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Re: Why is the file suffix of XML Schemas .xsd and not.xsd.xml
- From: David Carlisle <d.p.carlisle@gmail.com>
- To: "Costello, Roger L." <costello@mitre.org>
- Date: Thu, 3 Oct 2019 13:15:17 +0100
Hi Folks,
An XML Schema document is an XML document, so why isn't the file suffix of XML Schema documents .xsd.xml?
Example: Bookstore.xsd.xml
To take it a step further, an XML document is a text document, so why isn't the file suffix of an XML document .xml.txt? Thus an XML Schema document would have the file suffix .xsd.xml.txt to indicate that the document is (1) an XML Schema document, which is (2) an XML document, which is (3) a text document.
I don't think it is mandated which extension you use so you can use .xml if you want. On the web at least, most applications are supposed to ignore the extension and go by whatever the http headers say, so if you want to give your schema files a .ppt extension that's fine so long as they are served with the
right mime type specifying XML schema.
Using multiple chained extensions looks like it is going to be confusing in the end.
no extension listed here for example has multiple dots:
Likewise, why isn't the file suffix of an XSLT document .xsl.xml.txt?
It seems like that would have the advantage of showing with great clarity of type of file it is. Yes?
No it would complicate the lookup for filename to mimetype mappings
changelog-5.2.xml
for example is that an xml version of changelog for release 5.2 of something or a 2.xml version of a changelog for version 5. Humans need to do this and also any system reading off the filesystem with no http header information.
Rather than just looking up known extensions you would have to iterate back through the filename and take the longest known suffix.
David
/Roger
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