Subject: Re: [xsl] Choose Test for Emtpy element From: Mike Brown <mike@xxxxxxxx> Date: Fri, 14 Mar 2003 11:16:25 -0700 (MST) |
Karl Stubsjoen wrote: > I am performing a CHOOSE | WHERE | OTHERWISE when, not where :) > ... the test for this choose is > to see whether or not my @AvailableInventory is '' (empty). It doesn't seem > to work, but indeed there is no real value in this attribute. I'm thinking > it is padded with spaces. So how would I perform my test, but trim all the > spaces... or is there another test for "Empty"? > Here what I have so far: > > <xsl:when test="@availableInventory=''"> Use <xsl:when test="normalize-space(@availableInventory)"> The normalize-space function will produce a string with leading and trailing whitespace removed, and adjacent embedded whitespace collapsed to a single space. A string will test false if it is completely empty (zero length). You could also use string(@availableInventory) if you don't need to strip whitespace. You probably noticed that test="@availableInventory" was always true when there was an availableInventory attribute; this is testing a node-set to see if it has any nodes in it. Mike -- Mike J. Brown | http://skew.org/~mike/resume/ Denver, CO, USA | http://skew.org/xml/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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