The stated design focus of each schema is corroborated by its documented deployment: TaxonX is used by Plazi to recover taxon treatments from legacy literature, TaxPub is an NLM DTD extension used for new taxonomic publications and their archiving in PubMed Central, and taXMLit was developed for detailed mark-up of historical texts allowing data extraction and analysis.
Evidence: Corroboration by documented deployments
XML schemas and mark-up practices of taxonomic literature