CONTROLLING ACCESS TO DOCUMENTS USING FILE LOCKS Russian patent published in 2013 - IPC G06F21/44 

FIELD: information technology.

SUBSTANCE: system includes one or more document files (304) stored on a document server (104), a document access processing module (302), having a file sharing processing module (402) that determines a coauthoring status of a software application (202, 204) of a client computer, a file lock processing module (404), wherein the document access processing module uses the coauthoring status of the software application (202, 204) and the file lock status of a document file (304) to determine whether the software application (202, 204) is permitted to have write access to the document file (304).

EFFECT: providing backward compatibility when controlling access to a document file by a plurality of applications.

11 cl, 6 dwg