
open(File, write, Out, [encoding(utf8)]),
tell(Out),
assertz(flag('output', Out)),
opts(Argus, Args).
opts(['--version'|_], _) :-
!,
version_info(Version),
format(user_error, '~w~n', [Version]),
flush_output(user_error),
throw(halt(0)).
opts(['--wcache', Argument, File|Argus], Args) :-
!,
absolute_uri(Argument, Arg),
retractall(wcache(Arg, _)),
assertz(wcache(Arg, File)),
opts(Argus, Args).
opts([Arg|_], _) :-
\+memberchk(Arg, ['--help']),
sub_atom(Arg, 0, 2, _, '--'),
!,
throw(not_supported_option(Arg)).
opts([Arg|Argus], [Arg|Args]) :-
opts(Argus, Args).
args([]) :-
!.
args([Argument|Args]) :-
!,
absolute_uri(Argument, Arg),
atomic_list_concat(['<', Arg, '>'], R),
assertz(scope(R)),
cnt(doc_nr),
( wcacher(Arg, File)
-> open(File, read, In, [encoding(utf8)])
; ( ( sub_atom(Arg, 0, 5, _, 'http:')
-> true
; sub_atom(Arg, 0, 6, _, 'https:')
)
-> http_open(Arg, In, []),
set_stream(In, encoding(utf8))
; ( sub_atom(Arg, 0, 5, _, 'file:')
-> ( parse_url(Arg, Parts)
-> memberchk(path(File), Parts)
; sub_atom(Arg, 7, _, 0, File)
)
; File = Arg
),
( File = '-'
-> In = user_input
; open(File, read, In, [encoding(utf8)])
)
)
),
retractall(base_uri(_)),
( Arg = '-'
-> absolute_uri('', Abu),
assertz(base_uri(Abu))
; assertz(base_uri(Arg))
),
rdf_read_turtle(stream(In), Triples, [base_uri(Arg), format(trig), prefixes(Pfxs), on_error(error)]),
close(In),
forall(
member(Pfx-Ns, Pfxs),
put_pfx(Pfx, Ns)
),
( Arg = '-'
-> D = '#'
; atomic_list_concat([Arg, '#'], D)
),
put_pfx('', D),
forall(
member(rdf(S, P, O), Triples),
( trig_term(S, Subject),
trig_term(P, Predicate),
trig_term(O, Object),
Triple =.. [Predicate, Subject, Object],
djiti_assertz(Triple)
)
),
forall(
member(rdf(S, P, O, G), Triples),
( trig_term(S, Subject),
trig_term(P, Predicate),
trig_term(O, Object),
G = H:_,
trig_term(H, Graph),
assertz(quad(Subject, Predicate, Object, Graph))
)
),
args(Args).
trig_term(literal(type(A, B)), C) :-
memberchk(A, ['http://www.w3.org/2001/XMLSchema#integer', 'http://www.w3.org/2001/XMLSchema#long', 'http://www.w3.org/2001/XMLSchema#decimal', 'http://www.w3.org/2001/XMLSchema#double']),
atom_number(B, C),
!.
trig_term(literal(type('http://www.w3.org/2001/XMLSchema#boolean', A)), A) :-
!.
trig_term(literal(type(A, B)), literal(E, type(F))) :-
atom_codes(B, C),
escape_string(C, D),
atom_codes(E, D),
atomic_list_concat(['<', A, '>'], F),
!.
trig_term(literal(lang(A, B)), literal(E, lang(A))) :-
atom_codes(B, C),
escape_string(C, D),
atom_codes(E, D),
!.
trig_term(literal(A), literal(E, type('<http://www.w3.org/2001/XMLSchema#string>'))) :-
atom_codes(A, C),
escape_string(C, D),
atom_codes(E, D),
!.
trig_term(node(A), B) :-
!,
nb_getval(var_ns, Sns),
nb_getval(doc_nr, Dnr),
atomic_list_concat(['<', Sns, 'node_', A, '_', Dnr, '>'], B).
trig_term(A, B) :-
atomic_list_concat(['<', A, '>'], B).
% ----------------------------
% EAM (Euler Abstract Machine)
% ----------------------------
eam(Recursion) :-
( implies(Prem, Conc),
ignore(Prem = true),
catch(call_residue_vars(ucall(Prem), []), Exc,
( Exc = error(existence_error(procedure, _), _)
-> fail
; throw(Exc)
)
),
( ( Conc = false
; Conc = answer(false, void, void)
)
-> with_output_to(atom(Fuse), writeq('<http://www.w3.org/2000/10/swap/log#implies>'(Prem, false))),
throw(inference_fuse(Fuse))
; true
),
\+atom(Conc),
\+is_list(Conc),
djiti_conc(Conc, Concd),
( Concd = ':-'(Head, Body)
-> \+clause(Head, Body)
; ( Concd = '<http://www.w3.org/2000/10/swap/log#implies>'(_, _)
-> copy_term_nat(Concd, Concc),
labelvars(Concc, 0, _, avar),
\+cc(Concc),
assertz(cc(Concc))
; \+catch(ucall(Concd), _, fail)
)
),
( Concd \= ':-'(_, _)
-> nb_getval(wn, W),
labelvars(Prem-Concd, W, N), % failing when Prem contains attributed variables
nb_setval(wn, N)
; true
),
astep(Prem, Concd),
retract(brake),
fail
; brake,
( R is Recursion+1,
( \+recursion(R)
-> assertz(recursion(R))
; true
),
nb_getval(limit, Limit),
Recursion < Limit,
eam(R)
; open_null_stream(Ws),
tell(Ws),
nb_getval(wn, Wn),
w3,
forall(
retract(keep_ng(NG)),
( nl,
wt(NG),
nl
)
),
forall(
retract(keep_ng(NG)),
( nl,
wt(NG),
nl
)
),
retractall(pfx(_, _)),
retractall(wpfx(_)),
nb_setval(wn, Wn),
forall(
apfx(Pfx, Uri),
assertz(pfx(Pfx, Uri))
),
told,
( flag('output', Output)
-> tell(Output)
; true
),
w3,
forall(
retract(keep_ng(NG)),
( nl,
wt(NG),
nl
)
),
forall(
retract(keep_ng(NG)),
( nl,
wt(NG),
nl
)
)
; true
),
!
; assertz(brake),
exogen,
eam(Recursion)
).
astep(B, Cn) :-
( Cn = (Dn, En)
-> functor(Dn, P, N),
( \+pred(P),
P \= '<http://www.w3.org/2000/10/swap/log#implies>',
P \= '<http://www.w3.org/2000/10/swap/log#callWithCleanup>',
N = 2
-> assertz(pred(P))
; true
),
( Dn \= '<http://www.w3.org/2000/10/swap/log#implies>'(_, _),
catch(call(Dn), _, fail)
-> true
; djiti_assertz(Dn)
),
astep(B, En)
; ( Cn = true
-> true
; functor(Cn, P, N),
( \+pred(P),
P \= '<http://www.w3.org/2000/10/swap/log#implies>',
P \= '<http://www.w3.org/2000/10/swap/log#callWithCleanup>',
N = 2
-> assertz(pred(P))
; true
),
( Cn \= '<http://www.w3.org/2000/10/swap/log#implies>'(_, _),
catch(call(Cn), _, fail)
-> true
; djiti_assertz(Cn)
)
)
).
%
% DJITI (Deep Just In Time Indexing)
%
djiti_answer(answer((A, B)), (C, D)) :-
!,
djiti_answer(answer(A), C),
djiti_answer(answer(B), D).
djiti_answer(answer(A), answer(P, S, O)) :-
( nonvar(A)
; atom(P),
S \= void
),
A =.. [P, S, O],
!.
djiti_answer(answer(exopred(P, S, O)), answer(P, S, O)) :-
( var(S)
; S \= void
),
!.
djiti_answer(answer(A), answer(A, void, void)) :-
!.
djiti_answer(A, A).
djiti_conc(':-'(exopred(P, S, O), B), ':-'(A, B)) :-
!,
A =.. [P, S, O].
djiti_conc(answer((A, B), void, void), (answer(A, void, void), D)) :-
!,
djiti_conc(answer(B, void, void), D).
djiti_conc(A, A).
djiti_fact(answer(P, S, O), answer(P, S, O)) :-
atomic(P),
!,
( P \= '<http://www.w3.org/2000/10/swap/log#callWithCleanup>',
\+pred(P)
-> assertz(pred(P))
; true
).
djiti_fact(implies(A, B), implies(A, B)) :-
nonvar(B),
conj_list(B, D),
forall(
member(E, D),
( unify(E, F),
F =.. [P, _, _],
( \+fpred(P)
-> assertz(fpred(P))
; true
)
)
),
!.
djiti_fact('<http://www.w3.org/2000/10/swap/log#implies>'(A, B), C) :-
nonvar(B),
( conj_list(B, D)
-> true
; D = B
),
forall(
member(E, D),
( unify(E, F),
( F =.. [P, _, _],
\+fpred(P)
-> assertz(fpred(P))
; true
)
)
),
!,
makevars(implies(A, B), C, zeta).
djiti_fact(':-'(A, B), ':-'(C, D)) :-
!,
makevars((A, B), (C, D), eta).
djiti_fact('<http://www.w3.org/2000/10/swap/log#dcg>'(_, literal(A, type('<http://www.w3.org/2001/XMLSchema#string>'))), B) :-
!,
read_term_from_atom(A, C, []),
dcg_translate_rule(C, B).
djiti_fact(A, A) :-
ground(A),
A =.. [P, _, _],
( P \= '<http://www.w3.org/2000/10/swap/log#callWithCleanup>',
P \= '<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>',
P \= '<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>',
P \= pfx,
P \= flag,
\+pred(P)
-> assertz(pred(P))
; true
),
!.
djiti_fact(A, A).
djiti_assertz(A) :-
djiti_fact(A, B),
assertz(B).
%
% Reasoning output
%
w3 :-
nb_setval(wpfx, false),
forall(
( pfx(A, B),
\+wpfx(A)
),
( format('@prefix ~w ~w.~n', [A, B]),
assertz(wpfx(A)),
nb_setval(wpfx, true)
)
),
( nb_getval(wpfx, true)
-> nl
; true
),
nb_setval(fdepth, 0),
nb_setval(pdepth, 0),
nb_setval(cdepth, 0),
( answer(B1, B2, B3),
B1 \= '<http://www.w3.org/2000/10/swap/lingua#explanation>',
relabel([B1, B2, B3], [C1, C2, C3]),
djiti_answer(answer(C), answer(C1, C2, C3)),
indent,
labelvars(C, 0, _, avar),
wt(C),
ws(C),
( ( C = graph(_, _)
; C = exopred(graph, _, _)
)
-> true
; write('.')
),
nl,
fail
; true
),
( answer('<http://www.w3.org/2000/10/swap/lingua#explanation>', _, _)
-> nl,
writeln('# #'),
writeln('# lingua explanation #'),
writeln('# #'),
nl,
( answer('<http://www.w3.org/2000/10/swap/lingua#explanation>', S, O),
labelvars('<http://www.w3.org/2000/10/swap/lingua#explanation>'(S, O), 0, _, avar),
indent,
wt('<http://www.w3.org/2000/10/swap/lingua#explanation>'(S, O)),
ws('<http://www.w3.org/2000/10/swap/lingua#explanation>'(S, O)),
write('.'),
nl,
fail
; true
)
; true
).
wt(X) :-
functor(X, _, A),
( A = 0,
!,
wt0(X)
; A = 1,
!,
wt1(X)
; A = 2,
!,
wt2(X)
; wtn(X)
).
wt0(!) :-
!,
write('_:true '),
wp('<http://www.w3.org/2000/10/swap/log#callWithCut>'),
write(' true').
wt0(:-) :-
!,
wp('<http://www.w3.org/2000/10/swap/log#isImpliedBy>').
wt0([]) :-
!,
write('()').
wt0(X) :-
number(X),
!,
write(X).
wt0(X) :-
atom(X),
atom_concat(some, Y, X),
!,
( rule_uvar(L),
( ncllit
-> ( memberchk(X, L)
-> true
; retract(rule_uvar(L)),
assertz(rule_uvar([X|L]))
)
; memberchk(X, L)
)
-> write('var:U_')
; write('_:sk_')
),
write(Y).
wt0(X) :-
atom(X),
atom_concat(allv, Y, X),
!,
write('var:U_'),
write(Y).
wt0(X) :-
atom(X),
atom_concat(avar, Y, X),
!,
atomic_list_concat(['<http://www.w3.org/2000/10/swap/var#x_', Y, '>'], Z),
wt0(Z).
wt0(X) :-
\+keep_skolem(X),
nb_getval(var_ns, Sns),
atom(X),
sub_atom(X, 1, I, _, Sns),
J is I+1,
sub_atom(X, J, _, 1, Y),
( getlist(X, M)
-> wt(M)
; ( rule_uvar(L),
( ncllit
-> ( memberchk(Y, L)
-> true
; retract(rule_uvar(L)),
assertz(rule_uvar([Y|L]))
)
; memberchk(Y, L)
)
-> ( ( sub_atom(Y, 0, 2, _, 'e_')
; sub_atom(Y, 0, 3, _, 'bn_')
)
-> write('_:')
; sub_atom(Y, 0, 2, _, Z),
memberchk(Z, ['x_', 't_']),
write('var:')
)
; write('_:')
),
write(Y),
( sub_atom(Y, 0, 2, _, 'x_')
-> write('_'),
nb_getval(rn, N),
write(N)
; true