When using message definitions there's no easy way to sort the selected/used attributes. Currently the attributes are shown and used in de export/import mapping in the order they are added to the message definition (or so it seems). Sometimes when adding attributes in a later stage, the end up at the bottom of my JSON file. But I would like have some influence in the order of the attributes or associations of the message definition so I can style my response and group attributes together in a logical and readable way. Don't know if this would be easier done in the message definition, our in the import/export mapping, but please let me make some sense somewhere of my JSON.