Create new namespace
In Apis Hive, namespaces are hosted in a module called ApisSemantics. In order to create a new (empty) namespace in the UA server, an instance of the ApisSemantics module must be created in Apis Hive. See "Adding a Module" on how to add a module to Hive.
In the Add a Module dialog, ApisSemantics is located in the Others group. Give the module a name and press Add.
A new dialog appears, giving you the opportunity to manipulate properties for the module. Setting the Uri is the most important step at this point. For a description of all properties, see ApisSemantics properties.
Press Apply, and the new namespace is added to the UA server.