2. The document management system as claimed in claim 1 , wherein the document use managing apparatus comprises an updating unit that updates the use restriction information stored in the use restriction information storage.
2. The document management system as claimed in claim 1 , wherein the document use managing apparatus comprises an updating unit that updates the use restriction information stored in the use restriction information storage. 3. The document management system as claimed in claim 2 , wherein the updating unit, in accordance with invalidation instructions for specifying at least one of sets of use restriction information stored in the use restriction information storage, causes information indicating that the use restriction information specified by the invalidation instructions is invalid, to be stored into the use restriction information storage, and in a case where information indicating that the use restriction information associated with the document contained in the protected document specified by the use request is invalid is stored in the use restriction information storage, a use of the protected document which is an object of the request is not allowed.