The sentence states:
A KDM is an ETM instance which has in the RequiredExtensions element a child element named KDMRequiredExtensions (defined below), and which also makes use of the AuthenticatedPrivate element of the ETM to store content keys.
Recommend deleting "(defined below)" as it is not needed if it is defined in Clause 5.2. If defined elsewhere, then the clause(s) should be specified.
The sentence states: A KDM is an ETM instance which has in the RequiredExtensions element a child element named KDMRequiredExtensions (defined below), and which also makes use of the AuthenticatedPrivate element of the ETM to store content keys.
Recommend deleting "(defined below)" as it is not needed if it is defined in Clause 5.2. If defined elsewhere, then the clause(s) should be specified.