Merge pull request #8 from lmalhoit/patch-4

Add in XML definition

Author: annegentle

labs/coding-101-rest-basics-ga/2.md

@@ -40,4 +40,6 @@ In this example, you request the list of hosts, and that information is returned
 
 (<a href="http://www.json.org/" target="_blank">JSON</a> -- JavaScript Object Notation, is a lightweight text-based open standard designed for human-readable data interchange.)
 
+(<a href="https://www.w3schools.com/xml/xml_whatis.asp" target="_blank">XML</a> -- eXtensible Markup Language, a language designed to store and transport data.)
+
 ### Next Step: HTTP Response Request Facts