The data is first stored in a Git (<bibl xmlns="http://www.tei-c.org/ns/1.0" corresp="https://edition-humboldt.de/SUJV58N2">Fechner/Klappenbach/Lampert 2025</bibl>) and in a second stage (automated) in an instance of the free XML database <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://www.exist-db.org">existdb</ref>, the module <hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#i">ediarum.DB</hi> is used to manage the data. Existdb serves at the same time - together with the web server Jetty - also as basis of the digital edition, which was realized with XQuery, XSLT and XPath and in the meantime in an eXistdb App in accordance with the EXPath packaging specifications, which simplifies Deployment and development. For the search functions, the Lucene-based faceting, available since eXistdb 5.0, is used. In addition, the edition has several specially programmed caches that increase performance, especially for complex queries. For the display of facsimiles, drawings and illustrations the software <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://digilib.sourceforge.net/">digilib</ref>, developed at the MPI for the History of Science, is used.