A category describing the job, preferably using a term from a taxonomy such as [BLS O\*NET-SOC](http://www.onetcenter.org/taxonomy.html), [ISCO-08](https://www.ilo.org/public/english/bureau/stat/isco/isco08/) or similar, with the property repeated for each applicable value. Ideally the taxonomy should be identified, and both the textual label and formal code for the category should be provided. Note: for historical reasons, any textual label and formal code provided as a literal may be assumed to be from O\*NET-SOC.

Educational background needed for the position or Occupation.

The duration of the item (movie, audio recording, event, etc.) in [ISO 8601 duration format](http://en.wikipedia.org/wiki/ISO_8601).

The ISO 3166-1 (ISO 3166-1 alpha-2) or ISO 3166-2 code, the place, or the GeoShape for the geo-political region(s) for which the offer or delivery charge specification is not valid, e.g. a region where the transaction is not allowed. See also [eligibleRegion](https://schema.org/eligibleRegion).

The service provider, service operator, or service performer; the goods producer. Another party (a seller) may offer those services or goods on behalf of the provider. A provider may also serve as the seller.

The source or cause of the event.

The category or type of credential being described, for example "degree”, “certificate”, “badge”, or more specific term.