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External Data Source

Source

Regular Expression
^[-]?P(?!$)(?:(?<year>\d+)+Y)?(?:(?<month>\d+)+M)?(?:(?<days>\d+)+D)?(?:T(?!$)(?:(?<hours>\d+)+H)?(?:(?<minutes>\d+)+M)? (?:(?<seconds>\d+(?:\.\d+)?)+S)?)?$