Abstract: A search engine that provides search results which are ordered, in part, based on an automated analysis of the organizational structure of a group of documents, as indicated by the address of the documents, is disclosed. In one embodiment, a bot crawls various websites analyzing documents, and their organizational structure, in an effort to identify documents that have an implicit high quality based on their inclusion in an index. Accordingly, the search engine provides a greater weight in ranking document relevance to those documents that have been included in certain indexes, such as top ten lists, and A-Z lists.