old_contents: NODE_SUBSCRIPTIONS_AVAILABLE = {
      'comments': 'Comments added',
      'file_updated': 'Files updated'
  }
  
  # Note: if the subscription starts with 'global_', it will be treated like a default
  # subscription. If no notification type has been assigned, the user subscription
  # will default to 'email_transactional'.
  USER_SUBSCRIPTIONS_AVAILABLE = {
      'global_comment_replies': 'Replies to your comments',
      'global_comments': 'Comments added',
      'global_file_updated': 'Files updated',
      'global_mentions': 'Mentions added'
  }
  
  # Note: the python value None mean inherit from parent
  NOTIFICATION_TYPES = {
      'email_transactional': 'Email when a change occurs',
      'email_digest': 'Daily email digest of all changes to this project',
      'none': 'None'
  }
  
  # Formatted file provider names for notification emails
  PROVIDERS = {
      'osfstorage': 'OSF Storage',
      'box': 'Box',
      'dataverse': 'Dataverse',
      'dropbox': 'Dropbox',
      'figshare': 'figshare',
      'github': 'GitHub',
      'googledrive': 'Google Drive',
      's3': 'Amazon S3'
  }
  
new_contents: NODE_SUBSCRIPTIONS_AVAILABLE = {
      'comments': 'Comments added',
      'file_updated': 'Files updated'
  }
  
  # Note: if the subscription starts with 'global_', it will be treated like a default
  # subscription. If no notification type has been assigned, the user subscription
  # will default to 'email_transactional'.
  USER_SUBSCRIPTIONS_AVAILABLE = {
      'global_comment_replies': 'Replies to your comments',
      'global_comments': 'Comments added',
      'global_file_updated': 'Files updated',
      'global_mentions': 'Mentions added'
  }
  
  # Note: the python value None mean inherit from parent
  NOTIFICATION_TYPES = {
      'email_transactional': 'Email when a change occurs',
      'email_digest': 'Daily email digest of all changes to this project',
      'none': 'None'
  }
  
  # Formatted file provider names for notification emails
  PROVIDERS = {
      'osfstorage': 'OSF Storage',
      'box': 'Box',
      'dataverse': 'Dataverse',
      'dropbox': 'Dropbox',
      'figshare': 'figshare',
      'github': 'GitHub',
      'googledrive': 'Google Drive',
      'owncloud': 'ownCloud',
      's3': 'Amazon S3'
  }
  
subject: Add owncloud to list of providers in constants.py Fixes commenting issue