Baidu began to support the support of canonical tags through the algorithm to identify specifications Web page

Webmaster Network (www.admin5.com/) January 8 News, today Baidu Webmaster platform issued announcements, announced that Baidu began to support canonical label. In order to avoid duplication of content, Baidu will use the algorithm to identify the content of the Web page and link, the content of the same or highly similar to the page, will calculate a system that the specification of the Web page results indexed and user inquiries. A webmaster can specify a canonical Web page for a search engine by adding the <link> element and rel= "canonical" attributes to the

Announcements are as follows:

　What is the function of canonical label?

For a group of content exactly the same or highly similar to the Web page, by using the canonical tag can tell the search engine which page is the canonical page, can standardize the Web site and avoid multiple content in the search results of the same or similar pages, to help solve the problem of duplicate content collection, Avoid the same content Web site repeat display and weight of the dispersion, improve the weight of the standard Web page, optimize the standard page rankings.

　Second, what is the canonical Web page?

A canonical web page is a preferred version of a Web page that has exactly the same or a highly similar set of content.

　third, why to specify the specification Web page ?

In order to avoid duplication of content, Baidu will use the algorithm to identify the content of the Web page and link, the content of the same or highly similar to the page, will calculate a system that the specification of the Web page results indexed and user inquiries.

After supporting the canonical tag, the webmaster can specify the canonical Web page for the search engine by adding the <link> elements and rel= "canonical" attributes to the

There are several examples of how to set up a canonical Web page:

For example, a community post may be due to the top, highlight color and other behavior caused by the same content of a page to produce different links, search engines will only select one of the links to build the index, such as the following two links are different, the content is exactly the same page:

http://bbs.zhanzhang.baidu.com/forum.php?mod=viewthread&tid=9502&highlight=

Http://bbs.zhanzhang.baidu.com/thread-9439-1-1.html

For example, the list page of the goods, sorted by price or preferential order, but the content of the Web page is highly similar:

Http://mall.leho.com/pr-list?locid=75fb2a357d38397c5e1e75fa&cid=5e1e02f950a4101fb27571ee&order= Discount

Http://mall.leho.com/pr-list?order=price_asc&locid=75fb2a357d38397c5e1e75fa&cid= 5e1e02f950a4101fb27571ee

For example, the site has multiple Web pages showing the same model of goods, only the color of each page is different, the other content is almost completely similar, at this time also can set rel= "canonical", will be the most popular color of the current page set up the standard Web page, recommended Baidu has the priority to display it in search results.

　　Iv. How to specify the canonical Web site?

You can specify a canonical URL by adding a rel= "canonical" link to each of the non-standard versions of the HTML Web page.

For example, to specify a canonical link to a Web page http://www.example.com/product.php?id=15786, you need to create a <link> element in the following form: <link rel= "canonical" href = "http://www.example.com/product.php?id=15786"/> Copy the above link to a page (for example, http://www.example.com/product.php?) id=15786&active=1) all non-canonical web versions of the

　　Five, Baidu will fully comply with the rel= "canonical" Label it?

Add the label on the Web page, on behalf of the webmaster to recommend a Web page as the most standardized version of the Web, Baidu will also be based on the recommendation of the label and system algorithm to select the most appropriate page to display in the search results. Baidu will be based on the actual content of the page to consider the canonical label recommended pages, but do not guarantee full compliance with the label. To guarantee the effect of the label, make sure that there is only one canonical tag in a page.

　Six, this link is relative or absolute?

Rel= "canonical" can be used with relative links or absolute links, but it is recommended that you use absolute links to minimize possible confusion or problems.

　　Seven, rel= "canonical" label can be used in different domain names to recommend the canonical URL?

If the site needs to replace the domain name, and the use of the server can not create a server side directed URLs, you may use the rel= "canonical" link element to specify the site you want Baidu included domain.