Discuss optional interfaces per @dete advice

References: ethereum/EIPs#165 (comment)
enjin-io · Feb 13, 2018 · 6d719f2 · 6d719f2
1 parent eb7f618
commit 6d719f2
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/EIPS/eip-165.md b/EIPS/eip-165.md
@@ -51,7 +51,9 @@ contract Selector {
 }
 ```
 
-Note: interfaces do not permit optional functions, therefore, the interface identity will not them.
+Note: interfaces do not permit optional functions, therefore, the interface identity will not include them.
+
+Note: an ERC standard may define multiple interfaces to separate core functionality from optional features. For example, [one draft standard defines](https://github.com/ethereum/EIPs/pull/841) ERC721, ERC721Metadata and ERC721Enumerable interfaces.
 
 ### How a Contract will Publish the Interfaces it Implements