diff --git a/absrel/src/abs.rs b/absrel/src/abs.rs
index b043ce6..1e7a997 100644
--- a/absrel/src/abs.rs
+++ b/absrel/src/abs.rs
@@ -1,3 +1,4 @@
 /// This type represents an absolute value, such as a coordinate for a world position.
 /// This is called a euclidean point in Geometric Algebra.
+/// The most appropriate type here is a fixed-point value.
 pub struct Absolute<T>(T);
diff --git a/absrel/src/rel.rs b/absrel/src/rel.rs
index 3778b34..13ead80 100644
--- a/absrel/src/rel.rs
+++ b/absrel/src/rel.rs
@@ -4,4 +4,5 @@
 /// implement your number-crunching logic using this type.
 /// Once the calculation is complete, it can be added to an absolute value
 /// with the effect of offsetting the value to a new absolute value.
+/// The most appropriate type here is a floating point value.
 pub struct Relative<T>(T);