{HEAD ~ These operations} include identifying a source data structure and {TAIL ~ a source attribute} associated with the source data structure and identifying a destination data structure and a destination attribute associated with the destination data structure 
include identifying
{ HEAD ~ These operations } include identifying a source data structure and { TAIL ~ a source attribute } associated with the source data structure and identifying a destination data structure and a destination attribute associated with the destination data structure
HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH