From experience, search engines find a lot of webpages and I find it difficult to determine their authoritativeness or usefulness without actually clicking the search result. I have been trying out a search engine and in the event, the search engine was a disaster. I know some search engines uses HTML structural elements to evaluate contents of Webpages. For instance, I think Google uses an algorithm to evaluate the relevance of Web pages using tagged texts. Even if there are mechanisms for flagging semantic content such as the Extensible Markup Language, I would like to see website authors use HTML tags in a similar manner. I am feeling more positive generally that this would be the case as tags in XML are becoming more standardized. There are still quite a number of webpages authored using only HTML.