TREND_TYPES = (
    (1, 'Trend'),
    (2, 'Megatrend'),
)

UNCERTAINTY_TYPES = (
    (1, 'Rationale'),
    (2, 'Data'),
    (3, 'Methodology (related to the model)'),
)

RELATION_TYPES = (
    (1, 'Cause-effect relationship'),
    (2, 'Neutral relationship'),
)

CANONICAL_ROLES = (
    'Authenticated',
    'Administrator',
    'Contributor',
    'Viewer',
    'Reviewer',
)
