[regext] Re: [IANA #1410981] expert review for draft-ietf-regext-epp-eai (xml-registry)

[Tim Bray <[e-mail]>]

On Jan 17, 2025 at 6:22:32 AM, "Gould, James" <[e-mail]> wrote:

> Tim,
>
>
>
> Thank you for the review.  In your note, is the concern that the namespace
> prefix is being used for the element name (e.g., “addlEmail”)?  I found
> similar definitions in the following EPP RFCs, which are broadly
> implemented:
>
>
>
> ·         EPP RFC 5730 with xmlns:epp="urn:ietf:params:xml:ns:epp-1.0"
> and <element name="epp" type="epp:eppType"/>.
>

No, the element name is fine, it’s the value of the “type” attribute that
is troublesome.  The namespace prefix “epp" is really only designed to
prefix element & attribute names, not to be used inside the element content
or the attribute value.  There aren’t any standards (afaik) that require a
standard off-the-shelf XML processor to make those prefix/URI mappings
available.

For example, would you expect this to work?

<something xmlns:foo="urn:ietf:params:xml:ns:epp-1.0”><element name="epp"
type=“foo:eppType”/>

I mean, it’s probably OK, enough people do this that most XML software can
handle it. It’s just that as the designated XML pedant, I feel I should
point out departures from the letter of the standard.

 -T