Talk:Valid characters in XML

Can anyone explain the comment "This article relies too much on references to primary sources. Please improve this article by adding secondary or tertiary sources."?

How would secondary or tertiary sources add value?

Mhkay (talk) 23:20, 18 December 2014 (UTC)

HF 20191112: same comment from me. The sources are the law. Why do we need a second opinion on the law? — Preceding unsigned comment added by 95.128.91.231 (talk) 13:03, 13 November 2019 (UTC)

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 * Added archive http://web.archive.org/web/20140228010526/http://validchar.com/d/xml10/xml10_namestart to http://validchar.com/d/xml10/xml10_namestart

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