SimplePart
id
A string that is the content ID for the MIME part.
mimetype
A string that is the content-type for the MIME part.
mimeparameters
A string that provides the values of any significant MIME parameter(s) needed to understand the processing demands of the content-type.
NamespaceSupported
An IS document that identifies the schema for the MIME part.
location
A URI for retrieval of the schema associated with the namespace.
version
A version value for the namespace.