docs: def from_urls(cls, urllist, coltype=LIGOTimeGPS):
  		"""
  		Return a Cache whose entries are inferred from the URLs
  		in urllist, if possible.  PFN lists will also work; for PFNs, the path
  		will be absolutized and "file://" and "localhost" will be assumed
  		for the schemes and hosts.
  		
  		The filenames must be in the format set forth by DASWG in T050017-00.
  		"""
  		def pfn_to_url(url):
  			scheme, host, path, dummy, dummy = urlparse.urlsplit(url)
  			if scheme == "": path = os.path.abspath(path)
  			return urlparse.urlunsplit((scheme or "file", host or "localhost",
  			                            path, "", ""))
  		return cls([cls.entry_class.from_T050017(pfn_to_url(f), coltype=coltype) \
  		            for f in urllist])