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Description
For INSPIRE it is necessary to specify the vocabulary attribute for keywords, but this is currently not possible with GeoServer. Btw, this is not INSPIRE specific, but comes from the vanilla WMS spec.
An example of what needs to be possible is:
<KeywordList><Keyword vocabulary="ISO">infoMapAccessService</Keyword><Keyword vocabulary="GEMET - INSPIRE themes, version 1.0">Hydrography</Keyword></KeywordList>
I guess this should come with the ability to define well know vocabularies in the admin interface, and at the time of adding a keyworkd being also able of chosing the keyword from some sort of vocabulary drop down?