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Subject: Re: [ubl-ndrsc] XPath futures
> I came away with the impression that we should feel confirmed in our > wariness of schema-aware software ^^^^^^^^^^^^ Did you mean "schema-aware software" or "type-aware software"? Eve L. Maler wrote: > While at the CSW XML Summer School last week (giving a UBL tutorial and > therefore missing the UBL F2F), I attended an XSLT Expert Forum, where > Jeni Tennison, Sebastian Rahtz, Bob DuCharme, and others reviewed the > state of the art in XSLT/XPath V1.0 and where it's going in V2.0. I > thought it might be useful to share some of the information I learned > there, since it relates to our previous global/local discussions in UBL. > (Apologies if you all know this already.) I do *not* mean to bring up > old discussions for re-decision, merely provide context. > > One of the rationales that I gave for supporting global elements was > that if you wanted to reuse local-only UBL for making your own document > types, the "head" of a tree of reuse would require a mapping from the > UBL type to a foreign element, even if the type needed no changes. > (Below the "head", the elements would be in the UBL namespace, not the > foreign one.) This means that non-type-aware technologies such as XPath > V1.0 would require changes to existing stylesheets/programs to change > the "head" element's name if nothing else. > > We in UBL have been assuming that, since XPath and XSLT V2.0 will be > type-aware, this problem will be solved at some point in the near > future, potentially blunting this rationale. However, I learned that > XPath and XSLT V2.0 have conformance levels, and the higher level -- the > schema-aware one -- doesn't look like it will be very common at all. W3C > standardization is, optimistically, 9-12+ months away, depending on the > appearance of implementations. And there continues to be a lot of > controversy in the XML development community around the usage of the > Post-Schema Validation Infoset (PSVI)... > > I came away with the impression that we should feel confirmed in our > wariness of schema-aware software when trying to attend to our "various > and sundry" principle. > > For what it's worth, > > Eve > -- Eduardo Gutentag | e-mail: eduardo.gutentag@Sun.COM Web Technologies and Standards | Phone: +1 510 550 4616 x31442 Sun Microsystems Inc. | W3C AC Rep / OASIS TAB Chair
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