Do I need to know SGML or HTML before learn XML

Do I need to know SGML or HTML before learn XML?




No, though it's useful since a lot of XML terminology and practice derives by two decades' experience of SGML.
Ensure that knowing HTML is not similar as understanding SGML. However, HTML was written such as an SGML application, browsers avoid most of this (that is why so many helpful things don't work), therefore just because something is completed a certain way in HTML browsers does not implies it's correct, least of all in XML.

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