1) use https://issues.jboss.org/browse/JBIDE-10173 as example project;
2) add org.jboss.tools.jsf.jsfnature and org.jboss.tools.jst.web.kb.kbnature to the project;
3) open stopka-ui-test\src\main\webapp\test.jspx in VPE;
4) use Ctlr+LMouse click on <utils:common-head-data/> to open corresponding tld file;
5) utils.tld is opened;
6) try to open

<path>/META-INF/tags/utils/common-head-data.tagx</path>

by Ctrl+LMouse click - it does not work.
Should be possible to open common-head-data.tagx.