121 lines
2.8 KiB
Prolog
121 lines
2.8 KiB
Prolog
%
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% XMLBIF support for CLP(BN)
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%
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:- module(xbif,
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[clpbn2xbif/3]).
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:- use_module(library('clpbn/dists'),
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[get_dist_domain/2]).
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clpbn2xbif(Stream, Name, Network) :-
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format(Stream, '<?xml version="1.0" encoding="US-ASCII"?>
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<!--
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Bayesian network in XMLBIF v0.3 (BayesNet Interchange Format)
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Produced by CLP(BN)
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-->
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<!-- DTD for the XMLBIF 0.3 format -->
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<!DOCTYPE BIF [
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<!ELEMENT BIF ( NETWORK )*>
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<!ATTLIST BIF VERSION CDATA #REQUIRED>
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<!ELEMENT NETWORK ( NAME, ( PROPERTY | VARIABLE | DEFINITION )* )>
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<!ELEMENT NAME (#PCDATA)>
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<!ELEMENT VARIABLE ( NAME, ( OUTCOME | PROPERTY )* ) >
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<!ATTLIST VARIABLE TYPE (nature|decision|utility) "nature">
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<!ELEMENT OUTCOME (#PCDATA)>
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<!ELEMENT DEFINITION ( FOR | GIVEN | TABLE | PROPERTY )* >
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<!ELEMENT FOR (#PCDATA)>
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<!ELEMENT GIVEN (#PCDATA)>
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<!ELEMENT TABLE (#PCDATA)>
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<!ELEMENT PROPERTY (#PCDATA)>
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]>
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<BIF VERSION="0.3">
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<NETWORK>
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<NAME>~w</NAME>
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<!-- Variables -->',[Name]),
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output_vars(Stream, Network),
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output_dists(Stream, Network),
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format(Stream, '</NETWORK>
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</BIF>
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',[]).
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output_vars(_, []).
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output_vars(Stream, [V|Vs]) :-
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output_var(Stream, V),
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output_vars(Stream, Vs).
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output_var(Stream, V) :-
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clpbn:get_atts(V,[key(Key),dist(Id,_)]),
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get_dist_domain(Id, Domain),
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format(Stream, '<VARIABLE TYPE="nature">
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<NAME>',[]),
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output_key(Stream,Key),
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format('</NAME>~n',[]),
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output_domain(Stream, Domain),
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format(Stream, '</VARIABLE>~n~n',[]).
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output_domain(_, []).
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output_domain(Stream, [El|Domain]) :-
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format(Stream, ' <OUTCOME>~q</OUTCOME>~n',[El]),
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output_domain(Stream, Domain).
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output_dists(_, []).
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output_dists(Stream, [V|Network]) :-
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output_dist(Stream, V),
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output_dists(Stream, Network).
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output_dist(Stream, V) :-
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clpbn:get_atts(V,[key(Key),dist(_,CPT,Parents)]),
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format(Stream, '<DEFINITION>
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<FOR>',[]),
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output_key(Stream, Key),
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format('</FOR>~n',[]),
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output_parents(Stream,Parents),
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output_cpt(Stream,CPT),
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format(Stream, '</DEFINITION>~n~n',[]).
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output_parents(_,[]).
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output_parents(Stream,[P1|Ps]) :-
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clpbn:get_atts(P1,[key(Key)]),
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format(Stream, '<GIVEN>',[]),
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output_key(Stream,Key),
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format('</GIVEN>~n',[]),
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output_parents(Stream,Ps).
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output_cpt(Stream,CPT) :-
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format(Stream, ' <TABLE> ', []),
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output_els(Stream, CPT),
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format(Stream, '</TABLE>~n', []).
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output_els(_, []).
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output_els(Stream, [El|Els]) :-
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format(Stream,'~f ',[El]),
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output_els(Stream, Els).
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output_key(Stream, Key) :-
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output_key(Stream, 0, Key).
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output_key(Stream, _, Key) :-
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primitive(Key), !,
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write(Stream, Key).
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output_key(Stream, I0, Key) :-
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Key =.. [Name|Args],
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write(Stream, Name),
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I is I0+1,
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output_key_args(Stream, I, Args).
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output_key_args(_, _, []).
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output_key_args(Stream, I, [Arg|Args]) :-
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format(Stream, '~*c', [I,0'_]),
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output_key(Stream, I, Arg),
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output_key_args(Stream, I, Args).
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