How do you access an element by its attribute value using XSL transforms and XML?

Question

Im trying to transform an XML document into XHTML using XSL transformation and was wondering how i can choose an XML element given the value of its attribute. e.g.

<image size="small">http:example.small.jpg</image>
<image size="medium">http:example.medium.jpg</image>
<image size="large">http:example.largw.jpg</image>

I only want to access the value "http:example.medium.jpg" from the image tag where size="medium".

Any help is greatly appreciated.

Ally

Answer 1

<xsl:value-of select="image[@size='medium']" />