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class="description"> Specifies a composite primary key class that is mapped to multiple fields

mappings of multiple properties or fields. Example:

with one-to-many multiplicity. If the collection is defined using generics to specify

> instance may be used serially to begin and commit multiple transactions.

> To override mappings at multiple levels of embedding, a dot (".") notation form must be used

of inheritance, where multiple PersistenceCapable classes share the same ObjectId class.

property level. This allows multiple fields and properties to share the same join definition and avoid

unambiguous identification of the field to be marked dirty. If multiple classes declare the same field

are usually defined at the type level and not the field or property level. This allows multiple

class="description"> Set multiple extensions, or use null to clear all extensions. Map keys