Period from contents

Establishing which period a file covers from the rows and the pre-header metadata inside it, not from its name or its download date. The contents decide the period. Where a file carries no internal evidence of what it is, that absence is stated on the page rather than assumed away.

Principle 4 · Filenames lie

Where does Period from contents come from?

Principle 4 of the Kymira doctrine, Filenames lie. Period from contents is the name the doctrine gives to what that principle requires in practice.

What failure is Period from contents named after?

The filename that lies about the period. A file called Q2 carrying July rows. Headline the file and the quarter is wrong.

What does it look like on a real file?

The pre-header line stating the period sets the heading; the filename and the download date set nothing.

Not for

Not for files with no internal date evidence. Where the contents say nothing, the page says so rather than inferring a period.

Nearest terms

Filename lieA file named by the system that produced it rather than by what it holds Title lieA cell in a file's pre-header that looks like identity evidence but asserts nothing: an...Stale and correctThe state a certified system prefers when a check fails: last week's numbers, visibly labelled...

Last updated 2026-09-02 · Dylan, founder · one of 40 terms in the Kymira glossary, each one named after something we watched go wrong in a real build or in our own audits.

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