DDEX Data Dictionary , 2010-06-18

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DescriptorExtension

A Descriptor which extends another Descriptor.

Comments	DescriptorExtension: Scope DescriptorExtensions are Descriptors that extend a Descriptor. Example: Subtitle. A DescriptorExtension is not an AlternativeDescriptor because it cannot be used independently of the PrincipalDescriptor that it complements. Example: A Subtitle is not a complete Title on its own, and exists to extend or supplement a Title. Note that a DescriptorExtension is a DescriptorPart of an ExtendedDescriptor that is formed by concatenating the Descriptor and its DescriptorExtension.
Relationships
Parents	Descriptor	A Name or Annotation of an Entity expressed as a partially-defined or undefined data value.
Children	NameExtension	A Descriptor (such as a SubTitle) which is supplementary to, but not contained within, a Name.

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