Subject: Re: Cascading. ( Re: Recursive Template Application ) From: Paul Tchistopolskii <paul@xxxxxxx> Date: Tue, 20 Jun 2000 03:42:01 -0700 |
----- Original Message ----- From: Matt Sergeant > > > > > Actually there is a standard way, but its outside the realm of XSLT and > > > > > inside the realm of XML. Its called "cascading" and is detailed in the > > > > > HTML 4.0 spec, and referenced explicitly in > > > > > http://www.w3.org/TR/xml-stylesheet > > > > I'm sorry, I failed to find the word 'cascading' in the URL you are providing. > > (funny that, eh?) > > Not very funny at all - you just didn't look hard enough ;-) > > The concept of cascading is detailed in _the_HTML_4.0_spec_. The HTML 4.0 > spec is "referenced explicitly in > http://www.w3.org/TR/xml-stylesheet". Does that make sense now? Yes, it makes. 'Cascading' is something that was considered to be good for HTML / CSS and now there is some attempt to make this model "... a standard way, but its outside the realm of XSLT and inside the realm of XML. " I still think it is funny. The same pattern has been applied to XSL FOs. I'm very happy that XSLT and XPath have survived. No kidding. > > It is good you have a standard technique to support some typical > > usecases, like: > > > > "cat some.xml | aggregate.xsl | expand_widgets.xsl | render2pdf.xsl | render.class " > > > > and > > > > "cat some.xml | aggregate.xsl | expand_widgets.xsl | render2html.xsl " > > > > Mind to share how to do that with AxKit powered by appropriate w3c > > standard technique for cascading ? > > Sure: > > "cat some.xml" > > The "cat" here picks up the stylesheets that are to be used from the > <?xml-stylesheet?> processing instructions, as per the w3c spec. Hmm... In my example, 'cat' is: cat.xsl <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:param name="ux-argv1" /> <xsl:template match="/"> <xsl:copy-of select="document( $ux-argv1 )" /> </xsl:template> </xsl:stylesheet> 'cat.xsl' could be appied to any file and has no knowledge about the future of the dataflow. Do I understand right that in your universe 'cat' is transaction-specific thing? In this case the semantics of your 'cat' will be similiar to semantics of Ux pipe. ... but I think my guesses are wrong again. Could you pelase explain *what* is your 'cat' which conforms to some w3c standard (right?) I wish you also have another 'standard' answer regarding: cat some.xml | aggregate.xsl mode="terse" | expand_widgets.xsl | render2html.xsl font="big" ( I think that tuning transformations with some parameters is unavoidable thing in the real life. Can you imagine scripts without parameters? Scripts are transformations ). > > I'm sorry if it was not appropriate to place this view on chaining > > in reply to your letter ( because I now realize that your leter was > > actualy talking about the standards which are good for us, right ? ) > > Right. I'm not trying to flog AxKit to everyone here - most people will > prefer a Java solution anyway (poor lost souls ;-)), just trying to point > out that there is a standard for cascading that applies to XSLT. I don't think it makes too much sense with XSLT. BTW - I don't see any problem if you explain to poor lost souls what variations AxKit does ( or is planning to do ) around XSLT. I wish it is not the off-topic here. > > > > Poor me, who is now using document( "!/ ls | sort | verbose") in almost > > every XSLT stylesheet .... It is not standard.... > > Indeed - I'm amazed it even works ;-) So was I, when I realized that almost everything could be done with any java component if the component extends SAXparser. Ux embedds XT, because XT is SAXParser. Ux itself is a SAXParser so 'the entire thing ' could be easily embedded into other programm. I realy like this game and hardly remember similiar things happening before XML. BTW - is Salbotron SAXParser? Is it providing parse() and setDocumentHandler() to the perl code? If yes - you can have the same document( "/! perl-bean1 | perl-bean2" ) in perl. Ux pattern is universal and should be easy to re-implement in any language, because it is plain SAX and nothing more. Rgds.Paul. XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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