This page is testing how search engine indexing robots traverse relative links: links that refer to pages on the same site by their location in relation to the linking page. For more information, see the Relative Links Test page, and the Robot Indexing Test page.
This page is only linked to by the Test2 page in a subdirectory, using the correct syntax <../ test3.html> so it will only appear if that page is indexed and the syntax is properly followed by the robot indexer.
Search Codes: RTest, RTest173, RTestGood, RTestGood173