Undefined namespace prefix error when using xlink - image

Question

i have this xml :
<figure>
<objetmedia>
<image typeimage="figure" xlink:actuate="onLoad" xlink:href="picture-02.jpg" xlink:show="embed" xlink:type="simple"/>
</objetmedia>
</figure>
And i have this xsl script :
<xsl:template match="figure">
<figure>
<xsl:apply-templates select="objetmedia" mode="image"/>
</figure>
</xsl:template>
<xsl:template match="objetmedia" mode="image">
<img src='{image/#xlink:href}' />
</xsl:template>
But i have this error :
Warning: XSLTProcessor::transformToXml(): Undefined namespace prefix
Warning: XSLTProcessor::transformToXml(): xmlXPathCompiledEval:
evaluation failed Warning: XSLTProcessor::transformToXml(): runtime
error: file script.xsl line 154 element img Warning:
XSLTProcessor::transformToXml(): Internal error: Failed to evaluate
the AVT of attribute 'src'.
Why ?

Answer 1

You need to declare the xlink: namespace prefix in your stylesheet, and bind it to the same namespace uri as the original document uses. You haven't shown the part of your input document that includes the namespace declaration, but if it's the standard XLink namespace then you'd need to add
xmlns:xlink="http://www.w3.org/1999/xlink"
to an appropriate place, usually your xsl:stylesheet tag.
The point is that XPath expressions and match patterns use the prefix bindings of the stylesheet, not of the input xml document. What matters for the matching is the namespace uri and the local name. Your stylesheet could equally well declare xmlns:x="http://www.w3.org/1999/xlink" and then look for #x:href - as long as the namespaces match it'll find the right thing.