The integrator'd guide (from 4.0 to 6.5) lists integer as a supported data type. https://backstage.forgerock.com/docs/idm/6.5/integrators-guide/#creating-modifying-managed-objects
"The data type for the property value; can be string, array, boolean, integer, number, object, Resource Collection, or null"
However, creating a resource with such an integer property results in policy validation failure. To reproduce it, one needs to modify managed.json, because admin UI doesn't allow integer data type (