Data Management Metadata Aggregation Properties

Summary:

What is the correct map for metadata build aggregation property "Not used for Cube"

Content (required):

Using data management for dimension metadata updates. When setting aggregation to addition, we map to '+'. Similarly, subtraction is '-'. I believe other valid values are * / ~ ^. What should be submitted for not used?

Version (include the version you are using, if applicable):

PBCS

Code Snippet (add any code snippets that support your topic, if applicable):