This is a draft of proposals for the Red Edition (data structures) of R7RS-large. For other dockets, see WG2Dockets.
List library: SRFI 1.
Sets and bags: SRFI 113.
Character sets: SRFI 14.
Hash tables and bimaps: HashTablesCowan.
Immutable pairs and lists: SRFI 116.
Random access pairs and lists: SRFI 110.
Immutable cyclic lists: CyclesMedernach.
Immutable deques, sets, and maps: ImmutableDataStructuresWortman.
Lazy sequences: LazySequencesCowan.
Streams: SRFI 41.
Boxes: SRFI 111.
List queues: SRFI 117.
Binary heaps: BinaryHeapsCowan.
Comparators: SRFI 114.
Enumerations with sets and maps: EnumsCowan
Extended records: SRFI 99, possibly with simplified syntax.
Ternary search trees: No API proposal yet, but see Wikipedia.