I find this URL (or a similar one) always on HTML files, XML, XSD… Like ‘http://www.w3.org/2001/XMLSchema‘ or ‘http://www.w3.org/2001/XMLSchema-instance‘ I always wonder what those URLs means. Even offline the XML or HTML document works without changes. What’s the benefits on links to those URLs?? Thanks
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Those URLs do not necessarily point to any website/server. They are a convenient naming mechanism. The idea is since every company will have a unique website, using that as their namespace will avoid clashes. Hence better interoperability. Hence the custom.
Namespaces in XML 1.0 Specification