From parsing several websites, it seems that with a "/" in the beginning of the link, it points to a different location than without. For example,
URL = "http://www.google.com/a/b/c/index.html"
<a href = "/location1.html">
will link to "http://www.google.com/location1.html", essentially (domain+link). And
<a href = "location2.html">
will link to "http://www.google.com/a/b/c/location2.html".
Is my understanding correct?