A Taxonomy of Data Definition Languages.

http://doi.acm.org/10.1145/984409.984410 db/journals/sigmod/Olle69.html T. William Olle A Taxonomy of Data Definition Languages. 24-28 sigmodR/01-1/P024.pdf 1969 1 FDT - Bulletin of ACM SIGFIDET 1 db/journals/sigmod/sigmod1.html#Olle69