The following tables list the members exposed by ItemValue.
Public Constructors
| Name | Description | |
|---|---|---|
 | ItemValue Constructor |
Public Properties
| Name | Description | |
|---|---|---|
 | ClientItemHandle | A string that can be passed by the client and be returned along with the data. If the Client includes the ClientItemHandle attribute, then Server must return it to the Client. |
| DiagnosticInfo | Verbose server specific diagnostic information that provides additional information relative to errors. If the client requests this information, and if there is an ItemValue structure being returned, then the server is required to return item specific diagnostic information or a blank string if diagnostic information is not available. |
| ItemName | Identifier of the Data. It is free format (as in the OPC COM server). Required attribute. |
| ItemPath | A portion of the namespace pointing to the data. The ItemPath is server specific and the client should not make any implications about its content, structure, or consistency across servers. ItemPath may or may not imply node, or server. If an XML-DA server was front ending a DA based server, then an example could be: \\NODE\OPC.DAServer.2. ItemPath is a hierarchical parameter. If ItemPath is Blank or missing at all levels of the hierarchy, then the ItemName is expected to be a fully qualified name. |
| Quality | Equivalent to the data contained within the DA Quality Word. |
| ResultID | If an error or a non-critical exception (minor problem) occurred this ID will contain a qualified name of an OPCError. If the server also returns verbose error messages the associated OPCError element will be located elsewhere in the message. This allows multiple instances of an Error ID to map to the same verbose OPC Error. |
| Timestamp | As in OPC COM, the Timestamp is the most accurate time the server is able to associate with a value. The Timestamp should indicate the time that the value and quality was obtained by the device (if this is available) |
| TimestampSpecified | If FALSe then the TimeStamp value is not defiend or ignored. |
| Value | A value with its type specified with the XML Schema ??type?? attribute. The type may be any of the simple or array types defined in OPC Specification Section 2.7. |
| ValueTypeQualifier | A ValueTypeQualifier attribute is included when values of type time, date, and duration are transmitted between client and server. The ValueTypeQualifier attribute uniquely identifies the intended value type of the value versus the type as transmitted across the wire. For all values of types other than time, date and duration, this attribute will be missing or if not missing, then ignored. |