diff --git a/docs/schemas/resource/IfcMaterialResource/Entities/IfcMaterialConstituent.md b/docs/schemas/resource/IfcMaterialResource/Entities/IfcMaterialConstituent.md
index 2964a4e2a..2f3583784 100644
--- a/docs/schemas/resource/IfcMaterialResource/Entities/IfcMaterialConstituent.md
+++ b/docs/schemas/resource/IfcMaterialResource/Entities/IfcMaterialConstituent.md
@@ -18,7 +18,7 @@ Definition of the material constituent in descriptive terms.
 Reference to the material from which the constituent is constructed.
 
 ### Fraction
-Optional provision of a fraction of the total amount (volume or weight) that applies to the _IfcMaterialConstituentSet_ that is contributed by this _IfcMaterialConstituent_.
+Optional provision of a fraction of the total volume that applies to the _IfcMaterialConstituentSet_ that is contributed by this _IfcMaterialConstituent_.
 
 ### Category
 Category of the material constituent, e.g. the role it has in the constituent set it belongs to.