Explaining Open Standards email attachements

[Matthias Kirschner]

* Sam Liddicott <sam at liddicott.com> [2010-04-05 17:55:40 +0100]:

> Widespread standards IS interoperability. Open standards merely
> potentially supports interoperability - as the standard becomes
> widespread. There are enough proprietary widespread standards, or
> you wouldn't have had to write your document in the first place, I
> think?

Do you have five examples of widespread _standards_ which are not Open
Standards?

Best wishes,
Matthias

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