In <hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#i">edition humboldt digital</hi>, this data is queried via the API of correspSearch in two places: firstly, in the <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://edition-humboldt.de/chronologie/index.xql?jahr=&cs=on&offset=51">chronology</ref> (if this option is activated accordingly); this brings together the more than 1600 entries on Humboldt's life with his published correspondence. On the other hand, the correspSearch API is queried in the individual view of a letter under "Explore letter network". There, letters from and to Alexander Humboldt from other editions are queried in order to make visible with which other correspondence partners Humboldt still had contact in the respective period. In addition, the letters received and sent by the respective correspondence partner during the corresponding period are displayed - the query is based on the GND or VIAF URI stored in the register. In this way, the "extended correspondence context" of the letter network is made visible<bibl xmlns="http://www.tei-c.org/ns/1.0" corresp="https://edition-humboldt.de/HW747AF8">(Dumont 2023</bibl>). This function was originally prototyped in the <hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#i">edition humboldt digital</hi> on the basis of XQuery and then newly implemented in the DFG project correspSearch as a <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://correspsearch.net/de/csLink.html">freely reusable Javascript widget <hi rendition="#i">csLink</hi></ref> (Müller-Laackman / Dumont 2022). This is also used in the meantime in <hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#i">ehd</hi>.