Relational Data File is a historical query language created in 1965.
- Relational Data File does not currently rank in our top 50% of languages
- Relational Data File first appeared in 1965
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Example code from the web:
IF (x AUTHORED PAPER y) AND (y SUBJECT INDEXED UNDER pattern recognition) THEN (x CONDUCTS RESEARCH ON pattern recognition)
Last updated December 4th, 2019