date-range - 日期期间将“2000 年之前”理解为 [“2000-01-01/2000-12-31”]

Question

我正在构建一个api.ai代理，但我很难date-period正确理解无界参数。

例如：

• before 2000被解释为["2000-01-01/2000-12-31"]
• after 1999被解释为["1999-01-01/1999-12-31"]
• after January 2007被解释为["2007-01-01/2007-01-31"]

这让我认为只有日期（2000/ January 2007）用于计算日期范围，忽略副词（before/ after）。

有没有办法理解before 2000为["0000-01-01/2000-01-01"]（或者至少["1970-01-01/2000-12-31"]是基于 Epoch 的）？

Answer 1

The before and after isn't matched, you are right.

You can add a custom entity, like temporal preposition, to deal with this.

before: prior to, previous to, earlier than, preparatory to, in preparation for, preliminary to, in anticipation of, in expectation of; in advance of, ahead of, leading up to

after: following, subsequent to, succeeding, at the close/end of, in the wake of, later than

You may create a composite entity (see in the docs). There you can compose the new preposition entity with the sys.date entity. So you will bound them together logically.