SRFI 251 is now in final status. Scheme has traditionally required procedure bodies and the bodies of derived constructs such as let to contain definitions followed by commands/expressions. This SRFI proposes to allow mixing commands and groups of definitions in such bodies, so that each command/expression is in the scope of all local definition groups preceding it, but not in scope of the local definition groups following it. This approach is backwards compatible with R7RS and upholds the in...