Here is what the spec says:
Quote:
D.3.3 belongs-to-collection
Name: belongs-to-collection
Description:
The belongs-to-collection property identifies the name of a collection to which the EPUB publication belongs. An EPUB publication MAY belong to one or more collections.
It is also possible to chain these properties using the refines attribute to indicate that one collection is itself a member of another collection.
To allow reading systems to organize collections and avoid naming collisions (e.g., unrelated collections might share a similar name, or different editions of a collection could be released), EPUB creators SHOULD provide an identifier that uniquely identifies the instance of the collection. The dcterms:identifier property must carry this identifier.
The collection MAY more precisely define its nature by attaching a collection-type property.
The position of the EPUB publication within the collection MAY be provided by attaching a group-position property.
Allowed value(s): xsd:string
Cardinality: zero or more
Extends: Applies to the EPUB publication and can refine other instances of itself.
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So yes, and you may want to add what type of collection it is as the spec says. I have attached a snapshop of making up this info for a public domain epub just to show you. See the attached image.