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7 result(s) for Field

• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  8.6 Argument
  even if they have array-like semantics like ByteString and String. ArrayDimensions UInt32[] This field specifies the maximum supported length of each dimension. If the maximum is unknown the value ... number of elements shall be equal to the value of the v alueRank field . This field shall be null if v alueRank ≤ 0. The maximum number of elements
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  8.51 StructureField
  StructureField This Structured DataType is used to provide the metadata for a field of a custom Structure DataType . The StructureField is formally defined in Table 36 . Table 36 - StructureField Structure ... Name Type Description StructureField Structure Name String A name for the field that is unique within the StructureDefinition . The name is restricted to 512 characters and shall not contain Unicode
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  8.58 AccessLevelExType
  systems, in particular hard-realtime controllers, which can not ensure atomicity. The NoSubDataTypes Field represents the ability of a Variable to accept derived DataTypes . In general Variables are expected ... allow the defined DataType or any subtype of that DataType . This Field is used to indicate a Variable restricts the DataType to only what is defined, that is no subtypes
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  7.22.3 EventFilter
  criteria specified by the whereClause . A null value is returned in the corresponding event field in the Publish response if the selected field is not part of the Event ... error was returned in the selectClauseResults of the EventFilterResult . If the selected field is supported but not available at the time of the event notification, the event field shall contain
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  C.2.5 StructuredType
  sequence of binary-encoded values. Each value in the sequence is called a Field . Each Field references a TypeDescription that describes the binary-encoded value that appears in the field ... Field may specify that zero, one or multiple instances of the type appear within the sequence described by the StructuredType . Authors of type dictionaries should use StructuredTypes to describe
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  C.2.6 FieldType
  StructuredType . Every FieldType shall reference a TypeDescription that describes the encoded value for the field. A FieldType may specify an array of encoded values. Fields may be optional and they ... Documentation Documentation An element that contains human readable text and XML that describes the field. This element should capture any semantic information that would help a human to understand what
• OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub
  6.2.3.2.4 FieldMetaData
  FieldMetaData This Structure DataType is used to provide the metadata for a field in a DataSet . The FieldMetaData is formally defined in Table 7 . Table 7 - FieldMetaData structure Name Type ... Description FieldMetaData Structure Name String Name of the field. The name shall be unique in the DataSet . Description LocalizedText Description of the field. The default value shall be a null