Data caching and annotation system with application to document annotation

摘要

A method comprises receiving, in an annotation server, a response for data being transmitted to a client from a remote server. Additionally, the addresses are modified in the response to point to the annotation server. The method also comprises modifying the response to include a number of annotations stored in the annotation server that the client has permission to view, wherein the number of annotations are associated with the response. Moreover, the method includes transmitting the response with the modified addresses and the number of annotations that the client has permission to view to the client.