[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: Formatting Processing Instructions
Disclaimer first: not a wizard, don't play one on television. My colleagues think I know something about XML, but my SGML knowledge is mostly limited to Goldfarb's book (and adapting SGML to XML workflows, but that's always custom work). Have some questions, though. On Wed, 22 Feb 2012 18:19:00 -0600, Len Bullard wrote: > So some require PIs to support > > o system ids What? Outside a doctype? I doubt anyone could find an alternate solution without an example of how this is working; SystemID-s seem (to me) to be tightly coupled to doctype declarations. > o change tracking I can see this one. In fact, replacing this would be hard; change tracking could break the tree with (HTML-style) spans that break tag-start/tag-end parity. You could do it with plain old markup, anyway <del timestamp="" author="">...</del> and corresponding <add /> and <repl />. Doesn't map 1:1 where tag enclosure breaks, but otherwise easy. Breaks DTDs (but could be made to work by DTD inclusion: define these bits in something that %pe-includes the real DTDs). > o short duration meta-descriptors Don't know what this means. > o medium legacy code Don't think I know what this means. It could mean: there are processors that understand specific processing instructions. Sort of the original use case for PIs, you know? So, if there are alternate solutions of various sorts, replace the legacy processors with the more widespread ones, and replace their (pi-based) markup with (whatever). > o page fidelity A great deal depends upon what this means. If it means "page marker persistence" (so that someone can do the usual bibliographic cites, author, title (publisher: date), p. x), the ebook people seem to be solving this, though it's inevitably going to be an issue while display resolution varies. If it means "inline presentational markup" (that doesn't compete with the semantic structure), then PIs are a solution, as is the hideous abortion that is the "style" attribute in HTML. In general, the solution to inline presentational markup is "don't do that!" If it means that presentational markup external to the semantic markup can be associated, you already know how to do that, I think (xsl:fo comes immediately to mind), so it must mean something different, right? Amy! -- Amelia A. Lewis amyzing {at} talsever.com Love? A joke, that. Love was the problem, not the solution. Being hit by a car was better than love. -- Steven Brust, PJF, "Cowboy Feng's Space Bar and Grille"
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