readOnly

Feature String: http://tmapi.org/features/readOnly

This feature indicates that the underlying TopicMapSystem cannot be modified.

If a TopicMapSystem is created with this feature set to true, then calls to any create...() add...() and remove() methods must result in no modification to any TopicMap managed by the TopicMapSystem and must cause an exception to be raise (for Java implementations, this should be the java.lang.UnsupportedOperationException).

If a TopicMapSystem is created with this feature set to false, then the TopicMapSystem must support all create...() add...() and remove() methods defined by the interfaces in the core package.