Subject: RE: Whitespace,xml:space,xsl:strip-space From: Kay Michael <Michael.Kay@xxxxxxx> Date: Fri, 23 Jun 2000 17:42:24 +0100 |
> Am I correct in saying that :- > > 1. the default parser behaviour Let's be clear here: we're talking about the XML parser, not the XSLT processor, OK? (ie. when have not set the > parser NOT to include whitespace or overidden > ignorableWhitespace with a noop) is for all whitespace, ie. > leading and trailing whitespace, and also carriage returns > etc. to be passed to the application. There are essentially three things an XML parser does with whitespace: - it normalises line endings to a single #xa character - it normalises whitespace in attribute values, depending on the attribute type - it distinguishes between whitespace in elements with element content and whitespace in elements with pcdata or mixed content. However, an XSLT processor ignores this distinction. > The latter becoming whitespace-only text nodes. This is now an XSLT (or XPath) concept rather than an XML concept. A Whitespace-only text node arises (only) when all the text between two tags is whitespace. > > 2. the effect of xml:space on whitespace-only text nodes > produced by the parser is that when xml:space ="preserve" > then the IsIgnorableWhitespace() method of these > whitespace-only text nodes will return false indicating that > they should not be discarded by the application; and when > xml:space="default" then the method will return false > indicating that can be discarded by the aqpplication. Which spec are we talking about now? Whitespace-only text nodes are an XSLT concept, xml:space is an XML concept, and the IsIgnorableWhitespace() method is heaven-only-knows what! > > 3. the xml:space attribute has no effect on leading or > trailing whitespace, eg. > <schedule> > <scheduleNumber xml:space="default"> 123456789</scheduleNumber> > </schedule> Correct. > > 4. xsl:strip-space can be used to strip leading and trailing > whitespace in a text node, but will not affect the white > space ONLY text nodes. Wrong. xsl:strip-space removes whitespace-only text nodes, it has no effect on nodes that are not whitespace-only. > > 5. Could someone please provide an example(s) of the above, > including where > exactly to put the xsl:strip-space and xsl:preserve elements. > XSLT Programmer's Reference by yours truly, pp 129-135 and 265-269. Mike Kay XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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