On 26/07/2021 18:43, Amelia A Lewis wrote:
> Since this would be incompatible with XML+Namespaces-in-XML anyway, use
> colon instead of dot as your delimiter:
>
> <com:example:myvocabulary:top>
> <middle />
> </com:example:myvocabulary:top>
>
> which would be equivalent to:
>
> <com:example:myvocabulary:top>
> <com:example:myvocabulary:middle />
> </com:example:myvocabulary:top>
>
> This also helps to underscore that while domain names guarantee (FSDO
> "guarantee") uniqueness, it is not required that the namespace part of
> the name be a domain name, just that it be probably-unique. The abuse
> of the colon also helps to immediately identify this as
> not-XML+Namespaces-in-XML.
Agreed, colon works nicely too.
And "encouraged" to be domain name based is probably the best one can
hope for.
> (For a new syntax you could even say that an end tag adopts the
> namespace of its start tag if it is not fully qualified, for example:
>
> <com:example:myvocabulary:top>
> <middle />
> </top>
>
> That last bit is a nice touch. When manually writing XML, forgetting to
> prefix the end tag is my most common typing error.
>
> The syntax, using both forms of minimization, produces a much higher
> signal:noise ratio for a single-namespace document than XML with a
> namespace bound to a non-default prefix (granted that it's only a
> slight improvement over the equivalent single-namespace document bound
> to the default prefix). That benefit increases as additional namespaces
> are added (as a rule, documents containing foreign-namespace elements
> contain those elements in single-namespace blocks, in my experience).
>
> Global attributes are equally simple. Importantly, I think, the current
> syntax for (global) attributes from namespaces with reserved prefixes
> can be preserved here: xml:id, xml:base, xml:lang, xsi:type, but these
> reserved short prefixes (as they are now) become reserved short
> namespaces. For that matter, W3C could fund itself (a little) by
> selling a registry service for well-known single-part namespaces
> (canonically, domain names contain a minimum of two parts, so all
> single-part namespaces are potentially administratively controllable by
> a single entity).
That's a nice feature. And the fact registered short prefixes fits in
so neatly with the standard prefixes is very appealing.
Pete.
--
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Pete Cordell
Codalogic Ltd
Read & write XML in C++, http://www.xml2cpp.com
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