HasDictionaryEntry is used to define the relationship to a Syntax Reference by referencing from quantity or unit Nodes to an instance of a SyntaxReferenceEntryType. Each quantity or unit instance can have zero, one or more such references.
Instances of SyntaxReferenceEntryType have a well-defined NodeId as defined in Table 34.
Table 34 – Definition of NodeId for instances of the SyntaxReferenceEntryType
|
Name |
Type |
Definition for instances of the SyntaxReferenceEntryType |
|
NodeId |
structure |
|
|
namespaceIndex |
UInt16 |
The NamespaceTable index for the Syntax Reference URI (see Table 33). |
|
IdType |
Enum |
String |
|
identifier |
* |
The Syntax Reference identifier (SyntaxReferenceId), see 6.3.3 |
When calling the Browse Service for a Quantity or Unit Node, the response includes the HasDictionaryEntry Reference together with the well-defined NodeId for the SyntaxReferenceEntryType instance. The actual instance therefore is not required in the AddressSpace.
Figure 7 provides an example of References to external works.
