EDTF and Date Representation

CSL Development
13

I played a bit with node and edtf, which shows (per @njbart’s tests) the model has a Date object, and an Interval object, whose “values” property is an array of Date objects.

> edtf.parse('2004-02-01')
{ type: 'Date', level: 0, values: [ 2004, 1, 1 ] }
> edtf.parse('2004-02-01?')
{ type: 'Date', level: 1, values: [ 2004, 1, 1 ], uncertain: true }
> edtf.parse('2004-02-01/2005-02-08')
{
  values: [
    { type: 'Date', level: 0, values: [Array] },
    { type: 'Date', level: 0, values: [Array] }
  ],
  type: 'Interval',
  level: 0
}
> edtf.parse('2004-02-01?/2005-02-08')
{
  values: [
    { type: 'Date', level: 1, values: [Array], uncertain: true },
    { type: 'Date', level: 0, values: [Array] }
  ],
  type: 'Interval',
  level: 1
}
> edtf.parse('../2005-02-08')
{
  values: [ Infinity, { type: 'Date', level: 0, values: [Array] } ],
  type: 'Interval',
  level: 1
}