3.2.4.1 Register SAO ServerType
When the higher-layer registers a Server Type with a Server Object URI and a Boolean value specifying whether the SAO is singleton, an implementation MUST do the following:
If the URI is already present in the Server Type Table or the Server Object Table, the implementation MUST notify the higher layer about the error.
If there were no errors then the implementation MUST add the Server Type, Server Object URI, and the boolean value to the Server Type Table.