• Agents and Ether Agents -- mediators for data services.

• Agent Resource Locator (ARL) extends URL:
  < agent-locator,object-locator >.

• Locators also extend URLs with a Query Mechanism -- KQML or SQL.

• Data services functions are encapsulated as projection operations or "projectors" in a Geo-Model Server (GMS).

• Multi-Flow Synchronization protocol developed at BBN.

• The Digital Silk Road proposal for fine-grained accountability.