Client Side People Picker schema

In generating CS People Pickers we have been using the same schema options with varying values. Are these the *only* schema options available? Every Google hit I've reviewed has just these.

    schema['PrincipalAccountType'] = 'User,DL,SecGroup,SPGroup';
    schema['SearchPrincipalSource'] = 15;
    schema['ResolvePrincipalSource'] = 15;
    schema['AllowMultipleValues'] = true;
    schema['MaximumEntitySuggestions'] = 50;
    schema['Width'] = '280px';

- Thank you. Respectfully, Janette M. Ricker