The nt:versionedChild node type has the following definition (repeated from 6.7.22.17 nt:frozenNode):
NodeTypeName
nt:versionedChild
Supertypes
nt:base
IsMixin
false
HasOrderableChildNodes
false
PrimaryItemName
null
PropertyDefinition
Name jcr:childVersionHistory
RequiredType REFERENCE
ValueConstraints ["nt:versionHistory"]
DefaultValues null
AutoCreated true
Mandatory true
OnParentVersion ABORT
Protected true
Multiple false