In the plant index<ref xmlns="http://www.tei-c.org/ns/1.0" target="https://edition-humboldt.de/H0016212/pflanzenregister">(see above</ref>), various web services and APIs are used to link scientific plant names from texts of <hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#i">edition humboldt</hi> to matching entries from taxonomic databases in an automated <hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#i">digital</hi> way. Using the <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://resolver.globalnames.org/">Global Names Resolver</ref> web service, the Plant Register links scientific names to entries in the <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://eol.org/">Encylopedia of Life</ref>, <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://www.tropicos.org/">Tropicos - Missouri Botanical Garden</ref>, <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://www.ipni.org/">The International Plant Names Index</ref> (IPNI). In addition, the <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://www.catalogueoflife.org/">Catalogue of Life</ref>, the <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://www.biodiversitylibrary.org/">Biodiversity Heritage Library</ref>, and the <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://www.gbif.org/">Global Biodiversity Information Facility</ref> are queried using their own interfaces and are also linked. Other databases may be added in the future, provided they have appropriate technical interfaces.