* JSON objects are indeed collections of key-value pairs, where each key is a string, and the value can be a string, number, boolean, array, or another object. JSON is often used for data interchange due to its lightweight and readable format. Reference: JSON Introduction.
* The syntax of XML includes tags, elements, and attributes. XML uses a hierarchical structure with opening and closing tags to define elements, and attributes provide additional information about elements. XML is widely used for data representation and transport. Reference: XML Basics.
JSON arrays, in contrast, are ordered collections of values (not key-value pairs), and XML objects are more complex structures with elements and attributes rather than simple key-value pairs.