17. A system according to claim 9 , wherein the computing device comprises a computing device operated by an employee of an entity; and Wherein the second party is a customer of the entity and the third party is a manager of the employee of the entity.
9. A system comprising: a computing device operated by a first party and comprising: a memory system storing processor-executable program code; and a processor to execute the processor-executable program code in order to cause the computing device to: create a business document, the business document comprising an instance of a software model representing a real world entity involved in a business transaction; generate a markup language representation of the business document based on a business object model implemented by a business application platform; generate a first multi-part Multipurpose Internet Mail Extension (MIME) electronic mail message comprising a first part and a second part, the first part associated with a text content-type and the second part associated with an attachment content-disposition, and the second part comprising the markup language representation of the business document; transmit the first electronic mail message to: (i) a device associated with a second party and (ii) the business application platform associated with the business document and implementing the business object model, wherein the business application platform is to extract the markup language representation of the business document, instantiate a business object instance of the business document based on the markup language representation of the business document, and store the business object instance instantiated based on the markup language representation of the business document; receive a request for a modification to the business document; edit the business document; generate a second markup language representation of the edited business document based on the business object model; generate a second multi-part MIME electronic mail message comprising a third part, a fourth part, a second Content-ID identifying a sender of the second multi-part MIME electronic mail message, the filename of the business document and a second timestamp, the third part associated with the text content-type and the fourth part associated with the attachment content-disposition, and the fourth part comprising the second markup language representation; transmit the second electronic mail message to: (i) a device associated with a third party and (ii) the business application platform, wherein the business application platform is to edit a business object instance of the business document based on the second markup language representation; and receive, from the business application platform, verification that the third party has approved the business document.