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Make seconds optional in times #696

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Make seconds optional in times #696

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c0411c6
Make partial-time seconds optional
eksortso Jan 30, 2020
a50f32d
Describe optional seconds in time types
eksortso Jan 30, 2020
100a884
Update README.md: fix grammar
eksortso Feb 5, 2020
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23 changes: 23 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -562,6 +562,15 @@ time with a space (as permitted by RFC 3339 section 5.6).
odt4 = 1979-05-27 07:32:00Z
```

One exception to RFC 3339 is permitted: seconds may be omitted if the instant
occurs at a zero-second mark. In such a case, the offset immediately follows
the minutes.

```toml
odt5 = 1979-05-27 07:32Z
odt6 = 1979-05-27 07:32-07:00
```

The precision of fractional seconds is implementation specific, but at least
millisecond precision is expected. If the value contains greater precision than
the implementation can support, the additional precision must be truncated, not
Expand All @@ -581,6 +590,13 @@ ldt1 = 1979-05-27T07:32:00
ldt2 = 1979-05-27T00:32:00.999999
```

Seconds may be omitted if the local instant is at a zero-second mark. In such a
case, the colon and digits following the minutes are removed.

```toml
ldt3 = 1979-05-27T07:32
```

The precision of fractional seconds is implementation specific, but at least
millisecond precision is expected. If the value contains greater precision than
the implementation can support, the additional precision must be truncated, not
Expand Down Expand Up @@ -610,6 +626,13 @@ lt1 = 07:32:00
lt2 = 00:32:00.999999
```

Seconds may be omitted if the local time is at a zero-second mark. In such a
case, the colon and digits following the minutes are removed.

```toml
lt3 = 07:32
```

The precision of fractional seconds is implementation specific, but at least
millisecond precision is expected. If the value contains greater precision than
the implementation can support, the additional precision must be truncated, not
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2 changes: 1 addition & 1 deletion toml.abnf
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Expand Up @@ -169,7 +169,7 @@ time-secfrac = "." 1*DIGIT
time-numoffset = ( "+" / "-" ) time-hour ":" time-minute
time-offset = "Z" / time-numoffset

partial-time = time-hour ":" time-minute ":" time-second [ time-secfrac ]
partial-time = time-hour ":" time-minute [ ":" time-second [ time-secfrac ] ]
full-date = date-fullyear "-" date-month "-" date-mday
full-time = partial-time time-offset

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