[
  'composites' =>
  [
    [
      'anchor' => 'datasource',
      'fields' =>
      [
        [
          'name' => 'name',
          'type' => 'text',
          'temporal' => false
        ]
      ]
    ],
    [
      'anchor' => 'labccd',
      'fields' =>
      [
        [
          'name' => 'officevisit',
          'type' => 'boolean',
          'temporal' => false
        ]
      ]
    ]
  ],
  'junctions' =>
  [
    [
      'name'=>'sourcedmeasures',
      'temporal'=>false,
      'relations'=>
      [
        [
          'role' =>'user',
          'anchor'=>'user',
          'many'=>false,
          'firstRole'=>true,
        ],
        [
          'role' => 'measure',
          'anchor' => 'measure',
          'many' => true,
          'firstRole' => false
        ],
        [
          'role'=>'source',
          'anchor'=>'datasource',
          'many'=>false,
          'firstRole'=>false
        ]
      ]
    ]
  ]
];

[
  'composites' =>
  [
  ],
  'junctions' => [ ]
];