This site is a static rendering of the Trac instance that was used by R7RS-WG1 for its work on R7RS-small (PDF), which was ratified in 2013. For more information, see Home. For a version of this page that may be more recent, see AssociationListsCowan in WG2's repo for R7RS-large.
This proposal has been flushed. The only things it added were reverse-assoc and make-alist, which are trivially implemented using find and zip (more or less; zip won't make dotted pairs).