Combining external entities with DTDs

[Julian Reschke <julian.reschke@gmx.de>]

Hi,

I've got an XML document that refers to an external DTD, such as:

<!DOCTYPE Page SYSTEM "cfl.dtd">
<Page>
...
</Page>

Now I'd like to include content from external document using external
entities.

Can I declare the external entitity in the header of my XML instance file
without having to modify the DTD?

Thanks,

Julian