The descriptor formatIdentifierSource is used in combination with the unambiguous reference or identifier for a rendition/instantiation of a media item as found in the descriptor formatIdentifier. Thus PBCore provides not only a locator number, but also indicates an agency or institution who assigned it.
Another element named identfierSource is used in combination with the element identifier to reference or identify the entire record of metadata descriptions for a media item and from which source the identifier is derived. Both exist at the top level for a PBCore description and its associated description document (XML).
Use an authority file to determine how to properly enter names and organizations. Use a URL where possible or practical. If the authority is identified by a personal name or corporporate/organizational name, PBCore recommends the following rules:
FOR PERSONAL NAMES:
Enter personal names in inverted form using commas as indicated here:
- LastName, FirstName MiddleName, Suffix.
- Substitute a MiddleInitial for a MiddleName as appropriate, or ignore if not available.
- The suffix is any type of academic credential (Ph.D., Ed.D.) or familial lineage (Smithee, Alan, III)
FOR CORPORATE OR ORGANIZATIONAL NAMES:
Enter corporate names in full direct form.
- Use the most specific and commonly used official name for an organization if it is distinctive enough to identify the group.
- If a particular subdivision of an organization is intended, identify both the more encompassing group as well as the subdivisions.
- The hierarchy (main group and subdivision) starts with the main group, followed by <period space>, then the subdivision.
- For example:
- State of Utah. Film Commission
- Smithee Productions. Educational Division
- Wisconsin Public Television. Extension Division
For a very enlightening discussion on the complexities of entering and displaying names, see "Representing People's Names in Dublin Core."