The performance form: in this form you can create, modify and delete a performance.
The show performances form: in this form you can show the performances setting a lot of filters.
The modify performance form: in this form you can set the filters to find a performance to modify.
The modify performer: in this form you can set the filters to find a performer to modify.
The show performter form: in this form you can create the performer index filtering the performer table by country, geographical region, performance limits, etc.
