HTML is the HyperText Markup Language, defined with tags such as <p>...</p>.

This cluster contains two important classes:

• HTML_OUTPUT_STREAM used to write some HTML correctly laid out. Instead of a generic put_string, this class offers a lot of features that control opening and closing of tags;
• HTML_PARSER used to read HTML and split it in a semantic tree. This tree is a Composite made of HTML_ELEMENTs.