On Fri, Jun 15, 2018 at 12:25 PM, Philippe Ombredanne <pombreda...@nexb.com>
wrote:

> Alexios:
> good catch, though even printable may be too generous. A colon is
> printable and not a supported in a Windows file name for instance.
>
> Jilayne:
> We could/should more simply list the allowed characters and be very
> specific.
> Here is my suggestion:
>
> Allowed characters are ASCII:
> - Lower and upper case letters from A to Z.
> - Numbers from 0 to 9
> - Dash '-', underscore '_',  period '.' and plus '+'
>

need to be a little careful here Philippe...

"+" is reserved for license expressions.

Best to stick with what's in Appendix IV of the spec today

idstring              = 1*(ALPHA / DIGIT / "-" / "." )
where ALPHA and DIGIT are per definition in
https://tools.ietf.org/html/rfc5234

 ALPHA          =  %x41-5A / %x61-7A   ; A-Z / a-z

 DIGIT          =  %x30-39             ; 0-9



If you want to see "_" added, then probably should open an issue
against the spec for 2.2 and get it consistent tthroughout.

Thanks, Kate

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