How does the mapping to the VLO facets work?

The

Virtual Language Observatory

See: http://www.clarin.eu/vlo

uses concepts from the

Component Metadata Infrastructure

See: http://www.clarin.eu/cmdi

profiles (and in some cases XPaths as a fallback). A detailed overview is available at:

https://vlo.clarin.eu/mapping

More information about this topic can be found in this paper