Within a COinS span, there may be an anchor (<a>) that links to the URL of the article referenced. See for example the reference at the end of this blog post:

http://xcorr.net/2013/01/24/categories/

It's straightforward to:

1. read the hrefs of these anchors
   
2. add them in the URL field of the added item and
   
3. add snapshots of the URLs in question to the added item
   

Currently the only snapshot which is attached is the one from the referring URL; more useful is the snapshot of the URL of the article. I think this is a useful improvement.

Sample implementation (only attaches last URL within the span):

in doWeb:

var theas = doc.evaluate('.//a[@href]', span, nsResolver, XPathResult.ANY_TYPE, null);
while(thea = theas.iterateNext())
{
newItem.URL = thea.href;
}


in completeItems, in the else clause:


if(newItems[i].URL)
{
newItems[i].attachments.push({title:'[Original article] ' + newItems[i].title,url:newItems[i].URL,mimeType:'text/html'});
}