 more VCL NAL units of the priority layer, access unit delimiter, end of sequence, and end of stream NAL units that are present in access units that contain VCL NAL units of the priority layer. The set of NAL units that represents the set union of all priority layers that are associated with the same value of dependency_id is referred to as dependency layer. A dependency layer is associated with a particular value of dependency_id A priority layer A is directly dependent on a priority layer B when any VCL NAL unit of the priority layer A references data of any VCL NAL unit of the priority layer B through inter prediction or inter-layer prediction as specified in the decoding process in clause G.8. A priority layer A is indirectly dependent on a priority layer B when the priority layer A is not directly dependent on the priority layer B but there exists a set of n (with n being greater than 0) priority layers {C0, Cn-1} with the following properties: The priority layer A is directly dependent on the priority layer C0, each priority layer C with i in the range of 0 to n - 2, inclusive, is directly dependent on the priority layer Ci+1, and the priority layer Cn-1 is directly dependent on the priority layer B. The representation of a particular priority layer is the set of NAL units that represents the set union of the particular priority layer and all priority layers on which the particular priority layer directly or indirectly depends. The representation of a priority layer is also referred to as priority layer representation. In the following specification of this clause, the terms representation of a priority layer and priority layer representation are also used for referring to the access unit set that can be constructed from the NAL units of the priority layer representation. A priority layer representation can be decoded independently of all NAL units that do not belong to the priority layer representation. pr_num_dIds_minusl plus 1 specifies the number of dependency layers for which the priority layer charact