# Dynamic replace value
Permissionset is setup like this, using the variable {MatterContributors}
But the property MatterContributors has a configuration to replace the values:
- There’s an empty mapping configured, so if the value is empty use the value DMS Users
- For all other values that are not configured use a value DMS {PracticeArea} (see Unknown value configuration)
When the permissionset is handled via the client matter json this results in a new value DMS Taxlaw (if the value for the variable PracticeArea = Taxlaw)