Dictionary :: extentDefinitionCount - Number of extent definitions

The property provides the number of extent definitions currently stored in the internal dictionary. The internal dictionary contains built-in extent definitions and application extent definitions, which have been read so far, i.e. the internal dictionary usually does not provide all extent definition.

While running a dictionary, the number of extents may grow, but extent definition loaded once are removed only, when the internal dictionary (dictionary node) will be destroyed.