When several applications contribute to a pool

All declarations of pool variables in a pool must appear in the same application/subapplication subtree. Other applications cannot extend a pool by adding pool variables to it because this introduces a mutual dependency between applications.

There are several strategies to resolve cases where several applications contribute pool variables to a common pool.

•	Place the declarations for the pool and its pool variables in a common prerequisite application (perhaps a declarations-only application created for the purpose).

•	Subdivide the pool into several pools, each owned by one application, and change the class definitions to reference the appropriate subset of the pools.

•

Convert the pool into a variable containing a Dictionary (or LookupTable), and convert all references to pool variables to use explicit at: and at:put:. This conversion may significantly degrade runtime performance because it forces lookup operations to be done at run time rather that at compile time.