work group

1. create work group

1.1. name

1.1.1. eng+ num

1.1.2. Hb+num

1.1.3. simbols

1.1.4. empty

1.1.5. length

1.2. description

1.3. environment

1.4. permissions

2. update work group

2.1. select permissions

2.2. add participants

2.3. delete participants

2.4. add environment

2.5. delete environment