### [*navigation arbre]

%if;has_parents;

%if;(max_anc_level>2)
%if;father.has_parents;
%else;
%end;
%if;mother.has_parents;
%else;
%end;
%nn; %apply;short_display_person("father.father") |  | %nn; %apply;short_display_person("father.mother") |  |  | %nn; %apply;short_display_person("mother.father") |  | %nn; %apply;short_display_person("mother.mother") |
%if;father.has_parents;
%end;
%if;mother.has_parents;
%end;
%if;father.has_parents;

%end;

%if;mother.has_parents;

%end;
%if;father.has_parents;
%end;
%if;mother.has_parents;
%end;
%end;
| %nn; %apply;short_display_person("father") |  |  |  | %nn; %apply;short_display_person("mother") |

| %nn; %apply;short_display_person("self") |

%end;