Subject: Re: [xsl] Newbie question, commenting out an element From: Deborah Pickett <debbiep-list-xsl@xxxxxxxxxx> Date: Sun, 21 Dec 2008 18:05:42 +1100 |
Hi Douglas, Douglas Wade wrote: > <applic><assert></assert></ > applic> > to > <!-- <applic><assert></assert></applic> --> The reason this isn't working for you is that XSLT doesn't produce serialized XML (at least, not directly). It produces a result tree (think of something like a DOM tree), which is serialized to XML by another agent*. In other words, XSLT works on elements and nodes, not tags and text. It's not allowed for an XML result tree to have comment nodes (made with <xsl:comment>) with child nodes other than text. If you try something like <xsl:comment><xsl:element name="foo"/></xsl:comment> you will get an error reminding you of this. That said, there are a couple of ways you can do this. One is to not use XSLT at all, and treat this as a text-substitution problem to be done in a general text-processing language like Perl. The other is to use an XPath extension function such as saxon:serialize(), which can turn an XML result tree into a string that represents the tree, which you can then stick into your output with <xsl:value-of>. Whichever way you go, you will need to ensure that the comment never contains the sequence of characters "--", which is forbidden in XML comments to prevent the possibility of comments nesting. * That agent is usually your XSLT processor, after it has finished processing the stylesheet, but XSLT processors don't have to do this.
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