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Top-level Element: <extension>

Element <extension>
Definition Provides additional information not covered by MODS.
Attributes

Common:

Linking: ID; IDREF

Miscellaneous: displayLabel

Specific: type

Subelements None

GUIDELINES | EXAMPLES | MAPPINGS

Guidelines for Use

<extension> is a container element that may be used for elements that are not defined in the MODS schema, including those  local to the creator of the data. This element is repeatable.

Specific Attribute Information

type

Definition
A type of extension.
Application
A MODS record might include multiple extensions. This attribute should be used to provide information so that an application can find an extension that is of interest and bypass those that are not. There is no controlled list of extension types.

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EXAMPLES

Uses extension element to include cultural context  information, which is not in MODS:
example (based on VRA Core 4 file: http://vrawebor.ipower.com/projects/vracore4/examples/html/example003_full_xml.html)


<titleInfo>
<title>Stonehenge</title>
</titleInfo>
<extension>
<vra xmlns="http://www.vraweb.org/vracore4.htm" xsi:schemaLocation="http://www.vraweb.org/vracore4.htm //www.loc.gov/standards/vracore/vra.xsd">
<work>
<culturalContextSet>
<culturalContext>British</culturalContext>
<culturalContext>European</culturalContext>
</culturalContextSet>
<stylePeriodSet>
<display>Late Broze Age; Neolithic</display>
<stylePeriod>Late Broze Age</stylePeriod>
<stylePeriod>Neolithic</stylePeriod>
</stylePeriodSet>
<work>
</vra>
<extension>

A simpler example:

<titleInfo>
<title>Stonehenge</title>
</titleInfo>
<extension>
<vra xns="http://www.vraweb.org/vracore4.htm" xsi:schemaLocation="http://www.vraweb.org/vracore4.htm //www.loc.gov/standards/vracore/vra-strict.xsd" >
<image>
<techniqueSet>
<technique>digital imaging</technique>
</techniqueSet>
</image>
</vra>
</extension>

In the following example no external namespace is provided. It is assumed that edtms is known.

<extension type="degree">
<edtms >
<name>Ph.D.</name>
<level>2</level>
<discipline>Comparitive and International Education</technique>
<grantor>Coumbia University</grantor>
</edtms>
</extension>

<extension type="geo">
<rdf:RDF xmlns>:gml="http://www.opengis.net/gml/3.2/" xmlns:dc="http://purl.org/dc/elements/1.1/">
<rdf:Description rdf:about="http://purl.stanford.edu/wf287wt6130">
<dc:format>image/jpeg</dc:format>
<gml:boundedBy>
<gml:Envelope>
<gml:lowerCorner>140.153683 38.599973</gml:lowerCorner>
</extension>

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MAPPINGS

MARC Mapping (Bibliographic)

See MARC Mapping to MODS for the <extension> element.

Dublin Core Mapping

See MODS to Dublin Core Metadata Element Set Mapping.

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Last Updated: October 14, 2022