SAGE Knowledge translator (new)

Sample URL:
http://knowledge.sagepub.com/view/10-winning-strategies-for-leaders-in-the-classroom/SAGE.xml?rskey=yrcpOl&row=1
fine as is, but FYI, you can do
```
var itemType = ZU.xpathText(...)
  || ZU.xpathText(...)
```