B.3.9 Example 6

The sixth example provides an illustration a different type of request, one in which the Client is interested in displaying part of the AddressSpace of the Server. This request includes listing a Reference as something that is to be returned.

Example 6: Get PersonType.NodeId, AnimalType.NodeId, PersonType.HasChild Reference, PersonType.HasAnimal Reference where a person has a child who has a Animal.

Table B.25 describes the NodeTypeDescription parameters used in the example.

The corresponding ContentFilter is illustrated in Figure B.10.

Table B.26 describes the elements, operators and operands used in the example.

The results from this query would contain the QueryDataSets shown in Table B.27.

Table B.28 provides an example of the same QueryDataSet as shown in Table B.27 without any additional fields and minimal symbolic Ids. There is an entry for each requested Attribute, in the cases where an Attribute would return multiple entries the entries are separated by comas. If a structure is being returned then the structure is enclosed in square brackets. In the case of a ReferenceDescription the structure contains a structure and DisplayName and BrowseName are assumed to be the same and defined in Figure B.4.

The PersonType, HasChild, PigType, HasPet, HasFarmAnimal identifiers used in the above table would be translated to actual ExpandedNodeId.