Systems and methods for sharing information

摘要

Techniques are provided for creating and sharing information about arbitrary documents. A primary document is selected and a document content identifier generated based on the content of the primary document. Additional information such as comments, additional documents, reviews and the like are created and/or selected from an information repository. The additional information is associated with the primary document based on the document content identifier of the primary document. A search for information associated with the primary document compares the document content identifier of the primary document to document content identifiers associated with the additional information. Additional information associated with the document content identifiers matching the primary document content identifier is retrieved and displayed to the user.