Clarify meaning of DataService.language

[jakubklimek]

Problem statement
In the current GeoDCAT-AP 2.0.0, the language of a DataService has a usage note:

This property refers to a language supported by the Data Service. This property can be repeated if multiple languages are supported in the Data Service

The problem is that it is unclear what is meant by the reference to the Data Service class. The language of the data served by the Data Service is already covered by Dataset.language. Therefore, the Data Service language refers to the language of the parameters of the service and of the data structures (XML tags, CSV column headers, JSON key names, etc.) returned by that service.

Proposal
Clarify that DataService.language refers to the language of the parameters of the service and of the data structures (XML tags, CSV column headers, JSON key names, etc.) returned by that service by changing the usage note to:

The language of the structure that can be returned by querying the endpointURL.

consistently with how the DataService.format usage note looks like in DCAT-AP 3.0.

[jakubklimek]

Resolution approved during the webinar.