Re: [netmod] Alexey Melnikov's Discuss on draft-ietf-netmod-module-tags-07: (with DISCUSS)

[Randy Presuhn <[e-mail]>]

Hi -

On 2/17/2020 3:15 AM, Christian Hopps wrote:
...
 > BTW, I did look at the "SHOULD be avoided" (occurs twice that I saw) 
once dealing with LFs and CRs which lucky for us is not part of a tags 
allowable characters.

There are lots of other things that complicate life.  The Yang string 
definition
circumscribes some of them, but not all.

> "
>       typedef tag {
>         type string {
>           length "1..max";
>           pattern '[\S ]+';
>         }
> "

This pattern doesn't make sense to me when I try to understand it using
https://www.w3.org/TR/2004/REC-xmlschema-2-20041028/#charcter-classes
It excludes "symbols", but permits, for example, paragraph separators and
formatting characters and such delights as zero-width non-joiner. Also, in
complementing the "all symbols" category, it seems to me it already permits
space, so I don't see why it calls out space again.

Randy