Google syndication

Can someone explain to me what’s going on with Google’s syndication protocol? It enables queries to a data base:

GData provides a general model for feeds, queries, and results. You can use it to send queries and updates to any service that has a GData interface. Syndication is an effective and popular method for providing and aggregating content. GData provides a way to expand the types of content that Google can make available through syndication; in particular, it lets you use the syndication mechanism to send queries and receive query results. GData also lets you send data to Google, and update data that Google already has. Is it going to cause confusion in the marketplace? Does it provide something new that’s useful? What are the uses? How does it compare with Ray Ozzie’s two-way-syndication protocol?