http://www.intellij.net/tracker/idea/viewSCR?publicId=16754
Given the XML document below, I'd like to position the cursor on one of the idref attributes, and then 'go to' the corresponding element with the matching id. Currently the only 'go to' option was 'Go To Declaration', which took me to the DTD.
<!DOCTYPE test [
<!ELEMENT test (test)>
<!ATTLIST test id ID #REQUIRED
idref IDREF #REQUIRED>
]>
<test id="4" idref="10">
<!-- ..lots of markup.. -->
<test id="10" idref="4"/>
</test>
(Incidentally, I also noticed that IDEA didn't flag up duplicate ids as an error when they occurred...)