# Is fractional_seconds_allowed attribute needed in C_DURATION?

**Category:** [ADL](https://discourse.openehr.org/c/adl/40)
**Created:** 2021-12-24 05:43 UTC
**Views:** 646
**Replies:** 0
**URL:** https://discourse.openehr.org/t/is-fractional-seconds-allowed-attribute-needed-in-c-duration/2225

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## Post #1 by @pablo

In the current spec I have found that attribute in https://specifications.openehr.org/releases/AM/Release-2.2.0/AOM1.4.html#_overview_4

By looking at the ISO8601 Wikipedia (hope we can look at the spec soon) there is no fractions for the seconds in a duration. If that is correct, then I don't understand what `fractional_seconds_allowed` is representing.

Any ideas?
Thanks!

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**Canonical:** https://discourse.openehr.org/t/is-fractional-seconds-allowed-attribute-needed-in-c-duration/2225
**Original content:** https://discourse.openehr.org/t/is-fractional-seconds-allowed-attribute-needed-in-c-duration/2225