avoiding NaN-result in string processing due to missin
Dear List, I'm working with XSLT 2.0 and Saxon 8B to process Adobe XMP-format image meta data for display in HTML. I'm using Oxygen 7.1 to work it out. XMP stores numerical values as Strings, e.g. <tiff:XResolution>2400000/10000</tiff:XResolution> and I managed to work out how to convert such a string into a useful number: <xsl:value-of select="format-number(number(substring-before((rdf:Description/(tiff:XResolut ion | @tiff:XResolution)), '/')) div number(substring-after((rdf:Description/(tiff:XResolution | @tiff:XResolution)),'/')),'#######.')"/> The problem is: If the element (or attribute, both are allowed in XMP) does not exist, the result I get in NaN (not a number). A possible solution is to query for the element/attribute first <xsl:if test="rdf:Description/(tiff:XResolution | @tiff:XResolution)"> <xsl:value-of select ... </xsl:if> Is there another way to do this? Thanks. I'm on the digest version of the lists, so I cannot answer questions until tomorrow. Regards CJ
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