Folio’s Tony Silber lists the following “six key properties for what a magazine is,” quoting Bob Sacks, a “publishing consultant” at the Independent Magazine Advisory Group’s annual meeting (h/t, Nieman Lab):

1. It’s metered. It’s paginated. It has a beginning, middle and end.
2. It’s edited, or curated.
3. It’s designed.
4. It’s date-stamped.
5. It’s permanent. Once created, it can’t be changed.
6. It’s periodic. It has a calendar or rhythm. It has a series of issues.

“Once created can’t be changed?” Updated? Added to? Commented on?

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Liz Cox Barrett is a writer at CJR.