Hi to all! Hope to get an exact assistance with u ... 1) Just wandering about the sources that how used this coding and what is the advantage of this? 2) Can we directly use this coding OR the reference of "http://www.w3.org ? 3) If with the reference of "http://www.w3.org, then how to create it ? 4) Suggest me if this coding helpful for search engine ranking OR not.. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <meta name="rating" content="General" /> <META NAME="robots" CONTENT="index,follow"> <meta name="revisit-after" content="2 Days" /> Any suggestion would be greatly appreciated. Thanks