DATE_RANGE
Parse an ISO-8601 time interval between two dates in either basic or extended format.
Examples:
1990-01-04/1991-08-30../1991083019900104/..../..(empty string)
Parse an ISO-8601 time interval between two dates in either basic or extended format.
Examples:
1990-01-04/1991-08-30
../19910830
19900104/..
../..
(empty string)