Timestamp format - Why are seconds required?

Hello Yaml-Core

While using YAML in an application I am writing, I noticed that YAML
requires a timestamp of the form "2012-10-25 01:41:00" to include the
seconds in the string, instead of allowing timestamps like "2012-10-25
01:41". The ISO8601 format does not require that the seconds be
included, and this is confusing for users many users. It does not
appear to me to be hard to make systems that accept time stamps in
both forms, and it is different from the ISO8601 standard.

So I am curious: why is this confusing requirement in place?

--Mike Cooper

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