The normal search can be extended by a function that also finds historical spellings and other word forms. For this purpose, the edited texts are linguistically analyzed and annotated using the <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://kaskade.dwds.de/demo/cab/">DTA::CAB web service</ref>. Among other things, all words are lemmatized so that searches can be performed on the basis of this lemma. DTA::CAB was developed by Bryan Jurish as part of the <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://www.deutschestextarchiv.de">German Text Archive</ref>.