Patent ID: 7152201
Filing Date: 2006-12-19
Classification: G06F,Y10S

Abstract:
1. A computer implemented write control method of exclusively controlling write requests from a plurality of user terminals to an identical structured document, wherein the identical structured document includes a plurality of elements each containing document content, the method comprising: setting a field information that indicates a monitor field in units of the elements within the identical structured document; storing the identical structure document in a storage device; reading out the identical structured document from the storage device in response to read-out requests from the user terminals, and outputting the document thereto; receiving a write request from the user terminals, the write request including a difference document and different field information that indicates a field in the identical structured document; determining if the write request is directed to the document content under monitoring by referral to the monitor field; denying the write request to prevent overwriting of the document content, if the document content has been rewritten by a previous write request; and writing the difference document extracted from the write request into the field indicated by the different field information of the identical structured document stored in the storage device, if the write request has not been denied.