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Re: Base



At 3:28 PM 1/23/97, lee@sq.com 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.

  -- David

I am not a number. I am an undefined character.
_________________________________________
David Durand              dgd@cs.bu.edu  \  david@dynamicDiagrams.com
Boston University Computer Science        \  Sr. Analyst
http://www.cs.bu.edu/students/grads/dgd/   \  Dynamic Diagrams
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