DTD Element problem

I have some xml files containing source code (or SQL queries) inside a particular tag.

In my DTD I wanted to define the element SQL to contain #CDATA, but this is not allowed.

<!ELEMENT SQL (#CDATA)> is illegal,  <!ELEMENT SQL (#PCDATA)> is legal.

In my XML files I have <![CDATA[{SQL_HERE}]> around my SQL queries - which works fine, when SQL is defined as PCDATA in the DTD.

Is there another way I can define SQL to be CDATA instead of PCDATA in the DTD? 
It seems a bit redundant to define SQL as PCDATA in the DTD and then explicitly define the contents of the SQL tag to be CDATA in the XML file.

Regards,
Flemming

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