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At 08:46 AM 3/31/01 -0800, Jeff Greif wrote: >The alternative I think you're describing is to use a hashtable of >attributes with defaults, and as the explicit attributes are collected, >mark each one off in the defaulted attributes table if it is found >there. Then the remaining defaults, produced by iterating over that >hashtable and ignoring marked entries, could be added to the explicit >attributes. > >Both ways work, with approximately equivalent performance, but the >second way makes it easier to preserve the order of the explicit >attributes (as found in the instance). The first way makes it easier to >preserve the order of non-explicit defaulted attributes (as found in the >DTD). Depending on how it was implemented, I don't think it would be difficult to preserve the order of the explicit attributes and append the defaulted attributes, thereby preserving both sequences. Gets a bit tricky when the order of instance usage is different from the order of declaration, of course. Simon St.Laurent - Associate Editor, O'Reilly and Associates XML Elements of Style / XML: A Primer, 2nd Ed. XHTML: Migrating Toward XML http://www.simonstl.com - XML essays and books
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