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iso8601Specified in ISO 8601 format. For example, P1W equates to one week, P1M equates to one month, P3M equates to three months, P6M equates to six months, and P1Y equates to one year
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unitThe number of period units: day, week, month, year, unknown
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valueThe increment of time that a subscription period is specified in
Contains all the details associated with a Period