// just static main
public static void Main(string[] args)
{
string treeString = "(ROOT (S (NP (PRP$ My) (NN dog)) (ADVP (RB also)) (VP (VBZ likes) (S (VP (VBG eating) (NP (NN sausage))))) (. .)))";
// Typically the tree is constructed by parsing or reading a
// treebank. This is just for example purposes
Tree tree = Tree.ValueOf(treeString);
// This creates English uncollapsed dependencies as a
// SemanticGraph. If you are creating many SemanticGraphs, you
// should use a GrammaticalStructureFactory and use it to generate
// the intermediate GrammaticalStructure instead
SemanticGraph graph = SemanticGraphFactory.GenerateUncollapsedDependencies(tree);
// Alternatively, this could have been the Chinese params or any
// other language supported. As of 2014, only English and Chinese
ITreebankLangParserParams @params = new EnglishTreebankParserParams();
IGrammaticalStructureFactory gsf = @params.TreebankLanguagePack().GrammaticalStructureFactory(@params.TreebankLanguagePack().PunctuationWordRejectFilter(), @params.TypedDependencyHeadFinder());
GrammaticalStructure gs = gsf.NewGrammaticalStructure(tree);
log.Info(graph);
SemgrexPattern semgrex = SemgrexPattern.Compile("{}=A <<nsubj {}=B");
SemgrexMatcher matcher = semgrex.Matcher(graph);
// This will produce two results on the given tree: "likes" is an
// ancestor of both "dog" and "my" via the nsubj relation
while (matcher.Find())
{
log.Info(matcher.GetNode("A") + " <<nsubj " + matcher.GetNode("B"));
}
}
/// <summary>
/// This is hardwired to calculate the split categories from English
/// Penn Treebank sections 2-21 with a default cutoff of 300 (as used
/// in ACL03PCFG).
/// </summary>
/// <remarks>
/// This is hardwired to calculate the split categories from English
/// Penn Treebank sections 2-21 with a default cutoff of 300 (as used
/// in ACL03PCFG). It was added to upgrading of code in cases where no
/// Treebank was available, and the pre-stored list was being used).
/// </remarks>
public static ICollection <string> GetEnglishSplitCategories(string treebankRoot)
{
ITreebankLangParserParams tlpParams = new EnglishTreebankParserParams();
Treebank trees = tlpParams.MemoryTreebank();
trees.LoadPath(treebankRoot, new NumberRangeFileFilter(200, 2199, true));
return(GetSplitCategories(trees, 300.0, tlpParams.TreebankLanguagePack()));
}
