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Subject: re: "Compound" Application Structure
At 08:47 AM 7/10/03 -0500, Don Larson wrote: >[...] > > 4) Any comments or feedback to share. > > Regards, > >I agree with Dieter though that the concept of disjoint APS structures with >same ID being treated a one object is not a good idea and should be deprecated >in the WebCGM standard. It is indeed deprecated in WebCGM (and will probably be prohibited in 2.0) See last paragraph of: http://www.w3.org/TR/REC-WebCGM/REC-03-CGM-IC.html#webcgm_3_2_1_1 Background. This feature was added to CGM:1999 as a result of an attractive use case that was presented. In a sense, it is *logically* consistent, because the multiple occurrences of APS-with-same-id are really one *logical* APS. I.e., the 2nd, 3rd, ... occurrences are effectively a "ContinueAPSdefinition" element. But for the reasons explained in the above-referenced paragraph, it is problematic in practice and will be removed from the WebCGM profile at least. (If there were active work to republish CGM:1999, it would probably be deprecated and removed there in the base standard as well.) (ATA should deprecate this as well, in case it hasn't already done so.) Regards, -Lofton.
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