title: What is XML Schema metadata?
body: <p>I am currently working on the assignment but I do not understand what is meant by 'metadata'</p>
  
  <p>One element in my XML Schema must be:</p>
  
  <p>when entry last was updated: date and time (metadata)</p>
  
  <p>I do know that the type used for date and time can be something like</p>
  
  <p>xsi:dateTime but I do not know what is meant by metadata.</p>
  
  <p>What does this mean?</p>