suggestion> usage note Catalog Record

[bertvannuffelen]

In section 6.5.5. the following usage note is provided.

foaf:primaryTopic property is functional: each catalog record can have at most one primary topic, i.e., describes one dataset or service.

Suggestion to use the union instead of an enumeration.

foaf:primaryTopic property is functional: each catalog record can have at most one primary topic, i.e., describes one cataloged resource.