Subject: RE: [xsl] xsl:namespace From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Fri, 20 Feb 2009 17:49:03 -0000 |
In the case of QName-valued attributes (of which xsi:type is a well-known example), xsl:namespace is needed if (A) the namespace prefix or URI is decided dynamically, or (B) if the containing element is constructed using xsl:element. But there's nothing wrong with using it in other cases too. Another use case for xsl:namespace is to promote a namespace declaration to the root element of a document to avoid the clutter caused when it appears on hundreds of child elements. Again, xsl:namespace is needed only if the root element is created using xsl:element or if the namespace URI or prefix is computed. Michael Kay http://www.saxonica.com/ > -----Original Message----- > From: Jesper Tverskov [mailto:jesper.tverskov@xxxxxxxxx] > Sent: 20 February 2009 17:33 > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > Subject: Re: [xsl] xsl:namespace > > I use the xsi:type example because that is the one we have in > the spec, http://www.w3.org/TR/xslt20/#element-namespace, and > the one Michael Kay is using in "XSLT 2,0 and XPath 2.0", 4th > Edition, page 392. But the problem with the examples in the > spec and MK are, that xsl:namespace is not really needed. The > spec admits that an xsl:element example would have been more > appropriate. > > So I kept the literal not so good example of spec and MK as > alternative 2 but I removed xsl:namespace. Then I added an > example with xsl:element, alternative 1, and I added a > dynamic one, alternative 3. > > But the two proposals of Florent and Vladimir are basically > the literal example one more time where xsl:namespace is not > needed unless in a dynamic solution as in my alternative 3. > We could make Vladimir's dynamic but it will not make it less > artificial or confusing than my own example. Instead of the > xsi namespace we will get some other namespace. > > So wee still need some good examples of why xsl:namespace can > be necessary. I have provided a dynamic one where it is > necessary, and one using xsl:element, where xsl:namespace is > also necessary if xsl:element must be used (we might e.g. > need to compute the name of the element). > > > Cheers, > Jesper Tverskov > > http://www.xmlkurser.dk > http://www.xmlplease.com
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