Subject: Peculiar variable assignment From: Jeni Tennison <Jeni.Tennison@xxxxxxxxxxxxxxxx> Date: Tue, 23 May 2000 12:24:23 +0100 |
Hi, In answering Cheun Ngen CHONG's question about comparing dates, I ran into a couple of problems that have left me puzzled (other one is in separate email). I had to convert a date in a string in the form "23 May 2000" into a number twice, once for a parameter passed into the stylesheet, and once for the value of a BESTBEFORE element. Part of that involved converting the month name into a month number. In doing this, I came across a discrepancy that probably has something to do with the differences between the values of node-lists and strings, but that I really don't understand, viz: <xsl:variable name="bbString" select="BESTBEFORE" /> <xsl:variable name="bbMonth" select="document('')//foo:month[@name = substring-before(substring-after($bbString, ' '), ' ')]/@num" /> gives $bbMonth = "05" whereas: <xsl:variable name="bbMonth" select="document('')//foo:month[@name = substring-before(substring-after(BESTBEFORE, ' '), ' ')]/@num" /> gives $bbMonth = "", as does: <xsl:variable name="bbMonth" select="document('')//foo:month[@name = substring-before(substring-after(string(BESTBEFORE), ' '), ' ')]/@num" /> Please could someone explain this discrepancy to me. I'm using Instant SAXON v.5.3.1, if that makes any difference. Thanks, Jeni Dr Jeni Tennison Epistemics Ltd, Strelley Hall, Nottingham, NG8 6PE Telephone 0115 9061301 ? Fax 0115 9061304 ? Email jeni.tennison@xxxxxxxxxxxxxxxx XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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