+-------------+ +-------------+ +-------------+ | person_role | | admin_c | | last | +-------------+ 1 +-------------+ N n +-------------+ | pe_ro_id o--------}-+ M | object_id o--------}-+--}-o serial | | is_person | +--}-o pe_ro_id | | | prev_serial | |*nic_hdl | | | object_type | | | object | +-------------+ | | ref_type | | +-------------+ | +-------------+ | | | +----------+ | +-----------+ | | names | | | li_author | | +----------+ m | +-----------+ N | | pe_ro_id o-----------}-+ M | li_id o----------}-+ |*name | +--}-o pe_ro_id | | +----------+ | | ref_type | | | +-----------+ | +----------+ | | | junk | | +-------------+ | +----------+ 1 | | tech_c | | | id o-----------}-+ +-------------+ N | | junk_key | | M | object_id o--------}-+ +----------+ |--}-o pe_ro_id | | | | object_type | | | | ref_type | | | +-------------+ | | | | +-------------+ | | | zone_c | | | +-------------+ N | | M | object_id o--------}-+ +--}-o pe_ro_id | | object_type | | ref_type | +-------------+