This schema file defines common types used by multiple entities and possibly spanning several types of requests.
A collection of metadata items. There may be an absolute limit that imposes additional constraints on the number of metadata items.
A MetadataItem is simply a name-value pair. The name is specified in the key attribute and the value is included inline.
A meta data name-value pair.
An integer between 0 and 100 that denotes the progress of an operation.
A universally unique identifier.
An extended status must contian a prefix.