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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