Revised report version 7. The current scheme standardization. It proceeded R6RS which many felt was too large, and added too many things to the scheme standard (it’s only 90 pages long). R7RS was the compromise
Exactly. R7RS-small was meant to be a minimal core language, in the spirit of RnRS for n <= 5, whereas R7RS-large was meant to be a fairly complete set of standard libraries.