PRESENTATION

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

Data Structures
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 DDS_DataReader. 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 DDS_DataWriter. Scope spans all instances within the same DDS_DataWriter (or DDS_DataReader), but not across instances in different DDS_DataWriter (or DDS_DataReader entities.
DDS_GROUP_PRESENTATION_QOS	Scope spans all instances belonging to DDS_DataWriter (or DDS_DataReader) entities within the same DDS_Publisher (or DDS_Subscriber).
DDS_HIGHEST_OFFERED_PRESENTATION_QOS	This value only applies to a DDS_Subscriber. The DDS_Subscriber will use the access scope specified by each remote DDS_Publisher.