http://doi.acm.org/10.1145/800296.811501 db/conf/sigmod/Claybrook74.html Billy G. Claybrook A File Definition Facility for File Structures. 1-14 SIGFIDET74-1/P001.pdf 1974 conf/sigmod/74 SIGMOD Workshop, Vol. 1 db/conf/sigmod/sigmod74-1.html#Claybrook74