BS1192:2007+A2:2016 States that a drawing number should be a combination of separate fields. Project Code - Originator-Zone/System-Levels/Location-Type-Discipline-Sequence Number. So why does Revit only allow the use of the Sheet number parameter to sort in the browser and across the project I may have the same sequence number across multiple zones or levels yet Revit will not allow that to happen. Please, could you allow us a function to use the parameters that we use to set up the sheet to be used in a way that would allow a unique reference across the project but still allowing us to break down the drawing number for filtering and data manipulation.