A block layout generator produces {TAIL ~ interface objects} to be included within an interface of the database, wherein each of the interface objects corresponds to one of the block descriptions and includes a plurality of {HEAD ~ layout fields} 
A block layout generator produces { TAIL ~ interface objects } to be included within an interface of the database , wherein each of the interface objects corresponds to one of the block descriptions and includes a plurality of { HEAD ~ layout fields }
OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD