| 6. Agent to Agent (A2A) Communications Protocol | |
| 5. Agents and Service Endpoints | |
| 4. DID Document Data Model | |
| 3. Verifiable DID Layer: (DID, Keys) => Verifiable NYM Transaction (or equiv) | |
| 2. DID Private/Public Key Pairs and Wallets | |
| 1. DID Identifier Data Model: DID Syntax | |
| Indy Agent-2-Agent Communication HIPEs | |
| DID Resolution Specification | |
| DID Specification | |
| HTTP, FTP, SMTP, etc. protocols | |
| DNS (Domain Name Resolution) protocol | |
| IP Addresses, TCP-IP and related protocols | |
