a. In a DTD, how do you indicate that an element is to be repeated zero or more times? b. In a DTD, how do you indicate that an element is to be repeated one or more times? c. In a DTD, how do you...

a. In a DTD, how do you indicate that an element is to be repeated zero or more times?

b. In a DTD, how do you indicate that an element is to be repeated one or more times?

c. In a DTD, how do you indicate that an element cannot be broken down into other tags?

What is XSL?  What is the relationship between XML and XSL?  How does an XML document get viewed?