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Contexts allow such categories to be grouped and referred to by a context identifier (eg. landType, tourism); As a consequence, Weave clients may optionally specify categories (ie. "contexts") of entities that they will be working with. For example, the below client config specifies that the Holiday_client will utilise layers information from the tourism context group.<client:config id='Holiday_client' context='tourism'>
... Hence only entities that include the 'tourism' context will be used by the subject client, in additon to entities that do not have a context specification.
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