Re: [xml] xmllint - what does the error message "work/xslt/export_ifc.xml:2 : error: Content error in the external subset" mean?

[Daniel Veillard <veillard redhat com>]

On Tue, Aug 26, 2003 at 04:52:25PM +0200, EXTERN Chakirov Timour (TZ CIS; DS/ESQ3) wrote:
> ------------------------%<----------------------
> user:group> xmllint --dtdvalid
> "file:///home/user/etc/xml/edc/filelist/1.0/dtd/export_ifc.dtd" --noout
> work/xslt/export_ifc.xml
> work/xslt/export_ifc.xml:2: error: Content error in the external subset
> <!DOCTYPE FILE-LIST PUBLIC "-//EDC//filelist 1.0//EN" "">
> ^
> work/xslt/export_ifc.xml:2: error: Extra content at the end of the document
> <!DOCTYPE FILE-LIST PUBLIC "-//EDC//filelist 1.0//EN" "">
> ^
> ------------------------%<----------------------
> What does these error messages mean? 

Your XML element should have a system identifier not empty (second string
in the doctype). Actually you should use

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE FILE-LIST PUBLIC "-//EDC//filelist 1.0//EN"
   "file:///home/user/etc/xml/edc/filelist/1.0/dtd/export_ifc.dtd">
 ...

 and use xmllint --valid work/xslt/export_ifc.xml

Basically an empty string for the URI reference, means you want to use
the XML document as the DTD, and xmllint raises an error because 
<!DOCTYPE construct is a well formedness error if found in a DTD.

In a nutshell: never use "" for the system identifier !

Daniel

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