I have got a question on understanding of the "Real World Value
Mapping Module" that is contained in the "Real World Value Mapping
Information Object Definition (composite)".


1. The standard specifies for "Referenced Image Real World Value
Mapping Sequence" (0040,9094): A sequence of one or more real world
value mapping items. Each item defines a single mapping and a list of
images to which the mapping applies.

Does "single mapping" mean that the "Real World Value Mapping
Sequence (0040,9096)" contains just a single item?
Fe.: If I have two mappings that apply to the same set of
referenced images (Referenced Image Sequence (0008,1140)) is it
allowed to have

Referenced Image Real World Value Mapping Sequence (0040,9094)
First Item:
> Real World Value Mapping Sequence (0040,9096)

First Item:
> (... Some DataElements ...)
> LUT Label (0040,9210): SomeLabel_A

Second Item:
> (... Some DataElements ...)
> LUT Label (0040,9210): SomeLabel_B
> Referenced Image Sequence (0008,1140)
> (... Image SOP Instance Reference Macro ...) ImageSet_A


or do I need to replicate the sequence item, ie.

Referenced Image Real World Value Mapping Sequence (0040,9094)
First Item:
> Real World Value Mapping Sequence (0040,9096)

First Item:
> (... Some DataElements ...)
> LUT Label (0040,9210): SomeLabel_A
> Referenced Image Sequence (0008,1140)
> (... Image SOP Instance Reference Macro ...) ImageSet_A

Second Item:
> Real World Value Mapping Sequence (0040,9096)

First Item:
> (... Some DataElements ...)
> LUT Label (0040,9210): SomeLabel_B
> Referenced Image Sequence (0008,1140)
> (... Image SOP Instance Reference Macro ...) ImageSet_A



2. According to the description "LUT Label (0040,9210)": Label that is
used to identify this transformation.
Is it allowed to have the same "LUT Label" in different items of
the "Referenced Image Real World Value Mapping Sequence (0040,9094)",
ie. use the same LUT Label "SomeLabel_A" for different sets of
referenced images (Referenced Image Sequence (0008,1140))?


Referenced Image Real World Value Mapping Sequence (0040,9094)
First Item:
> Real World Value Mapping Sequence (0040,9096)

First Item:
> (... Some DataElements ...)
> LUT Label (0040,9210): SomeLabel_A
> Referenced Image Sequence (0008,1140)
> (... Image SOP Instance Reference Macro ...) ImageSet_A

Second Item:
> Real World Value Mapping Sequence (0040,9096)

First Item:
> (... Some DataElements ...)
> LUT Label (0040,9210): SomeLabel_A
> Referenced Image Sequence (0008,1140)
> (... Image SOP Instance Reference Macro ...) ImageSet_B