Extinct Components or Intentionally Omitted

This section acknowledges and gives reasoning for classes or properties that were intentionally left out.

This can be revisited or changed if necessary.

pcdmworks:TopRange

The PCDM Works Extension defines a class pcdmworks:TopRange that is meant to be the parent Range in a book. This was due to requirements for the IIIF Presentation API prior to version 3 where the top most range in a sequence needed a viewingHint="top" property. Since version three, this is no longer required and complex hierarchy can be modelled simply with the pcdmworks:Range class and properties and classes from iana and ore.

pcdm:Object

The pcdm:Object class is extended by other subclasses that add much more flexibility. For now, pcdm:Object has been dropped in lieu of its subclasses.