Systems and methods for establishing a bridge between two documents on a server are provided, including receiving, at the server, a first document represented by a hierarchical data structure model having a plurality of first nodes, generating, by a processor, a second document represented by a flat data structure model having a plurality of flat data structure elements, and establishing, by the processor, the bridge between the first document and the second document. Establishing the bridge includes linking each of the plurality of first nodes to the plurality of flat data structure elements, and maintaining the bridge, such that an edit to the first document, represented in at least one of the first nodes, is applied to at least one corresponding flat data structure element, thereby applying the edit to the second document.