PRESENTATION

Specifies how the samples representing changes to data instances are presented to a subscribing application. More...

Classes
struct	DDS_PresentationQosPolicy
	Specifies how the samples representing changes to data instances are presented to a subscribing application. More...

Enumerations
enum	DDS_PresentationQosPolicyAccessScopeKind { DDS_INSTANCE_PRESENTATION_QOS, DDS_TOPIC_PRESENTATION_QOS, DDS_GROUP_PRESENTATION_QOS, DDS_HIGHEST_OFFERED_PRESENTATION_QOS }
	Kinds of presentation "access scope". More...

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Detailed Description

Specifies how the samples representing changes to data instances are presented to a subscribing application.

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Enumeration Type Documentation

enum DDS_PresentationQosPolicyAccessScopeKind

Kinds of presentation "access scope".

Access scope determines the largest scope spanning the entities for which the order and coherency of changes can be preserved.

QoS:

DDS_PresentationQosPolicy

Enumerator:

DDS_INSTANCE_PRESENTATION_QOS	[default] for DDSDataReader. Scope spans only a single instance. Indicates that changes to one instance need not be coherent nor ordered with respect to changes to any other instance. In other words, order and coherent changes apply to each instance separately.
DDS_TOPIC_PRESENTATION_QOS	[default] for DDSDataWriter. Scope spans all instances within the same DDSDataWriter (or DDSDataReader), but not across instances in different DDSDataWriter (or DDSDataReader entities.
DDS_GROUP_PRESENTATION_QOS	Scope spans all instances belonging to DDSDataWriter (or DDSDataReader) entities within the same DDSPublisher (or DDSSubscriber).
DDS_HIGHEST_OFFERED_PRESENTATION_QOS	This value only applies to a DDSSubscriber. The DDSSubscriber will use the access scope specified by each remote DDSPublisher.