From fee9d495a8f70e9e8b44ae5307e25c3f20cc08ec Mon Sep 17 00:00:00 2001
From: Jacek Generowicz <jacg@my-post-office.net>
Date: Fri, 19 Aug 2022 09:10:36 +0200
Subject: [PATCH] Doc-comment for mmps

---
 units/src/lib.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/units/src/lib.rs b/units/src/lib.rs
index 5bbfaa67..98e581f8 100644
--- a/units/src/lib.rs
+++ b/units/src/lib.rs
@@ -29,6 +29,9 @@ pub type InvertDimension<D> = uom::si::ISQ<
     <<D as Dimension>::N  as uom::lib::ops::Neg>::Output,
     <<D as Dimension>::J  as uom::lib::ops::Neg>::Output>;
 
+/// A system of units with millimetres and picoseconds replacing the default
+/// metres and seconds as the base units of `Length` and `Time`
+/// Useful for bitwise compatibility with data generated by Geant4.
 pub mod mmps {
 
   use uom::si::{