Jim,
sorry for missing out the "without" for the NDATA stuff; I mean it;
Also, i tried the following just a few moments back -
<!ENTITY imageFile SYSTEM "demo.gif">
without the NDATA keyword; When it run the xml document thru the validator, it tried to read the demo.gif (placed by me in the local directory) and complained about its contents
; Then when i changed it as below -
<!NOTATION img SYSTEM "imageViewer">
<!ENTITY imageFile SYSTEM "demo.gif" NDATA img>
it went fine thru the validator; This endorses the relevance of the NDATA keyword for the external unparsed entities;
Please let me know if you have any doubts; I'm also learning a lot of things in the process;
Thanks