11. A method comprising: opening a subject electronic document; detecting presence of a discuss attribute in the subject electronic document, the discuss attribute indicating that the subject electronic document is a message-enabled document and specifying a messaging protocol for initiating a real-time communication (RTC) session with respect to the message-enabled document; sending one or more open request messages inviting at least one user to join the RTC session with respect to the message-enabled document subsequent to the detecting of the presence of the discuss attribute in the subject electronic document; in response to receiving an open-reply message from a second electronic system associated with the at least one user, initiating the RTC session with the second electronic system utilizing the messaging protocol specified in the discuss attribute; and storing one or more RTC messages generated during the RTC session inside the subject electronic document.
11. A method comprising: opening a subject electronic document; detecting presence of a discuss attribute in the subject electronic document, the discuss attribute indicating that the subject electronic document is a message-enabled document and specifying a messaging protocol for initiating a real-time communication (RTC) session with respect to the message-enabled document; sending one or more open request messages inviting at least one user to join the RTC session with respect to the message-enabled document subsequent to the detecting of the presence of the discuss attribute in the subject electronic document; in response to receiving an open-reply message from a second electronic system associated with the at least one user, initiating the RTC session with the second electronic system utilizing the messaging protocol specified in the discuss attribute; and storing one or more RTC messages generated during the RTC session inside the subject electronic document. 19. The method of claim 11 , wherein the detecting that the subject electronic document is a message-enabled document includes parsing one or more properties associated with the subject electronic document to detect the discuss attribute.