===== Proposed public API =====

  

    integra_bridge.h        ::all structs and functions

    integra_definition.h    ::all structs except ntg_module_attribute
                            ::ntg_definition_new()
                            ::ntg_definition_free()
                            ::ntg_get_loaded_definition_ids()
                            ::ntg_get_definition_by_name()
                            ::ntg_uris_alloc()
                            ::ntg_uri_new()
                            ::ntg_uri_assign()

    integra_instance_host.h ::ntg_server_new()

    integra_serialize.h     ::ntg_xml_doc
                            ::ntg_xml_document_save()
                            ::ntg_xml_document_new_from_file()
                            ::ntg_xml_deserialize()
                            ::ntg_xml_serialize()
                            ::ntg_xml_serialize_collection()
                            ::ntg_xml_document_new()
                            ::ntg_xml_document_free()
                            ::ntg_xml_document_dump()
                            ::ntg_xml_document_string_free()