The DTS API contains classes such as SearchQuery, NamespaceQuery, SubsetQuery and others that search for DTS objects including Namespaces, Concepts, Subsets, etc. These objects are searched for by name, code or id in methods like findNamespaceByName() and findConceptsWithNameMatching(). Plug-ins can access these DTS query objects by making calls to {@link com.apelon.beans.dts.plugin.DTSQueries}. Sub-packages offer functionality for managing connections to the DTS server or database, handling Drag and Drop and generating subset exports.