14 Working with a Thesaurus in Oracle Text You can improve your query application with a thesaurus. This chapter contains the following topics: Overview of Oracle Text Thesaurus Features Defining Terms in a Thesaurus Using a Thesaurus in a Query Application Loading a Custom Thesaurus and Issuing Thesaurus-Based Queries Augmenting the Knowledge Base with a Custom Thesaurus Linking New Terms to Existing Terms Example of Loading a Thesaurus with ctxload Example of Loading a Thesaurus with the CTX_THES.IMPORT_THESAURUS PL/SQL procedure Compiling a Loaded Thesaurus About the Supplied Knowledge Base