text: module.exports = {
    period: require('./period'),
    label: require('./label'),
  
    periodCollection: require('./period_collection'),
    periodCollectionSeq: require('./period_collection_seq'),
  
  
    terminus: require('./terminus'),
    terminusSeq: require('./terminus_seq'),
  
    source: require('./source'),
  
    contributor: require('./contributor'),
    contributorSeq: require('./contributor_seq'),
  }
  