1. A method comprising: receiving, by an electronic device, a modular document that is composed of plural parts, wherein at least a particular one of the parts is associated with an access right policy that restricts access to the particular part; in response to a request to access the modular document, determining based on the access right policy whether content of the particular part is accessible in the electronic device; in response to determining that the content of the particular part is inaccessible in the electronic device, accessing an access mechanism associated with the particular part to determine an action to take with respect to the particular part when presenting the modular document; and modifying the content of the particular part using the access mechanism, wherein the modifying is selected from among producing a summary of the content of the particular part and adding an annotation with respect to the particular part.