In the German Text Archive, over <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://www.deutschestextarchiv.de/api/pnd/118554700">180</ref> of <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://www.deutschestextarchiv.de/api/pnd/118554700">Alexander von Humboldt's writings</ref> are available TEI-XML encoded in full text. A function has been implemented in the chronology that displays or searches the title data of these writings. For this purpose, the <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://kaskade.dwds.de/dstar/dta/">D* OpenSearch API</ref> (dazu<ref xmlns="http://www.tei-c.org/ns/1.0" target="https://kaskade.dwds.de/dstar/dta/osd.xml">:OpenSearch Description</ref>) provided by the German Text Archive is used. Thus, the full texts of Humboldt's writings can not only be displayed, but also searched: The search function allows to specify the number of hits and to link directly to the hit list.