v1.5.2 - 2026-06-10

Fixed ? Custom DataType nodes (ExtensionObjectsBuilder)

• DataTypeDefinition attribute now exposed on TestPointXYZ (ns=3;i=3000) and TestRangeStruct (ns=3;i=3001) ? each DataTypeState carries a StructureDefinition (X/Y/Z and Low/High/Value, all Double scalars, DefaultEncodingId pointing at the respective Default Binary node). Previously reading attribute 23 returned Bad_AttributeIdInvalid, so OPC UA 1.04+ clients could not discover the structure layout. Used by the strengthened discoverDataTypes() integration tests in php-opcua/opcua-client.
• Encoding nodes linked via HasEncoding (i=38) instead of HasComponent ? AddChild produced a non-conformant HasComponent reference, so spec-compliant clients browsing for HasEncoding could not find the Default Binary nodes (ns=3;i=3010 / ns=3;i=3011).