all about html tags
Post on 15-May-2015
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All About HTML Tags
Created By: Shalaka Pawar, APM, Search Engine Optimization @Convonix
CANONICAL TAG
http://www.example.com/product.php?item=swedish-fish
http://www.example.com/product.php?item=swedish-fish&category=gummy-candy
http://www.example.com/product.php?item=swedish-fish&trackingid=1234&sessionid=5678
Place in the <head> section
<link rel="canonical" href="http://www.example.com/product.php?item=swedish-fish" />
HTML TAG
http://www.example.com/product.php?item=swedish-fish&category=gummy-candy
http://www.example.com/product.php?item=swedish-fish&trackingid=1234&sessionid=5678
MORE ABOUT CANONICAL Is rel="canonical" a hint or a directive
It's a hint that Google honors strongly. This tag is taken into preference along with other signals Google considers
Can I use a relative path to specify the canonical, such as <link rel="canonical" href="product.php?item=swedish-fish" />
Yes, relative paths are recognized as expected with the <link> tag. Also, if you include a <base> link in your document, relative paths will resolve according to the base URL.
MORE ABOUT CANONICAL
Is it okay if the canonical is not an exact duplicate of the content
Slight differences are accepted. E.g. a sort functionality on the page will display different versions of the content
What if the rel="canonical" returns a 404
Google will continue to index your content , However its is recommend that you specify existent URLs as canonicals.
MORE ABOUT CANONICAL
What if the rel="canonical" hasn't yet been indexed
Like all public content on the web, Google will discover and crawl a designated canonical URL . As soon as it is indexed, the rel="canonical" hint will be considered.
Can rel="canonical" be a redirect
Yes, you can specify a URL that redirects as a canonical URL. Google will then process the redirect as usual and try to index it.
MORE ABOUT CANONICAL
What if I have contradictory rel="canonical" designations
Google can follow canonical chains, but its is strongly recommended that you update links to point to a single canonical page to ensure optimal canonicalization results.
Can this link tag be used to suggest a canonical URL on a completely different domain
The answer is yes! Google now support a cross-domain rel="canonical" link element
CANONICAL HEADER
RESPONSE TAG
http://www.example.com/white-paper.pdf
http://www.example.com/white-paper.html
GET /white-paper.pdf HTTP/1.1Host: www.example.com(...rest of HTTP request headers...) HTTP/1.1 200 OKContent-Type: application/pdfLink: <http://www.example.com/white-paper.html>; rel="canonical"Content-Length: 785710(... rest of HTTP response headers...)
CODE REQUIRED
PREV & NEXT TAG
PAGINATION
WHERE CAN WE FIND PAGINATION?
http://www.example.com/article?story=abc&page=1
http://www.example.com/article?story=abc&page=2
http://www.example.com/article?story=abc&page=3
http://www.example.com/article?story=abc&page=4
URL OF A PAGINATED PAGE
HTML TAG
On the first page, http://www.example.com/article?story=abc&page=1, you’d include in the<head> section:<link rel="next" href="http://www.example.com/article?story=abc&page=2" />
On the second page, http://www.example.com/article?story=abc&page=2:<link rel="prev" href="http://www.example.com/article?story=abc&page=1" /><link rel="next" href="http://www.example.com/article?story=abc&page=3" />
On the third page, http://www.example.com/article?story=abc&page=3:<link rel="prev" href="http://www.example.com/article?story=abc&page=2" /><link rel="next" href="http://www.example.com/article?story=abc&page=4" />
And on the last page, http://www.example.com/article?story=abc&page=4:<link rel="prev" href="http://www.example.com/article?story=abc&page=3" />
WHAT IF I HAVE A “VIEW ALL” PAGE
CANONICAL AGAIN!
WHAT IF I DON’T PREFER “VIEW ALL”
SYNDICATION AND ORIGINAL
SOURCE
<meta name="syndication-source" content="http://www.publisherX.com/wire_story_1.html">
<meta name="original-source" content="http://www.example.com/burglary_at_watergate.html">
HTML TAG
<link rel="syndication-source" href="http://www.publisherX.com/wire_story_1.html"/>
LANGUAGE TAG
<meta http-equiv="content-language" content="en-US">
<meta http-equiv=“content-language" content= "fr">
HTML TAG
Language Representation
Arabic ar
English (United States) en-US
English (United Kingdom) en-GB
Hindi hi
Marathi mr
Polish pl
Spanish es
ALTERNATE TAG
http://en.example.com/javier-lopezeither
<link rel="canonical" href="http://es.example.com/javier-lopez" />
http://fr.example.com/javier-lopezeither
<link rel="canonical" href="http://es.example.com/javier-lopez" />
http://es.example.com/javier-lopezis
<link rel="alternate" hreflang="en" href="http://en.example.com/javier-lopez" />
and<link rel="alternate" hreflang="fr" href="http://fr.example.com/javier-lopez" />
HTML TAG
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