[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: XML complexity, namespaces (was WG)
Rick Jelliffe writes: > > From: David Megginson <david@m... > > >In SGML, you have to write a special program to act on the information > >in the data attributes (nothing does this out of the box); in XML, you > >have to write a special program to act on the PUA. > > Huh? OmniMark allows access to data attributes just as easily as element > attributes (http://www.omnimark.com/develop/om40/doc/concept/646.htm), Yes, so does SP. But (with the exception you note below) you still have to write an Omnimark or Perl or C++ program to act on the information in the data attributes. > out of the box. Several CALS-aware tools understand the notations used > in data attributes, e.g., when used for graphics. I agree that there are some tools already written that understand specific data attributes in specific cases, but the general case, you still have to write a specialised program (using Omnimark, Perl, or whatever) to do something useful with the data attributes, just as you have to write a specialised program (using Java, Perl, or whatever) to do something useful with PUA characters in XML. > And I dont agree that elements and characters and attributes and > entities should be thought of as interconvertable: search routines > look for character codes--I don't know of any search routines which > allow grepping on data and elements. Perhaps I misunderstood -- I thought that you were talking about the problem of including specialised, non-canonical characters in attribute values (say, to represent three variant 'd' graphemes in a 10th-century English manuscript or a customised Han character). I think that PUA characters provide a good solution for that problem -- the only difficulty is that all of the knowledge about those characters has to be encoded in the processing software using a lookup table, while the SGML data-attribute solution is slightly more modular since you can pass on extra generic information. All the best, David -- David Megginson david@m... http://www.megginson.com/ xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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