Part Naming
A package implementer shall neither create nor recognize a part with a part name derived from another part name by appending segments to it. [M1.11]
example: : If a package contains a part named “/segment1/segment2/.../segmentn”, then other parts in that package shall not have names such as: “/segment1”, “segment1/segment2”, or “/segment1/segment2/.../segmentn-1”.