In particular, the invention relates to maintaining {HEAD ~ profiles} of {TAIL ~ information channels} on the Web 
In particular , the invention relates to maintaining { HEAD ~ profiles } of { TAIL ~ information channels } on the Web
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH