Requires 
The representation of the Requires ReferenceType in the address space is shown in the following table:
| Name | Attribute |
|---|---|
| NodeId | i=25256 |
| NamespaceUri | http://opcfoundation.org/UA/ |
| BrowseName | Requires |
| NodeClass | ReferenceType |
| InverseName | IsRequiredBy |
| Symmetric | False |
| IsAbstract | False |
| SubtypeOf | HierarchicalReferences |
| Categories | Base Info Requires |