= @ObjectIdentifier
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Meta-annotation for a mandatory _String_ property or parameter representing a the identity of a domain object (with respect to its logical type, as per @ _DomainObject#logicalTypeName()_ or @ _Named#value()_ ) and consorts.

== API

[source,java]
.ObjectIdentifier.java
----
@interface ObjectIdentifier {
  int MAX_LENGTH;
  @AliasFor(annotation = Property.class, attribute = "maxLength")
int propertyMaxLength() default MAX_LENGTH;
  @AliasFor(annotation = Parameter.class, attribute = "maxLength")
int parameterMaxLength() default MAX_LENGTH;
  @AliasFor(annotation = Property.class, attribute = "optionality")
Optionality propertyOptionality() default Optionality.MANDATORY;
  @AliasFor(annotation = Parameter.class, attribute = "optionality")
Optionality parameterOptionality() default Optionality.MANDATORY;
  @AliasFor(annotation = javax.jdo.annotations.Column.class, attribute = "allowsNull")
String columnAllowsNull() default "false";
  @AliasFor(annotation = javax.jdo.annotations.Column.class, attribute = "length")
int columnLength() default MAX_LENGTH;
}
----

