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RE: About the style processing instruction
Subject: RE: About the style processing instruction From: "Didier PH Martin" <martind@xxxxxxxxxxxxx> Date: Mon, 1 Feb 1999 13:16:54 -0500 |
Hi Matthieu <YourComment> You've find the expression I was searching. In fact, I want to give the specification of the back end by translating the FOs with specs given into the XSL ss. I describe the process: Author ss Backend specific ss XML document ----------> FO document -------> Document The "Backend specific ss" would be able, through PIs, to translate FOs into the media selected. The selection of the output media would be selected by a second pass process with a specific XSL ss which correspond to this media. <Reply> Actual CSS2 specs (which I should say is of excellent quality) provide a mechanism to specify the media type inside a stylesheet. So maybe the thing to do would be to allow XSL and dsssl style sheets to contain PIs specifying the media type like in the following example: <?xsl:media="screen,application/tex"?> (I used Oren suggestion here). I guess that in this case we can use the xsl name space. For dsssl that would be <?media="screen,application/tex">. So tell me if I am right or wrong. The XML document tell to the document interpreter where is located the style sheet used to render it. <Question> In your approach, does the XML document specify only one style sheet or specify a set of style sheets, one for each media? <Question> Do you mean that the XML document specify one or several style sheets but each style sheet specify its own media type? <Issue> To define a set of style sheets specified up front in the XML document is useful for a document interpreter (ex: a browser) because it can from this list construct a rendering selection device (ex: a context menu) to allow the user to choose a particular operation and have this operation (i.e. selection) associated to a particular style sheet. For example, the default operation would be "display on the screen" but a menu allows the operation "print" which uses an other style sheet. When then have to include the list of PI in the XML document. If the media property is included in the XML PIs the browser has to parse the PIs anyway, so if the PI contains the media property, the association with rendering device and operation is completed. Otherwise further processing is required in the style sheet. However, having the media property may have the advantage to de-couple the rendering device from the original PI. <Conclusion> I guess the best thing would be to have both mechanism. a) the XML PI can include the media property b) or the XML PI only contain the style sheet location and type and a style sheet PI provide the media. What do you think? regards Didier PH Martin mailto:martind@xxxxxxxxxxxxx http://www.netfolder.com XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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