def information_classes():
    """Return the set of available "information classes" for datasets.

    On the Salford site each dataset can belong to an information class
    (custom dataset field).

    This function is used to fill in the options for the Information Class
    dropdown in the dataset form, and in other places where a list of all the
    information classes is needed.

    """
    return ['Who we are and what we do',
        'What we spend and how we spend it',
        'What our priorities are and how we are doing',
        'How we make decisions', 'Our policies and procedures',
        'Lists and registers', 'Services provided by the council']
