Request: more SGML restriction explanations
Eve L. Maler
elm at arbortext.com
Mon Jun 30 16:07:24 BST 1997
At 11:35 AM 6/30/97 +0000, Simon North wrote:
>Please accept my apologies if these are non-developmental questions,
>and my heartfelt thanks to all that have answered my earlier
>question.
>
>I am trying to establish a few points and would appreciate some
>enlightened answers ...
>
>1. Is <!ENTITY #DEFAULT ""> allowed? This was really useful SGML
>and would probably be pretty handy in XML.
#DEFAULT entity declaration isn't allowed as part of XML.
>2. Are MS, MD, STARTTAG and ENDTAG forbidden in declarations?
Yes; bracketed text entities aren't allowed as part of XML.
>3. What exactly is meant by "no attribute value specs on ENTITY
>declarations"?
In SGML, data attributes are declared for notations and their values
specified as part of NDATA entity declarations. Data attributes are not
allowed as part of XML.
>4. I'm not allowed data attributes on NOTATIONs, and I'm not allowed
>name groups in ATTLISTs, but can I cheat and use the following:
>
> <!ATTLIST #NOTATION element_name attribute_name attribute_spec>
>
>or would this be illegal too? Could I get rouind it by using a data
>attribute spec?
Nope, not allowed as part of XML. Sorry!
Eve
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