The fileIdentifier property is obtained from the media file. The property is assigned by the creator of the media file.<1>
For example, if the same file is shared by two different DMS implementations, although the value of the "id" attribute on the "item" property can be different on each DMS, the value of the fileIdentifier property is the same, since the value is obtained from the file itself.
At most, one instance of each property is allowed.
The syntax of the property is defined as follows:
PropertyName = "microsoft:fileIdentifier"; UTF-8
PropertyValue = ALPHA; UTF-8
MMPE = "<" PropertyName ">" PropertyValue "</" PropertyName ">";