Document View Mechanism

• I have several different grids attached to a document. As soon as I change data in one of my grids, a hint is sent to all other grid views and they get updated (although the change should not affect this other grid views at all). How can I avoid this?
  
  
• How can I transfer data between the grid and the document when I am using other views (e.g.  a hierarchy chart) and need to update all view when a cell value has changed?
  
  
• How can I change the grid data from the document when no grid view is attached to it?