1. A method for synchronizing a client having a client database with a server having a server database, the method comprising: calculating at the server database, for a plurality of times and a plurality of clients, a document score for each document in a plurality of documents in the server database, each document score designating an importance relative to other documents of a respective one of the documents to a respective one of the clients at one of the times, each document score indicative of whether the document should be synchronized between the respective client and the server database, wherein calculating the document score includes determining whether a relationship exists between the respective one of the documents and another of the documents in the server database; initiating a synchronization task at one of the clients, the synchronization task for updating documents in the client database to match documents in the server database, the synchronization task specifying a threshold value that indicates the document score value for a document to be synchronized, and identifying the server and the server database for synchronization; sending from the identified server and server database to the client a list of server documents produced based upon a comparison of the threshold value to the document scores; and sending from the client to the identified server a fetch list based upon the list of server documents; transmitting one of the documents in the server database to the client based on the fetch list.
5. The method of claim 1 further comprising: determining if the client database includes a newly created document; and transmitting the newly created document to the server.