Objects can be selected by querying the exists property using the selection criteria “e”. All objects that exist (i.e., have been created in the application) are selected. For example, in the following command, all existing objects are selected for use by the ZOMLIST service:

ZOMList +p e

In the next example, all objects that do not exist are selected:

ZOMList +p e!

You can also select objects that exist but are considered to be corrupt (i.e., out-of-date). An object is considered corrupt if it depends on another object which has been erased or moved to another directory. In the next example, all corrupt objects are selected:

ZOMList +p ec