At 3:28 PM 1/23/97, firstname.lastname@example.org wrote:
>David Durand writes:
>> But SYSTEM IDs should not be included. In SGML, they are reserved for
>> "non-portable" identifiers,
>No. They are system specific. They are not _required_ to be non-portable.
>SGML makes no promise that they are portable. but certainly does not say
>that any document using a portable SYSTEM identiifier is invalid!!!
A SYSTEM identifier is _always_ non-protable, because I am not _required_
to implement any semantics for SYSTEM identifiers.
>For XML, it would be possible and acceptable to requre specific forms of
>system identifiers in certain places, and in fact we have already done so
>by using URLs.
Eliot's query was about a potential SGML feature. So I answered in terms of
SGML. Actually, in SGML there's a bit better case because of FSIs, but even
there, it's thin. In XML I think the case is worse, since a URL is
well-known to be a transient thing.
But as this is not an XML issue, we should abandon it.
I am not a number. I am an undefined character.
David Durand email@example.com \ david@dynamicDiagrams.com
Boston University Computer Science \ Sr. Analyst
http://www.cs.bu.edu/students/grads/dgd/ \ Dynamic Diagrams
MAPA: mapping for the WWW \__________________________