Regular Expression using GREP for filtering

[dermotz]

Could guru who has grown up with perl be so kind as to tell a regular expression that would filter out every site from an rdf dump that does not

start with the requested url pattern, e.g. Top/Arts/Music/Metal in order to be able to build a directory which is a subtree of the whole big dump.

 

It probably just needs to evaluate everythign betwenn the start "<" and before the beginning of the next "<" and look at everything that starts with "Top" and ends with " and replace that by and empty string if it is not mtached.