Markup Linked Item structure.
The m_bMarkupShowControl and m_bMarkupDeleteControl members apply only to linked items in markups (A3DMkpMarkupData). Similarly, the m_bLeaderShowControl and m_bLeaderDeleteControl members apply only to linked items in leaders (A3DMkpLeaderData).
Show/hide markup follows pointed entity.
Delete markup follows pointed entity.
Show leader follows pointed entity.
Delete leader follows pointed entity.
If non-null, this member references a remote product occurrence that contains the reference.
Pointer on the referenced entity. Only A3DRiRepresentationItem, A3DAsmProductOccurrence, A3DMiscReferenceOnTopology and A3DMkpMarkup are accepted