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Top Level Element: <extension>

Definition Used to provide additional information not covered by MADS.
Attributes None
Subelements None

Guidelines for Use

<extension> may be used for elements that are local to the creator of the data, similar to MARC 9XX fields.

This element allows users to include local elements or elements from other namespaces.

This element is optional and repeatable.

Element Description


There are no attributes for <extension>.


There are no subelements for <extension>.

MARC Mapping

There is no MARC 21 Authority equivalent for <extension>, but would usually be local MARC (9XX) fields.



<name type="personal" authority="naf" >
<namePart>Brando, Marlon</namePart>


Last Updated: April 11, 2012