tsd:schema

The valid values for the use attribute are:

• "required"
  A schema is required for storing data in the collection specified by the parent tsd:collection element. Data cannot be stored in the collection without having previously defined a schema.

  Note:
  This is the default value. It corresponds to the behavior of collections in Tamino versions prior to version 4.2.

• "optional"
  A schema may be used, but is not required for storing data in the collection specified by the parent tsd:collection element. Both explicit and implicit creation of doctypes in the collection are permitted.

• "prohibited"
  A schema may not be used for storing data in the collection specified by the parent tsd:collection element. When storing data, a suitable internal schema is created automatically.