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category? Iprocedure
category-term Iprocedure
category-scheme Iprocedure
category-label Iprocedure
category-contents Cprocedure

Predicate and accessors for atom:category elements, which represent the categorization of the feed or entry.

(required by spec) category name, as a string
URI that identifies a categorization scheme, as a string
human-readable plain-text label for the category, as a string
Contents of the category element as an SXML document; undefined by the specification, but it might be useful.

term, scheme and label accessors return #f for missing information instead of the empty string as atom:author and atom:rights accessors do. This inconsistency is probably a bug.