{HEAD ~ Access} to content is enabled based on {TAIL ~ user manipulation} of the configured user interface 
is enabled based on
{ HEAD ~ Access } to content is enabled based on { TAIL ~ user manipulation } of the configured user interface
HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH