IBM Almaden Research Center, 650, Harry Road, IBM Almaden Research Center, San Jose, Santa Clara County, California, 95120, United States
IBM
ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins65% CONFIDENCEOverall confidence: 65%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% confidence
The paper's own header gives the issue and no day: Communications of the ACM, "Volume 13 / Number 6 / June, 1970". A month with no day is estimated at that month's last day.[1]Ted Codd's paper in Communications of the ACM proposes storing data as relations queried by predicate logic, independent of how it is laid out on disk. It is the founding document of the relational database and of SQL.
1.00