Where can i learn xml. Is thare any diffrence b/n xml and html?

There isn't a lot to learn about XML. If you open a tag you must close the tag, that's basically it. The tags in XML can be anything you want. It is up to your program to interpret it correctly. Both XML and HTML are derived from Standard Generalized Markup Language (SGML) but have nothing to do with each other. XHTML on the other hand is a derivative of HTML with stricter XML syntax. Most people on SoloLearn who ask about XML are wanting to use it for a particular application, typically GUI layouts for Android or JavaFX. Both of these cases are application specific uses and the tags involved are specific to those uses, not XML itself. See: https://www.w3schools.com/xml/default.asp

Recently I compiled some information how to deal with XML in Python. Have a look at https://code.sololearn.com/cTkYrCTYLzt4/?ref=app