5. The search system of claim 4 , wherein the dictionary builder includes: a sub-module that binds keywords in the identified categories of the hierarchical structures, using the results of the text analyzer.
4. The search system of claim 3 , wherein the semantic dictionary builder includes: a sub-module that identifies domain specific terms in a given keyword query, using domain specific glossary; a sub-module that finds synonyms and related terms for the identified keyword query terms, using a domain specific thesaurus; a sub-module that finds that statistically close terms to the identified keyword query terms; and a sub-module that identifies relevant domain specific categories for the identified keyword terms, using domain specific ontology.