Discovery Metadata

These QoS are sent as part of one of the built-in discovery topics.

These QoS are sent as part of one of the built-in discovery topics.

See also

DDS_ParticipantBuiltinTopicData

DDS_PublicationBuiltinTopicData

DDS_SubscriptionBuiltinTopicData

DDS_UserDataQosPolicy	value
	<<spec>> a sequence of octets
DDS_GroupDataQosPolicy	value
	<<spec>> a sequence of octets
DDS_DurabilityQosPolicy	kind
	<<basic>> <<spec>> The kind of durability.
DDS_DurabilityQosPolicy	direct_communication
	<<extension>> Indicates whether or not a TRANSIENT or PERSISTENT DDS_DataReader should receive samples directly from a TRANSIENT or PERSISTENT DDS_DataWriter
DDS_DurabilityServiceQosPolicy	service_cleanup_delay
	<<spec>> Controls when the service is able to remove all information regarding a data instances.
DDS_DurabilityServiceQosPolicy	history_kind
	<<spec>> The kind of history to apply in recouping durable data.
DDS_DurabilityServiceQosPolicy	history_depth
	<<spec>> Setting to use for the DDS_DurabilityQosPolicy::writer_depth when recouping durable data.
DDS_DurabilityServiceQosPolicy	max_samples
	<<spec>> Part of resource limits QoS policy to apply when feeding a late joiner.
DDS_DurabilityServiceQosPolicy	max_instances
	<<spec>> Part of resource limits QoS policy to apply when feeding a late joiner.
DDS_DurabilityServiceQosPolicy	max_samples_per_instance
	<<spec>> Part of resource limits QoS policy to apply when feeding a late joiner.
DDS_CompressionSettings_t	compression_ids
	<<extension>> Mask that represents the compression algorithms enabled.
DDS_DataRepresentationQosPolicy	value
	<<spec>> Sequence of representation identifiers.
DDS_DataRepresentationQosPolicy	compression_settings
	<<basic>> <<extension>> Structure that contains the compression settings.
DDS_PresentationQosPolicy	access_scope
	<<spec>> Determines the largest scope spanning the entities for which the order and coherency of changes can be preserved.
DDS_PresentationQosPolicy	coherent_access
	<<spec>> Specifies support for coherent access. Controls whether coherent access is supported within the scope access_scope.
DDS_PresentationQosPolicy	ordered_access
	<<spec>> Specifies support for ordered access to the samples received at the subscription end. Controls whether ordered access is supported within the scope access_scope.
DDS_DeadlineQosPolicy	period
	<<basic>> <<spec>> Duration of the deadline period.
DDS_LatencyBudgetQosPolicy	duration
	<<spec>> Duration of the maximum acceptable delay.
DDS_OwnershipQosPolicy	kind
	<<basic>> <<spec>> The kind of ownership
DDS_OwnershipStrengthQosPolicy	value
	<<basic>> <<spec>> The strength value used to arbitrate among multiple writers.
DDS_LivelinessQosPolicy	kind
	<<basic>> <<spec>> The kind of liveliness desired.
DDS_LivelinessQosPolicy	lease_duration
	<<basic>> <<spec>> The duration within which a DDS_DataWriter must be asserted, or else it is assumed to be not alive.
DDS_TimeBasedFilterQosPolicy	minimum_separation
	<<basic>> <<spec>> The minimum separation duration between subsequent samples.
DDS_PartitionQosPolicy	name
	<<basic>> <<spec>> A list of partition names
DDS_ReliabilityQosPolicy	kind
	<<basic>> <<spec>> Kind of reliability.
DDS_ReliabilityQosPolicy	max_blocking_time
	<<basic>> <<spec>> The maximum time a DataWriter can block on a write() call.
DDS_ReliabilityQosPolicy	acknowledgment_kind
	<<extension>> Kind of reliable acknowledgment
DDS_ReliabilityQosPolicy	instance_state_consistency_kind
	<<extension>> Whether instance state consistency is enabled
DDS_DestinationOrderQosPolicy	kind
	<<basic>> <<spec>> Specifies the desired kind of destination order.
DDS_LifespanQosPolicy	duration
	<<basic>> <<spec>> Maximum duration for the data's validity.
DDS_TypeConsistencyEnforcementQosPolicy	kind
	<<spec>> Type consistency kind.
DDS_TypeConsistencyEnforcementQosPolicy	ignore_sequence_bounds
	<<spec>> Controls whether sequence bounds are taken into consideration for type assignability.
DDS_TypeConsistencyEnforcementQosPolicy	ignore_string_bounds
	<<spec>> Controls whether string bounds are taken into consideration for type assignability.
DDS_TypeConsistencyEnforcementQosPolicy	ignore_member_names
	<<spec>> Controls whether member names are taken into consideration for type assignability.
DDS_TypeConsistencyEnforcementQosPolicy	prevent_type_widening
	<<spec>> Controls whether type widening is allowed.
DDS_TypeConsistencyEnforcementQosPolicy	force_type_validation
	<<spec>> Controls whether type information must be available in order to complete matching between a DDS_DataWriter and a DDS_DataReader.
DDS_TypeConsistencyEnforcementQosPolicy	ignore_enum_literal_names
	<<spec>> Controls whether enumeration constant names are taken into consideration for type assignability.
DDS_TransportUnicastQosPolicy	value
	<<extension>> A sequence of unicast communication settings.
DDS_TransportMulticastQosPolicy	value
	<<basic>> <<extension>> A sequence of multicast communications settings.
DDS_DiscoveryQosPolicy	multicast_receive_addresses
	<<basic>> <<extension>> Specifies the multicast group addresses on which discovery-related meta-traffic can be received by the DomainParticipant.
DDS_DataReaderProtocolQosPolicy	virtual_guid
	<<extension>> The virtual GUID (Global Unique Identifier).
DDS_DataReaderProtocolQosPolicy	expects_inline_qos
	[DEPRECATED] <<extension>> Specifies whether this DataReader expects inline QoS with every sample.
DDS_DataReaderProtocolQosPolicy	disable_positive_acks
	<<extension>> Whether the reader sends positive acknowledgements to writers.
DDS_DataWriterProtocolQosPolicy	virtual_guid
	<<extension>> The virtual GUID (Global Unique Identifier).
DDS_DataWriterProtocolQosPolicy	disable_positive_acks
	<<extension>> Controls whether or not the writer expects positive acknowledgements from matching readers.
DDS_DiscoveryConfigQosPolicy	participant_liveliness_lease_duration
	<<basic>> <<extension>> The liveliness lease duration for the participant.
DDS_PropertyQosPolicy	value
	<<basic>> <<extension>> Sequence of properties.
DDS_DataTags	tags
	<<spec>> Sequence of data tags.
DDS_EntityNameQosPolicy	name
	<<basic>> <<extension>> The name of the entity.
DDS_EntityNameQosPolicy	role_name
	<<extension>> The entity role name.
DDS_ServiceQosPolicy	kind
	<<extension>> The kind of service.
DDS_MultiChannelQosPolicy	channels
	<<extension>> A sequence of DDS_ChannelSettings_t used to configure the channels' properties. If the length of the sequence is zero, the QoS policy will be ignored.
DDS_MultiChannelQosPolicy	filter_name
	<<extension>> Name of the filter class used to describe the filter expressions of a MultiChannel DataWriter.
DDS_TopicQueryDispatchQosPolicy	enable
	<<extension>> Allows this writer to dispatch TopicQueries