xml:lang attribute

[MrTom]

i'm working with an xml file which has the tag

<post xml:lang=&quot;EN&quot;>

in my xslt i need to reference this through xpath by doing something similar to

select=&quot;post[@xml:lang='EN']&quot;

but this doesn't seem to find it.

what does this : do for attributes? it can't be a namespace can it?

TIA!