[omk]

Excellent posts. Coincidentally couple weeks ago while evaluating a HTTP response for a web service, I noticed that for tabular data, CSV is much more optimal than JSON; yet there is lack of HTTP header support for CSV responses that could provide clients with supplementary information in order to keep parsers adaptable.

If you have a copy of the said RFC, would like to refer.

[gregw2]

Don't know the parent poster's RFC... but there is a RFC 4810 which attempts to define CSV and when I looked was what Excel generated.