Updated Data definition.

arc722/README.md

@@ -1,10 +1,12 @@
-# aleo-std-proposals
+# Aleo NFT Registry
 
-Leo 2.0 proposals for Aleo standards.
+ARC722 defines a registry for NFTs to extend ARC721 standard, as ARC21 does for ARC20 fungible tokens.
 
-Including:
+More over, ARC722 can be implemented with any 'Data' struct, allowing abitrary on-chain NFT data.
 
-- program authority
-- arc0020
-- arc0721
-- arc0721 royalty
+## Registry list enforcement
+
+1. Explorers could maintain a list of valid ARC722 implementations.
+2. Wallets could feature adding registry program, as metamask does for token contracts.
+
+Collections would then be identified by pairs: (registry_program_id, token_id).