[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Namespace declaration - good practise
Thanks a lot to all of you. Best regards, Christophe Le 26/04/2019 à 21:16, Liam R. E. Quin a écrit : On Fri, 2019-04-26 at 16:17 +0200, Christophe Marchand wrote:[...] So, I'd like to declare namespaces strings as constants, and use these constants in XSL. The only way I've found is to declare a DTD with entities, one entity per namespace : Then, use this DTD in my XSL : <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE xsl:stylesheet SYSTEM "../../namespaces.dtd"> <xsl:stylesheet xmlns:xf="&nsXF;" xmlns:added="&nsAdded;" ...>You could instead write, <!DOCTYPE xsl:stylesheet [ <!ENTITY % nsdecl SYSTEM "../../namespaces.dtd"> %nsdecl; ]> at the start of your document, but the way you did it seems cleaner. You could make #FIXED attributes for xsl:stylesheet that insert the declarations automatically, although that would probably require that the XSLT processor perform DTD validation, and DTD-validation for XSLT stylesheets might end up being an ongoing maintenance burden because of direct element constructors & extension attributes.Am I the only guy to do this ? Is it a good practise ?You are not alone and it’s p perfectly fine thing to do. It might be worth asking why you need so many namespaces. Can you combine some of them? You could hav an XSLT stylesheet that did this and even call it from XSLT with fn:transform() if needed, in a library function. It’s also possible, at least in principle, to remove the namespaces and make a “flattened” document, possibly even with “standard” prefixes so you end up with <els-esclave> instead of Els:esclaeve, or whatever, and split them out again at the end of procesing. What such techniques do is they move the complexity from one place to another. It’s a trade- off. XSLT 2 and 3, XPath 3, XQuery 3, all have features for making using namespaces a little easier, e.g. EQNames and wildcards, so i’d keep the namespaces there and i thinkyou’ve made a sensible design choice. Liam
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