Using system variable in dtd declaration in an xml file

[ezmiller]

I tried the following but it did not work:

<!DOCTYPE article SYSTEM "%XMLNOTESPROJECT%/article_notes.dtd">

where XMLNOTESPROJECT is a system variable with the path of the dtd
file.

Why does this not work?

This is the response I get when trying to view the xml file in
iexplorer:

The XML page cannot be displayed
Cannot view XML input using XSL style sheet. Please correct the error
and then click the Refresh button, or try again later.


--------------------------------------------------------------------------------

The system cannot locate the resource specified. Error processing
resource '%XMLNOTESPROJECT%article_notes.dtd'. Error pro...

<!DOCTYPE article SYSTEM "%XMLNOTESPROJECT%article_notes.dtd">

 

[Johannes Koch]

I tried the following but it did not work:

<!DOCTYPE article SYSTEM "%XMLNOTESPROJECT%/article_notes.dtd">

where XMLNOTESPROJECT is a system variable with the path of the dtd
file.

Why does this not work?

Because the system identifier has to be a URI.