The first sentence of A.2.1 states:
"Each table in this Annex defines a container channel configuration that has a corresponding Universal Label (UL) for use as a value of the ChannelAssignment property."
However, UL first appears in 10.4.3, Sentence 1:
Sound essence shall be frame wrapped per SMPTE ST 382. Sound essence shall be contained in KLV packets labeled with the Wave Frame Wrapped Element UL.
As such, the expanded version of "UL", i.e., "Universal Label", should be introduced in 10.4.3, or, if it cannot be introduced as "Wave Frame Wrapped Element Universal Label (UL), then in 10.4.4:
"Channel assignment defines what reproduction channel is carried in each channel of the distributed track. Sound Track File channel assignment shall be indicated by a UL value in the Channel Assignment property of the Wave Audio Essence Descriptor."
I.e.:
"Channel assignment defines what reproduction channel is carried in each channel of the distributed track. Sound Track File channel assignment shall be indicated by a Universal Label (UL) value in the Channel Assignment property of the Wave Audio Essence Descriptor."
The first sentence of A.2.1 states: "Each table in this Annex defines a container channel configuration that has a corresponding Universal Label (UL) for use as a value of the ChannelAssignment property."
However, UL first appears in 10.4.3, Sentence 1: Sound essence shall be frame wrapped per SMPTE ST 382. Sound essence shall be contained in KLV packets labeled with the Wave Frame Wrapped Element UL.
As such, the expanded version of "UL", i.e., "Universal Label", should be introduced in 10.4.3, or, if it cannot be introduced as "Wave Frame Wrapped Element Universal Label (UL), then in 10.4.4: "Channel assignment defines what reproduction channel is carried in each channel of the distributed track. Sound Track File channel assignment shall be indicated by a UL value in the Channel Assignment property of the Wave Audio Essence Descriptor." I.e.: "Channel assignment defines what reproduction channel is carried in each channel of the distributed track. Sound Track File channel assignment shall be indicated by a Universal Label (UL) value in the Channel Assignment property of the Wave Audio Essence Descriptor."
And then remove "Universal Label" from A.2.1.