Notations in the external Subset

[Sangineto Stefano]

Saluti

I know that I have to declare a Notation for each unparsed entity format eg.
jpeg, gif.

Now I would like to declare all the necessary notations in the external DTD
subset, so each author could use the same notation names within the document
instances. In the internal DTD-Subsets they would have only to declare the
(image) entity, for example:

<?xml version="1.0"?>
<!DOCTYPE nachricht SYSTEM "nachricht.dtd" [
<!ENTITY bild SYSTEM "ferien.jpg" NDATA jpg>
]> 
<nachricht>
...

I read in the XML specification that the internal subset is processed before
the external subset. Is this the reason for my xml-editor error messages
(Notation not declared Line 3)? 
Is there a way to get round this annoying problem or must each author
declare his own notations?

Please help
Stefano 

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