There are two main ways of representing an absent value in XML. The relevant
element might be omitted entirely, or it might be present with empty
content. (There's a third way, the xsi:nil attribute, but I don't think
anyone uses it.) To answer your question we need to know what the XML looks
like, and what $v1 is.
Michael Kay
http://www.saxonica.com/
-----Original Message-----
From: Oleg Konovalov [mailto:olegkon(_at_)gmail(_dot_)com]
Sent: 24 July 2006 20:41
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Comparing to SQL NULL
Hi,
I am writing some XSL code processing database columns
(actually, adding a new column to the existing table in old
application) and need to handle a situation when the column
does not have a value yet.
So how do I express that condition in XSL:
<xsl:when test="$v1 = 'NULL'">
... do something
</xsl:when>
or <xsl:when test="$v1 = 'NaN'">
... do something
</xsl:when>
or <xsl:when test="$v1 = ''"> ... blank string: ''
... do something
</xsl:when> ???
Please help.
Sorry for the newbie question.
Using XSLT1.0 [and Cocoon 2.0.x]
Thank you,
Oleg.
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