ER-Diagram of whois (Perl) database

    Object                                  Inverse Attributes
----------------------------------------------------------------------------
    am                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| as-macro          |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| as-macro:    1    oP       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| descr:       1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| as-list:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| guardian:    0..1 |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| tech-c:      1..n oF ---->-|--|--|--|--|--|--|--|--|--|--|--|--|--|--o  |  |   
| admin-c:     1..n oF ---->-o  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      1..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    an                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| aut-num           |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| aut-num:     1    oP       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| as-name:     0..1 |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| descr:       1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| as-in:       0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| as-out:      0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| cross-nfy:   0..n oF ---->-|--|--o  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| cross-mnt:   0..n oF ---->-|--|--|--o  |  |  |  |  |  |  |  |  |  |  |  |  |   
| interas-in:  0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| interas-out: 0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| as-exclude:  0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| default:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| guardian:    0..1 |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| admin-c:     1..n oF ---->-o  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| tech-c:      1..n oF ---->-|--|--|--|--|--|--|--|--|--|--|--|--|--|--o  |  |   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      1..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    cm                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| community         |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| community:   1    oP       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| descr:       1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| authority:   1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| guardian:    0..1 |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| tech-c:      1..n oF ---->-|--|--|--|--|--|--|--|--|--|--|--|--|--|--o  |  |   
| admin-c:     1..n oF ---->-o  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      1..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    dn                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| domain            |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| domain:      1    oP       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| descr:       1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| admin-c:     1..n oF ---->-o  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| tech-c:      1..n oF ---->-|--|--|--|--|--|--|--|--|--|--|--|--|--|--o  |  |   
| zone-c:      1..n oF ---->-|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--o  |   
| nserver:     0..n oU ---->-|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |  |   
| sub-dom:     0..n oU ---->-|--|--|--|--|--|--|--|--|--|--|--|--|--o  |  |  |   
| dom-net:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      0..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| mnt-lower:   ?..? o? ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| refer:       0..1 |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    dp                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| dom-prefix        |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | *1
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| dom-prefix:  1    oP       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| dom-name:    1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| descr:       0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| bis:         0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| dom-in:      0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| dom-out:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| default:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| admin-c:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| tech-c:      1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| guardian:    0..1 |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      0..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    i6                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| inet6num          |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| inet6num:    1    oP       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| netname:     1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| descr:       1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| country:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| admin-c:     1..n oF ---->-o  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| tech-c:      1..n oF ---->-|--|--|--|--|--|--|--|--|--|--|--|--|--|--o  |  |   
| rev-srv:     0..n oU ---->-|--|--|--|--|--|--|--|--|--|--|--|--o  |  |  |  |   
| status:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      0..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| mnt-lower:   0..n oF -     |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    in                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| inetnum           |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| inetnum:     1    oP       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| netname:     1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| descr:       1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| country:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| admin-c:     1..n oF ---->-o  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| tech-c:      1..n oF ---->-|--|--|--|--|--|--|--|--|--|--|--|--|--|--o  |  |   
| rev-srv:     0..n oU ---->-|--|--|--|--|--|--|--|--|--|--|--|--o  |  |  |  |   
| status:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      0..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| mnt-lower:   0..n oF       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    ir                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| inet-rtr          |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| inet-rtr:    1    oP       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| localas:     1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| ifaddr:      1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| peer:        0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| admin-c:     1..n oF ---->-o  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| tech-c:      1..n oF ---->-|--|--|--|--|--|--|--|--|--|--|--|--|--|--o  |  |   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      1..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    kc                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| key-cert          |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| key-cert:    1    oP       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| method:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| owner:       1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| fingerpr:    1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| certif:      1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      1..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    li                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| limerick          |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| limerick:    1    oP       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| descr:       0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| text:        1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| admin-c:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| author:      1..n oF ---->-|--o  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      1..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    mt                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| mntner            |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| mntner:      1    oP ----<-|--|--|--o--|--|--|--o  |  |  |  |  |  |  |  |  |   
| descr:       1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| admin-c:     1..n oF ---->-o  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| tech-c:      0..n oF ---->-|--|--|--|--|--|--|--|--|--|--|--|--|--|--o  |  |   
| upd-to:      1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| mnt-nfy:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| auth:        1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      1..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    pn                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| person            |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| person:      1    oP ~~~~<~.~~.~~|~~|~~|~~|~~|~~|~~|~~|~~|~~|~~|~~|~~|~~.~~. *2
| address:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| phone:       1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| fax-no:      0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| e-mail:      0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| nic-hdl:     1    oP ----<-o--|--o--|--|--|--|--|--|--|--|--|--|--|--o--o   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      0..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    ro                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| role              |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| role:        1    oP ~~~~<~.~~.~~|~~|~~|~~|~~|~~|~~|~~|~~|~~|~~|~~|~~|~~.~~. *2
| address:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| phone:       0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| fax-no:      0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| e-mail:      1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| trouble:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| admin-c:     1..n oF ---->-o  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| tech-c:      1..n oF ---->-|--|--|--|--|--|--|--|--|--|--|--|--|--|--o  |  |   
| nic-hdl:     1    oP ----<-o--|--|--|--|--|--|--|--|--|--|--|--|--|--|--o--o   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      0..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
    rt                       ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| route             |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| route:       1    oP       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| descr:       1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| origin:      1    oP       |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| hole:        0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| withdrawn:   0..1 |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| comm-list:   0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| advisory:    0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| remarks:     0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| cross-nfy:   0..n oF ---->-|--|--o  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| community:   0..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| cross-mnt:   0..n oF ---->-|--|--|--o  |  |  |  |  |  |  |  |  |  |  |  |  |   
| notify:      0..n oU ---->-|--|--|--|--|--|--|--|--|--|--o  |  |  |  |  |  |   
| mnt-by:      1..n oF ---->-|--|--|--|--|--|--|--o  |  |  |  |  |  |  |  |  |   
| changed:     1..n |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
| source:      1    |        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
+-------------------+        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
                             ac ah cn ct dt ex ip mb ml mo ns ny or rz sd tc zc 
Un-constrained foreign keys: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   
       +-------------------<-|--|--|--|--|--|--|--|--|--o--o--|--|--o  |  |  |   
       |                                                                      
     __!__                                                                    
      ---                                                                     
       '                                                                      
                                                                              
+-----------------------------------+
| Legend                            |
+------+----------------------------+
| code | description                |
+------+----------------------------+
| P    | Primary key                |
| F    | Foreign key                |
| U    | Un-constrained foreign key |
+------+----------------------------+


+----------------------+
| Inverse Attributes   |
+------+---------------+
| code | name          |
+------+---------------+
| ac   | admin-c       |
| ah   | author        |
| cn   | cross-nfy     |
| ct   | cross-mnt     |
| dt   | upd-to        |
| ex   | export        |
| ip   | import        |
| mb   | mnt-by        |
| ml   | mnt-lower     |
| mo   | member-of     |
| ns   | nserver       |
| ny   | notify        |
| or   | origin        |
| rz   | rev-srv       |
| sd   | sub-dom       |
| tc   | tech-c        |
| zc   | zone-c        |
+------+---------------+

Notes:
------
*1 : Not migrating dom-prefix object.
*2 : Has name in person and role objects as a primary key been phased out yet?