- u -

• unacknowledged_sample_count : DDS::ReliableWriterCacheChangedStatus
• unacknowledged_sample_count_peak : DDS::ReliableWriterCacheChangedStatus
• uncommitted_sample_count : DDS::DataReaderProtocolStatus
• unicast : DDS::DataWriterQos , DDS::DataReaderQos
• url_profile : DDS::ProfileQosPolicy
• use_42e_compatible_alignment : DDS::DynamicDataTypeSerializationProperty_t
• user_data : DDS::DataWriterQos , DDS::DataReaderQos , DDS::DomainParticipantQos
• user_multicast_port_offset : DDS::RtpsWellKnownPorts_t
• user_unicast_port_offset : DDS::RtpsWellKnownPorts_t