Returns the value of the specified property for the originating node when using the HasSiblingWith or NumDescendantsWith functions.
OrigPropValue(PropAbbrev: String): String
PropAbbrev is the name of the property to use.
HasSiblingWith(GreaterThan(OrigPropValue(ID),ID())
If the current node's ID is 200 and it has any siblings with a node ID greater than 200, then the return value is True.