# rule

Tag: rule

Defines a new namespace rule. A rule defines a translation between system namespace and the defined namespace, and vice versa.

See the namespace doc for details.

## Child elements

Element | Description | Cardinality
--- | --- | ---
fromsystem | defines the translation to apply from the system namespace to the defined namespace | 1
tosystem | defines the translation to apply from the defined namespace to the system namespace | 1