SGML HTML XML What’s the Difference? (Part 1) – Computerphile

Why all the confusion, surely SGML, HTML & XML are just different versions of the same thing? Professor Brailsford on the perils of ‘*ML’

Problems with Omitted End Tags:

This video was filmed and edited by Sean Riley.

Computer Science at the University of Nottingham:

Computerphile is a sister project to Brady Haran’s Numberphile. More at



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