Aspekte der morphologischen Analyse des Deutschen - Universität ...
Aspekte der morphologischen Analyse des Deutschen - Universität ...
Aspekte der morphologischen Analyse des Deutschen - Universität ...
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Anhang C: Programmcode<br />
/*********************************************************************************************************************************<br />
complete_chart(Word:)<br />
Check whether is's necessary to insert "unknown" segments<br />
at the end of the chart<br />
*********************************************************************************************************************************/<br />
complete_chart(Word) :-<br />
atom_length(Word,WordLen),<br />
add_unknown_segments(WordLen,Word).<br />
/*********************************************************************************************************************************<br />
closure(Begin:,End:,Cat:,Closed:,<br />
Open:,Positions:,Conditions)<br />
Depending on the active/inactive status the edge is either expanded or<br />
used to complete other edges<br />
*********************************************************************************************************************************/<br />
closure(Begin,End,Cat,RHS,[],Positions,Conditions) :- % inactive edge<br />
store(edge(Begin,End,Cat,RHS,[],Positions,Conditions)),<br />
% try to complete active edges with the inactive one<br />
complete(Begin,End,Cat).<br />
closure(Begin,End,Cat,Closed,[Next|Rest],Positions,Conditions) :- % active edge<br />
store(edge(Begin,End,Cat,Closed,[Next|Rest],Positions,Conditions)),<br />
expand(End,Next).<br />
/*********************************************************************************************************************************<br />
complete(Begin:,End:,CompleteCat:)<br />
tries to extend active edges waiting for CompleteCat<br />
*********************************************************************************************************************************/<br />
complete(Begin,End,Cat) :-<br />
edge(Begin0,Begin,LHS,Closed0,[Cat|Open],Positions,Conditions),<br />
append(Closed0,[Cat],Closed), % move the dot to the right<br />
append(Positions,[End],NewPositions),<br />
closure(Begin0,End,LHS,Closed,Open,NewPositions,Conditions),<br />
fail.<br />
complete(_Begin,_End,_Cat).<br />
/*********************************************************************************************************************************<br />
expand(Position:,LHS:)<br />
asserts an active edge for every rule starting with LHS<br />
*********************************************************************************************************************************/<br />
expand(Position,LHS) :-<br />
% find a suitable phrase/word structure rule<br />
applicable_rule(LHS,RHS,Conditions),<br />
closure(Position,Position,LHS,[],RHS,[],Conditions),<br />
fail.<br />
expand(_Position,_LHS).<br />
/*********************************************************************************************************************************<br />
applicable_rule(LHS:,RHS:,Conditions:):<br />
Looks for a applicable rule<br />
*********************************************************************************************************************************/<br />
applicable_rule(LHS,RHS,Conditions) :-<br />
(rule (LHS ==> RHS) conditions Conditions).<br />
/*********************************************************************************************************************************<br />
store(Edge:)<br />
Version without subsumptions check<br />
store(edge(Begin,End,Cat,Closed,Open,Positions)) :-<br />
\+ edge(Begin,End,Cat,Closed,Open,Positions),<br />
assert(edge(Begin,End,Cat,Closed,Open,Positions)).<br />
*********************************************************************************************************************************/<br />
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