@Override
  public List<String> getUrlFor(PsiElement element, PsiElement originalElement) {
    element = getMavenElement(element);
    if (element == null) return null;
    if (MavenDomUtil.isMavenProperty(element)) return Collections.emptyList();

    // todo hard-coded maven version
    // todo add auto-opening the element's doc
    //String name = ((PsiNamedElement)element).getName();
    return Collections.singletonList("http://maven.apache.org/ref/2.2.1/maven-model/maven.html");
  }
@Override
  public List<String> getUrlFor(PsiElement element, PsiElement originalElement)