Changing Content Types That Are in Use
Most changes you make to content type definitions will be made during the publication design phase before it is in active use. Occasionally, however, you may need to update content types that are in active use in a live system. For publications that are actively updated 24/7 there may be little or no opportunity to stop all editing activity while the change is made.
The precise consequences of changing a content type that is in use depends on which of the following three classes the change belongs to: