text: var metric
    , imperial;
  
  metric = {
    ppm: {
      name: {
        singular: 'Part-per Million'
        , plural: 'Parts-per Million'
      }
      , to_anchor: 1
    }
    , ppb: {
      name: {
        singular: 'Part-per Billion'
        , plural: 'Parts-per Billion'
      }
      , to_anchor: .001
    }
    , ppt: {
      name: {
        singular: 'Part-per Trillion'
        , plural: 'Parts-per Trillion'
      }
      , to_anchor: .000001
    }
    , ppq: {
      name: {
        singular: 'Part-per Quadrillion'
        , plural: 'Parts-per Quadrillion'
      }
      , to_anchor: .000000001
    }
  };
  
  module.exports = {
    metric: metric
    , imperial: {}
    , _anchors: {
      metric: {
        unit: 'ppm'
        , ratio: .000001
      }
    }
  };
  