Learning data specification

Three everyday examples

• You already know HTML ? If not you may consider this very simple tutorial to get the “how to”
  https://www.w3schools.com/html
  But up to our best knowledge this course
  https://developer.mozilla.org/en-US/docs/Learn/HTML
  is the best one we know and we will monitor you through this course.
  This one is an alternative
  https://www.websiteplanet.com/blog/html-guide-beginners
  in the form of a user manual
• Learning JSON : not a syntax but a semantic issue !
  For the syntax please consider https://goo.gl/dt5GPN
  beyond https://en.wikipedia.org/wiki/JSON#Data_types,_syntax_and_example
  But the main issue is “semantic” and we are going to understand this considering URL
• Uniform resources identifiers :  (specific course).