XML, or Extensible Markup Language, is a markup language used to describe data and store information in a variety of formats. It is the most widely used data language for software applications and web services. Examine the following XML code and select the true statement:

  

    $39.99

    12

  

The true statement is that this code is an example of a well-formed XML document.

XML documents consist of elements, attributes, and values. Each element contains a start tag, content, and an end tag. All elements must have matching start and end tags to create a valid document. This XML code contains a root element, , and one child element, . Inside the element are two elements, and which are containers for data. Additionally, the element has an attribute name="Shoes", which is used to identify the element. This code also contains the declaration line , which holds the version number of the XML document and declares the character encoding used.

With all elements having matching start and end tags, an attribute for the element, and a declaration line, this code is an example of a well-formed XML document.