A modular document is composed of plural parts, where 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, it is determined based on the access right policy whether content of the particular part is accessible in an electronic device. In response to determining that the content of the particular part is inaccessible in the electronic device, an access mechanism associated with the particular part is accessed to determine an action to take with respect to the particular part when presenting the modular document.