I've just published draft #13 of SRFI 122. It was submitted
by Bradley J. Lucier, the author of the SRFI.

http://srfi.schemers.org/srfi-122/

Here's the diff:

https://github.com/scheme-requests-for-implementation/srfi-122/pull/12/files

Here are the comments Bradley included with his pull request:

Generally:

Address comments of

http://srfi-email.schemers.org/srfi-122/msg/4288201
[comments by Sudarshan S Chawathe from 25 Sep 2016]

Add array-sample and the associated interval-scale.

Add array-reverse.

Remove interval-reduce.

Replace array-reduce with array-fold and array-fold-right (which
can provide the functionality of the old interval-reduce).

Add back interval-lower-bounds->list and
interval-upper-bounds->list. (It required too many contortions to
program withouth them.)

generic-arrays.scm:

Add interval-scale.

Remove interval-reduce. Replace internal procedure
##interval-reduce with ##interval-fold.

In array->specialized-array, special case when
result-storage-class is generic-storage-class, for which the
checker always returns #t.

Update error messages and checking throughout.

Add array-reverse.

In ##specialize-function-applied-to-array-getters, add case of
function applied to four array getters.

Remove array-reduce, add array-fold, array-fold-right.

test-arrays.scm:

Check for updated error messages across many functions.

Remove tests for interval-reduce.

Add generator random-nonnegative-interval, random-positive-vector,
and random-boolean.

Use array-fold instead of interval-reduce throughout.

Add array-fold and array-fold-right tests.

Add interval-scale and array-sample tests.

Add array-reverse tests.

Use array-fold rather than array-reduce in array-sum and
array-max.

Use array-sample in 1D-Haar-transform and
1D-Haar-inverse-transform.

Test Haar examples on mutable as well as specialized arrays.

Add some timings for larger 2D Haar transforms.

srfi-122.scm:

Small changes throughout section on "Common transformations on
Bawden-style arrays"; add list items for array-reverse and
array-sample in this section.

Remove early, small, odd section on "Examples of application
areas".

Make clear that immutable multi-valued arrays would be a
compatible extension to this SRFI, but the notation doesn't allow
multi-valued mutable arrays.

Remove interval-reduce from, and add interval-scale to list of
interval routines.

Remove array-reduce from, and add array-fold, array-fold-right,
array-reverse, and array-sample to list of array routines.

Use more tags where appropriate. Use tag with

around code.

Replace left-dimension with right-dimension in various places
discussing array-curry.

Remove interval-reduce.

Add interval-scale.

Rearrange order of some functions.

Add array-reverse, array-sample, array-fold,
array-fold-right. Remove array-reduce.

12: Use array-sample in the Haar example.

Update draft number.

Add array-every?

Add back interval-lower-bounds->list and
interval-upper-bounds->list.

srfi-122.html:

Update from srfi-122.scm.

Thank you, Bradley and Sudarshan.

Regards,

SRFI Editor