How does a cascading style sheet allow the analyst to produce output and what are the advantages of using an extensible style language transformations instead of a cascading style sheet?

How does a cascading style sheet allow the analyst to produce output and what are the advantages of using an extensible style language transformations instead of a cascading style sheet?

Requirements:

* Your discussion should be approximately 200 words.
* Correct grammar, spelling and punctuation are expected.
* Provide your sources of information (references).