[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: xbind:module == xsl:script + an essential layer of
| On Fri, 2 Mar 2001, Steve Muench wrote: | > I don't understand how the "URI-to-ResourceContainingXBindModule" | > binding takes place. How does the processor "hook up" with | > its XBindModule definition? From where does it fetch it the | > first time? Does it periodically ping for updates? | | I listed several levels of "hook-up" in the e-mail, you | neglected to discuss the first few: (1) build-in, | (2) local-catalogue, (3) stylesheet-provided, (4) | ask-the-user, and instead focused only on the RDDL | based binding mechanism, which I refer you to the | RDDL discussion for more detail. Ok. Understand now. But still seems like overkill to me for the common use case of a few little functions that your own stylesheet needed to get a job done. But I'm guessing we'll just have to agree to disagree on this point. | > This, I believe, is a red herring. URI's are URI's. | | Where in the xsl:script spec is a URI provided | to identify the functionality described? <xsl:script> is a general mechanism. It can bind any implementation resource to any namespace URI. To save you typing the namespace URI over and over, it lets you use the namespace *prefix* in the implements-prefix="pref" attribute, but this is defined to mean "implements the library of functions defined by the namespace URI bound to the prefix "pref" in scope. If it's a set of date functions, that URI might be: http://datestuff.com/xslt/extensions If it's a set of number functions, the URI might be: http://maths.org/xslt/library/wave-functions These are just namespace uri's defined anywhere in scope in the normal mechanism: <xsl:stylesheet xmlns:xsl="..." xmlns:date="http://datestuff.com/xslt/extensions" xmlns:maths="http://maths.org/xslt/library/wave-functions"> | There is a prefix, and this is not a global URI. It's just a prefix that refers to a namespace URI in scope. That URI is as globally unique as you engineer it to be. | Also there is a "src", and this is not a language | independent URI and must be missing when the | script code is included in the stylesheet. The src attribute is a *second* URI that points to the resource to be used as the implementation. So, via the prefix shortcut as defined above, the stylesheet fragment: <xsl:stylesheet xmlns:xsl="..." xmlns:date="http://datestuff.com/xslt/extensions/dates" xmlns:maths="http://maths.org/xslt/library/wave-functions" xmlns:lang="http://langdefs.org/xslt/extension/bindings"> <xsl:script implements-prefix="date" language="lang:yyyy" src="http://datestuff.com/xslt/extension/impl/dates.xyz"/> Simply makes the processor aware that there is an implementation of the functionality identified by the URI: http://datestuff.com/xslt/extensions/dates whose implementation can be found at the URI: http://datestuff.com/xslt/extension/impl/dates.xyz and which is to be understood to be implemented in language whose QName is "lang:yyyy" | What am I missing? Where is this | implementation-independent-uri in the 1.1 Draft? The draft doesn't impose any particular URI, but let's you or the community invent your own globally-unique, implementation independent URI's to be the identifier for a set of functions that accomplish a particular body of interesting functionality. ______________________________________________________________ Steve Muench, Lead XML Evangelist & Consulting Product Manager BC4J & XSQL Servlet Development Teams, Oracle Rep to XSL WG Author "Building Oracle XML Applications", O'Reilly http://www.oreilly.com/catalog/orxmlapp/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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