2022-12-08 UTC
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btrem It's why we got the notorious xhtml appendix c. If browsers took SGML seriously, appendix c would not have worked. (Appendix c was the part where they advised authors to use self-closing xhtml tags on empty elements, e.g., <br />. The idea was that browsers parsing the document as HTML would ignore the solidus, violating SGML shorttag notation.)