In Feb 2009 at the SMX West Google, Yahoo and Microsoft announced a new HTML tag. The new rel = “canonical” tag will help double the pages documenting the preferred URL for a group of very similar pages. Duplicate content is a major problem for search engines and seekers alike. Having duplicate content on your website can lead to penalties in search rankings. What is a canonical Page? Definition: Canonical Page is a Preferred (authoritative) page at a group of pages that have identical or nearly identical content. Examples, see below for more sites and content management system scenarios. Objectives of the new tag The goal is to use a method with webmasters to solve duplicate content crawl errors. Be able to establish, you can now to ensure a preferred version, a number of similar sites and that link popularity to your preferred page is consolidated. What you can do now is enter your preferred URL, the crawler with an HTML link tag. This will lead to better results and higher rankings! The link tag The day can be designated a preferred site to Webmaster a set of identical pages. It is used within an element and is a rel = “canonical” rel = specified “nofollow” onclick = “javascript: article_exit_link pageTracker. _trackPageview (‘/ Outgoing /’);” href = “http://yourpreferredpage”> The day is used as follows: link rel = “canonical” rel = “nofollow” onclick = “javascript: pageTracker. _trackPageview (‘/ outgoing / article_exit_link’);” href = “http://your_company_domain/product. aspx? item = Canned Yellow Peaches-” Rules for the use of new tag 1) There is a proposal and not a command for the caterpillars. 2) You can relative or absolute URLs in the USE rel = “nofollow” onclick = “javascript: pageTracker. _trackPageview (‘/ Outgoing / article_exit_link’); yourdomain” href = “. Com ‘tag part yourdomain 3) The area in which javascript rel = “nofollow” onclick = “pageTracker. _trackPageview (‘/ outgoing / article_exit_link’);” href = “. Com” must be the same domain as your preferred (canonical) page Example 1 – Multiple Home Page References For example, the four of all URLs lead to the same page (a very common scenario): http://my_company_site. com http://www. my_company_site. com http://www. my_company_site. com / default. htm http://www. my_company_site. com / default. aspx Suppose you decide as a webmaster, the second link above as preferred by your side. So if you had a choice, you prefer that your value and your SEO rankings PagePank would all be headed in that one page. You can now just that, with the rel = “canonical” day in the other three sides! For the example above, this would look like this: Example 2 – Auto-generated content from content management systems and online software store In addition to the examples of identical home pages specified above, should the link tag for pages with URLs that differ slightly because of the additional parameters are as follows: Session IDs, grades, etc. used link http://www. my_company_site. com / product. aspx? item = Canned Peaches-Yellow- http://www. my_company_site. com / product. aspx? item = Canned Yellow Peaches-& page = check-out. aspx & id = 1234456 http://www. my_company_site. com / product. aspx? item = Canned Yellow Peaches-& OrderID = ABC123 The two links at the top would be a good place to be using the following canonical day: Add the tag to put all the pages on your site that the product for the info Canned Peaches yellow, if they would produce from various places on the site called, for example, just before the box office or as a link from a shopping center when the product is easy to contrast display on the primary side. References: 1) Google Webmaster Central http://googlewebmastercentral. blogspot. com/2009/02/specify-your-canonical. html 2) Google Webmasters / Site owners Help: www. google. com / support / webmasters / bin answer /. py? answer = 139 394 & topic = 15 262 3) Yahoo Search Blog: http://ysearchblog. com/2009/02/12/fighting-duplication-adding-more-arrows-to-your-quiver 4) Live Search Webmaster Center Blog: Blogs. MSDN. com/webmaster/archive/2009/02/12/partnering-to-help-solve-duplicate-content-issues. aspx Read article submitted Saturday, February 21, 2009 & 1 times.
Website 101: Avoid Duplicate Content Penalties, Use The New Canonical HTML Tag
Dr. Howard Rybko Syncrony runs a web development and software company focused on world-class website design in South Africa. Building on the Web-based systems DotNetNuke Content Management System. http://www. Syncrony. com