There is quite a lot about DBMS history in the Red Book and references therein: http://www.redbook.io/index.html http://www.redbook.io/index.html For the histo

There is quite a lot about DBMS history in the Red Book and references therein: http://www.redbook.io/index.html http://www.redbook.io/index.html For the history of data model proposals in particular, there is this paper: https://scholar.google.com/scholar?cluster=7366182905777149494 https://scholar.google.com/scholar?cluster=73661829057771494... So the info is definitely out there if you are interested in that sort of thing.