Commercial job postings?

[lee at sq.com]

Peter Murray-Rust wrote:
> As far as I can see, in
> validated SGML
> 
> <!Doctype A [
> <!ELEMENT A - o EMPTY>
> ]>
> <A> 
> 
> and 
> 
> <!DOCTYPE A [
> <!element a - - ANY>
> ]>
> <A></A>
> 
> both return the same result,
That depends on what you mean by "return".  ISO 8879 doesn't say anything
about anyone returning things at all.  They are not distinguished in ESIS,
but that's just because ESIS is broken in this regard.

> Can attributes have null values?  is
> 
> B=""    the same as omitting B when #IMPLIED?

No, they are not the same -- an attribute value can be zero characters,
as can an element's content.

Lee


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