This case is an integration test that tests multiple FOs and properties. It is a massaged excerpt from the XSL spec itself designed to test display space, lists, blocks, and very basic page layout. The input XML is valid XHTML so that its general format (but NOT the many important details!) can be seen merely by bringing up the document in a browser. The referenced HTML file is really an annotated copy of the input with some indication of expected results.
This case is a more complex integration test that tests multiple FOs and properties. It is designed to test more complex layout and some extended features. Specifically, it does multicolumn, spans, markers, different page models, and nested lists.