The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
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.
Describes the model the paper proposed - "an approach to managing data using a structure and language consistent with first-order predicate logic... where all data are represented in terms of tuples, grouped into relations" - and its purpose, "to provide a declarative method for specifying data and queries".[1]
The author's article: "a British computer scientist who, while working for IBM, invented the relational model for database management, the theoretical basis for relational databases", and winner of the 1981 ACM Turing Award.[1]
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.
