On Thu, 24 Oct 96 14:09:05 CDT, Michael Sperberg-McQueen <U35395@UICVM.UIC.EDU> wrote: >On 30 October 1996, the ERB will vote to decide the following >question. A straw poll indicates the question needs further >discussion in the work group. > >D.2 Should XML provide shorthand ways of summarizing the salient >points a document's DTD? > > * empty elements > * mixed-content or element-content elements > * required attributes > * default attribute values > * identity of ID and IDREF(S) attributes > * identity of CONREF attributes (if allowed) > * other? No. Use the simplified markup declaration syntax. >If so, > * D.2 a. Should such short-hand summaries be required? No. The DTD can be used if they aren't present. > * D.2 b. Allowed in place of DTDs? Yes. If you must have them, they cannot coexist with DTDs for the reason given below. > * D.2 c. Allowed in addition to DTDs? No, because the two could conflict. > * D.2 d. If so, is inconsistency between the DTD and the summary > an error? Yes. > * D.2.e. A reportable error? Yes, which would require you to parse both of them, so why have the shorthand. Conclusion: Stick with DTDs, but allow the external subset or all of the DTD to be ignored if not needed to parse the document instance. -- Charles F. Goldfarb * Information Management Consulting * +1(408)867-5553 13075 Paramount Drive * Saratoga CA 95070 * USA International Standards Editor * ISO 8879 SGML * ISO/IEC 10744 HyTime Prentice-Hall Series Editor * CFG Series on Open Information Management --Received on Friday, 25 October 1996 17:36:40 EDT
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