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19 result(s) for Topic
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub5.3.8 TopicsTopics A Topic is a string associated with a NetworkMessage that can be used to logically organize NetworkMessages published to a Message Oriented Middleware . Topics are most commonly used with ... filtering is done by the Subscriber . Topics have a hierarchical structure with different Topic levels separated by a delimiter like '/'. For example: opcua/json/status/FlowController1 Mappings to different implementation technologies
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub5.4.3 Actionsrequest and response messages for JSON message mapping are defined in 7.2.5.6 . The MQTT Topic levels for Action messages are defined
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub6.4.1.3.8 TopicTopic The Topic parameter with DataType String contains the unique name of the data stream produced by the WriterGroup within a Message Oriented Middleware . A unique default name
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub6.4.1.6.4 TopicTopic The Topic parameter with DataType String contains the unique name of the data stream from the Publisher that contains the DataSetMessages of interest for the DataSetReader . The Topic
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.2.2 MessageTypesaddressing schema for queues or topics to provide discovery messages to Subscribers . Such a Topic tree is defined for the MQTT transport protocol mapping in 7.3.4.7 . The mapping of MessageTypes
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.3.4.7.1 GeneralTopics are most useful when they follow a predictable pattern. This clause defines the Topic conventions for use with the MQTT mapping. All Publishers shall be able to support these ... conventions. A Topic has the following general pattern: <Prefix>/<Encoding>/<MqttMessageType>/<PublisherId>/[<WriterGroup>[/<DataSetWriter>]] Where Topic levels
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.3.4.7.2 MessageType mappingMessageType mapping <MqttMessageType> Topic levels exist for each MessageType defined in 7.2.2 . Additional information like requirements for RETAIN for each Topic level is provided in Table ... handling of RETAIN messages is defined in 7.3.4.8 . The requirements for topic access permissions are defined in Table 205 . Table 204 - MQTT Topic level MessageType mapping MessageType MqttMessageType RETAIN Required
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.3.4.7.3 data Topic leveldata Topic level The data Topic has the form: <Prefix>/<Encoding>/data/<PublisherId>/<WriterGroup>[/<DataSetWriter>] The <PublisherId> Topic ... level is the PublisherId for the application sending the messages. The <WriterGroup> Topic level is the name of a WriterGroup within the Publisher . The <DataSetWriter> Topic
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.3.4.7.4 metadata Topic levelmetadata Topic level The metadata Topic has the form: <Prefix>/<Encoding>/metadata/<PublisherId>/<WriterGroup>/<DataSetWriter> The <PublisherId> Topic ... level is the PublisherId for the application sending the messages. The <WriterGroup> Topic level is the name of a WriterGroup within the Publisher. The <DataSetWriter> Topic
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.3.4.7.5 application Topic levelapplication Topic level The application Topic has the form: <Prefix>/<Encoding>/application/<PublisherId> The <PublisherId> Topic level is the PublisherId
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.3.4.7.6 endpoints Topic levelendpoints Topic level The endpoints Topic has the form: <Prefix>/<Encoding>/endpoints/<PublisherId> The <PublisherId> Topic level is the PublisherId
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.3.4.7.7 status Topic levelstatus Topic level The status Topic has the form: <Prefix>/<Encoding>/status/<PublisherId> The <PublisherId> Topic level is the PublisherId
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.3.4.7.8 connection Topic levelconnection Topic level The connection Topic has the form: <Prefix>/<Encoding>/connection/<PublisherId> The <PublisherId> Topic level is the PublisherId
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.3.4.7.9 action-request Topic levelaction-request Topic level The action-request Topic has the form: <Prefix>/<Encoding>/action-request/<Responder>/<WriterGroup> The <Responder> Topic level ... PublisherId for the Responder of the Actions . The <WriterGroup> Topic level is the name of a WriterGroup . The action-request Topic level is the default if the system
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.3.4.7.10 action-response Topic levelaction-response Topic level The action-response Topic has the form: <Prefix>/<Encoding>/action-response/<Responder>/<WriterGroup> The <Responder> Topic level ... PublisherId for the Responder of the Actions . The <WriterGroup> Topic level is the name of a WriterGroup . The action-response Topic level is the default if the ResponseAddress
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.3.4.7.11 action-responder Topic levelaction-responder Topic level The action-responder Topic has the form: <Prefix>/<Encoding>/action-responder/<Responder> The <Responder> Topic level is the PublisherId ... String, it should be as short as possible since long Topic names degrade performance. The messages are instances of the PubSubConnection MessageType
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub7.3.4.7.12 action-metadata Topic levelaction-metadata Topic level The action-metadata Topic has the form: <Prefix>/<Encoding>/action-metadata/<Responder>/<WriterGroup>/<DataSetWriter> The <Responder ... Topic level is the PublisherId for the Responder of the Action . The <Group> Topic level is the name of a WriterGroup. The <Writer> Topic level
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub9.3.1.2 DatagramWriterGroupTransportTypeHasProperty Variable DatagramQos TransmitQosDataType[] PropertyType Optional HasProperty Variable DiscoveryAnnounceRate UInt32 PropertyType Optional HasProperty Variable Topic String PropertyType Optional Conformance Units PubSub Model Datagram The MessageRepeatCount is defined ... DatagramQos is defined in 6.4.1.3.6 . The DiscoveryAnnounceRate is defined in 6.4.1.3.7 The Topic is defined
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OPC-10000-14 – OPC Unified Architecture - Part 14: PubSubHasProperty Variable QosCategory String PropertyType Optional HasProperty Variable DatagramQos ReceiveQosDataType[] PropertyType Optional HasProperty Variable Topic String PropertyType Optional Conformance Units PubSub Model Datagram The Address is defined ... String . The QosCategory is defined in 6.4.1.6.2 . The DatagramQos is defined in 6.4.1.6.3 . The Topic is defined