RelativePathElement – This attribute type is created using the standard mapping rules, except the ReferenceTypeId attribute is of type ExplicitNodeId defined in A.2.3, rather than NodeId. Table A.4 indicates the default value to use if the indicated attribute is missing.

Table A.4 – Default Values for RelativePathElement

attribute	Default value used if attribute is missing
ReferenceTypeId	nsu=http://opcfoundation.org/UA/;i=22 (i.e. HierarchicalReferences)
IsInverse	FALSE
IncludeSubtypes	TRUE