Allow multiple defining specifications

[palemieux]

Some boxes might be defined in one specification, and extended by other specifications.

For example, the Colour Specification box specified in ISO/IEC 15444-1 is extended by ISO/IEC 15444-2 and ISO/IEC 15444-15.

Suggest allowing multiple defining specifications.

[mikedo]

The fact that multiple specifications are making separate versions of the same 4CC item is a document architecture problem I think. Using the RA to provide the linkage between the documents to address this seems awkward. Can the subject documents be amended/revised to consolidate the different versions?

[palemieux]

The fact that multiple specifications are making separate versions of the same 4CC item is a document architecture problem I think.

Yes.

Perhaps allowing multiple defining specifications goes too far, what about a single defining specification supplemented by any number of informative see also references?

Can the subject documents be amended/revised to consolidate the different versions?

Ideally, yes. The first step is to identify these overlaps. Some of these overlaps might be historical and difficult to fix.

[dwsinger]

We hold this and urge the JPEG group to discuss the issue. We'd rather not change the architecture of the RA to deal with something that we feel should not happen anyway.