The metadata and texts of the edited manuscripts (travel journals, letters and documents) are encoded according to the guidelines of the <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://www.tei-c.org/ns/1.0">Text Encoding Initiative (TEI)</ref>. By using ediarum.BASE.edit, the <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://deutschestextarchiv.de/doku/basisformat/">Base format of the German Text Archive (DTABf)</ref> (<bibl xmlns="http://www.tei-c.org/ns/1.0" corresp="https://edition-humboldt.de/47JJACHG">Haaf/Geyken/Wiegand 2015</bibl>) is largely used, which has been extended for the encoding of handwritten texts, <bibl xmlns="http://www.tei-c.org/ns/1.0" corresp="https://edition-humboldt.de/EACNDF7P">(Haaf/Thomas 2018)</bibl>. For a few project-specific concerns, additions and extensions to the tagset were made that are compliant with the TEI guidelines. These extensions relate in particular to project-specific requirements arising from the material, such as the tagging of measurements as well as inserted or appended notes. However, the extensions has been made in a way, that these follow as closely as possible the systematics of the DTABf. Thus, in many cases, instead of adding new elements or attributes, attribute values were added.