C.23.4.1.1.1 Selector Sequence Pointer

The Sequence Attribute in the referenced Image identified by the value of Selector Sequence Pointer (0072,0052) may have more than one Item, in which case the filter or image set selector is applied to the values of the attribute identified by Selector Attribute (0072,0026) in all Items of the Sequence. The Selector shall match the specified value(s) of the specified Attribute in any Item of the Sequence Attribute in the referenced Image.

If the Functional Group Pointer (0020,9167) attribute is not present, then the Sequence Attribute identified by Selector Sequence Pointer (0072,0052) resides in the top level Data Set of the referenced Image.