linux strict xhtml5 - SERP Analysis

https://stackoverflow.com/questions/21029612/html5-xhtml-style-strict-format-of-coding

https://blog.whatwg.org/xhtml5-in-a-nutshell

https://mathiasbynens.be/notes/xhtml5

https://softwareengineering.stackexchange.com/questions/304342/is-html5-xhtml-1-0-compliant

https://thecustomizewindows.com/2024/04/what-is-xhtml-xhtml5-working-examples/

https://robertnyman.com/2009/11/27/the-html5-syntax-options-problem/

https://www.quora.com/I-already-learnt-xhtml-and-I-was-wondering-if-it-is-necessary-for-me-to-learn-html-5-and-also-is-there-much-difference-between-the-two

https://www.reddit.com/r/webdev/comments/2qxxu1/html5_vs_xhtml/

https://en.wikipedia.org/wiki/XHTML

https://tutorial.techaltum.com/doctype.html