#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