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45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
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// Copyright 2016 Rick Beton. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package period provides functionality for periods of time using ISO-8601 conventions.
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// This deals with years, months, weeks/days, hours, minutes and seconds.
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//
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// Because of the vagaries of calendar systems, the meaning of year lengths, month lengths
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// and even day lengths depends on context. So a period is not necessarily a fixed duration
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// of time in terms of seconds.
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//
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// See https://en.wikipedia.org/wiki/ISO_8601#Durations
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//
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// Example representations:
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//
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// * "P2Y" is two years;
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//
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// * "P6M" is six months;
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//
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// * "P4D" is four days;
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//
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// * "P1W" is one week (seven days);
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//
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// * "PT3H" is three hours.
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//
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// * "PT20M" is twenty minutes.
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//
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// * "PT30S" is thirty seconds.
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//
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// These can be combined, for example:
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//
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// * "P3Y6M4W1D" is three years, 6 months, 4 weeks and one day.
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//
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// * "P2DT12H" is 2 days and 12 hours.
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//
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// Also, decimal fractions are supported to one decimal place. To comply with
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// the standard, only the last non-zero component is allowed to have a fraction.
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// For example
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//
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// * "P2.5Y" is 2.5 years.
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//
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// * "PT12M7.5S" is 12 minutes and 7.5 seconds.
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//
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package period
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