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Date: Tue, 13 Jul 2021 18:56:28 +0000
From: "Peter Stuge (peter AT stuge DOT se) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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Subject: Re: [geda-user] file format cooperation
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Roland Lutz wrote:
> > Roland, is there already a DTD or XSD for your XML format? I didn't
> > see mention of one in the doc. If not, I'll volunteer to write one.
> 
> I chose XML because it's relatively well-known and because files can be
> displayed in a browser given an appropriate XSL stylesheet, but I don't
> know too much about its more advanced aspects.

Fair!

DTD "Document Type Definition" is from SGML times, more limited and
on top of that looks kinda ugly IMO.

XSD "XML Schema Definition" is itself an XML document.

This is good discussion on the two:

https://en.wikipedia.org/wiki/Document_type_definition#XML_DTDs_and_schema_validation

I tend towards XSD.


> What advantage do you think having an DTD or XSD would have?

It allows validation of XML documents which is nice for testing but
perhaps more importantly a formal description of the XML format can
function very well as single point of truth across multiple projects
wanting to interoperate using the format - the standardization point.


//Peter