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content model object in Fedora: cmodel:pagedmulticopy

This content model will be used for collections where we expect to have multiple copies of objects for a single metadata record. It is somewhat similar to the FRBR-like model that the University of Virginia uses, but at a lower level. Where Virginia's model expresses work-to-item relationships, this model expresses manifestation-to-item relationships. That is, the objects being grouped together are very similar, and will all share the same descriptive metadata.

The multi-copy content model introduces a new level of object ("manifestation") into an existing content model. Each of these manifestation objects will have a metadata datastream that stores two things: descriptive metadata, and pointers to the objects that represent copies of this item.

Each of the item-level objects will follow a the same content model (but the specific model used is collection-dependent). The only difference between item-level objects that are part of a normal content model and objects that are part of the multi-copy model is that in the multi-copy model, descriptive metadata at the item level will be limited to the amount that would normally be placed in the Fedora default DC datasteam.

Manifestation object

Paged Image disseminator

Default disseminator

Metadata disseminator

Even though a document with multiple copies is not the same as a paged document, it uses the same disseminator to access children of the manifestation object.

An example

An example from the IN Harmony sheet music project.

Sample metadata:

As usual, the page-level object holds image datastreams, and the item-level object holds a printable PDF.

A few questions about the manifestation level METS. In this structure:

<mets:structMap ID="structMap">
<mets:div DMDID="dmdSec-mods">
  <mets:mptr LOCTYPE="PURL" xlink:href=""/>
  <mets:mptr LOCTYPE="PURL" xlink:href=""/>
  <mets:mptr LOCTYPE="PURL" xlink:href=""/>
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