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11 result(s) for Query

• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.12.1 Overview
  shall be a component of an Object . Discovery is provided through the Browse and Query Services . Clients discover the Methods supported by a Server by browsing for the owning Objects
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.3.1 Description
  RegisterNodes and UnregisterNodes ), Attribute Service Set , Method Service Set , NodeManagement Service Set and Query Service Set . If Session -less Service invocation is supported by a Server , all Services belonging
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  7.44 ViewDescription
  Type Description ViewDescription structure Specifies a View. viewId NodeId NodeId of the View to Query . A null value indicates the entire AddressSpace. timestamp UtcTime The time date desired. The corresponding
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.2.1 Overview
  B.2.1 Overview This deprecated Service Set is used to issue a Query to a Server . OPC UA Query is generic in that it provides an underlying storage mechanism independent Query ... wide variety of OPC UA data stores and information management systems. OPC UA Query permits a Client to access data maintained by a Server without any knowledge of the logical
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.2.2 Querying Views
  description of the organization of Views in the AddressSpace . For any existing View , a Query may be used to return a subset of data from the View . When an application ... issues a Query against a View , only data defined by the View is returned. Data not included in the View but included in the original AddressSpace is not returned
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.2.3 QueryFirst
  B.2.3 QueryFirst This Service is used to issue a Query request to the Server . The complexity of the Query can range from very simple to highly sophisticated. The Query ... TypeDefinitionNode subject to restrictions specified by the filter. On the other hand, the Query can request data from instances of related Node types by specifying a RelativePath from an originating
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.2.4 QueryNext
  Server . If the Client does not want to get the next set of Query information, QueryNext should be called with this parameter set to TRUE. If the parameter
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.3.6 Example 3
  B.3.6 Example 3 The third example provides a more complex Query in which the results are filtered on multiple criteria. Example 3: Get PersonType.LastName, AnimalType.Name, ScheduleType.Period where a person ... LiteralOperand = 10 AttributeOperand = NodeId: Int32, BrowsePath ".", Attribute: NodeId The results from this query would contain the QueryDataSets shown in Table B.18 . Table B.18 - Example 3 QueryDataSets NodeId TypeDefinition
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.3.10 Example 7
  returned. In this case the Person Browsed to Area2 and wanted to Query for information below this starting point. Example 7: Get PersonType.NodeId, AnimalType.NodeId, PersonType.HasChild Reference, PersonType.HasAnimal Reference where ... AttributeOperand = NodeId: BaseObjectType, BrowsePath ".", Attribute: NodeId, LiteralOperand = '95 The results from this Query would contain the QueryDataSets shown in Table B.31 . Table B.31 - Example 7 QueryDataSets NodeId TypeDefinition
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.3.12 Example 9
  NodeId: 12:HasSchedule, BrowsePath ".", Attribute: NodeId LiteralOperand = '1' The results from this Query would contain the QueryDataSets shown in Table B.37 . If this is compared to the result
• OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access
  7.1 General
  services needed for the purpose of DataAccess are: The View service set and Query service set to detect DataItems , and their Properties . The Attribute service set to read or write