TOQE: the Thesaurus Query Expander

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TOQE, the Thesaurus Query Expander, is a standardized interface definition for accessing thesaurus systems that may be integrated into search engines or all kinds of query-processing pipelines.

Implemented as an XML-based web service, it provides the client with a fixed set of methods, thereby hiding the complexity and structure of the underlying thesaurus and expands the query in a thesaurical meaning based on the desired mode of operation.

The process of querying a thesaurus becomes transparent, generic and independent of the thesaurus used.



Documentation Demo
  • Search for Calendula arvensis in Euro+Med Plantbase
  • Search for related names and synonyms of Calendula arvensis, nameID = 7000009, in Euro+Med Plantbase, Compositae Greuter
  • Search for related names, synonyms and hierarchy in the taxonomic tree (recursive search) for Calendula arvensis, nameID = 7000009, in Euro+Med Plantbase, Compositae Greuter


  • Make your own search
    • Search based on a name:


    • Search based on NameID and referenceID (both mandatory fields):