text: import trafaret as t
  
  STORE_LOCATION_SCHEMA = t.Enum('S3', 'gcs', 'azure', 'rackspace', 'dropbox')
  
  
  def validate_upload_tags(d):
      t.List(t.String, max_length=10).check(list(d.keys()))
      t.Mapping(t.String(max_length=128), t.String(max_length=256)).check(d)
      return d
  
  
  STORE_SCHEMA = t.Dict(
      t.Key('filename', optional=True, trafaret=t.String),
      t.Key('mimetype', optional=True, trafaret=t.String),
      t.Key('location', optional=True, trafaret=t.String),
      t.Key('path', optional=True, trafaret=t.String),
      t.Key('container', optional=True, trafaret=t.String),
      t.Key('region', optional=True, trafaret=t.String),
      t.Key('access', optional=True, trafaret=t.String),
      t.Key('base64decode', optional=True, trafaret=t.Bool),
      t.Key('workflows', optional=True, trafaret=t.List(t.String)),
      t.Key('upload_tags', optional=True, trafaret=validate_upload_tags),
  )
  