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salam every one, this is a topic from google web master centrale blog:

Webmaster level: Advanced

Based on your feedback, we’re happy to announce that Google web search now supports link rel="canonical" relationships specified in HTTP headers as per the syntax described in section 5 of IETF RFC 5988. Webmasters can use rel="canonical" HTTP headers to signal the canonical URL for both HTML documents and other types of content such as PDF files.

To see the rel="canonical" HTTP header in action, let’s look at the scenario of a website offering a white paper both as an HTML page and as a downloadable PDF alternative, under these two URLs:

  • http://www.example.com/white-paper.html
  • http://www.example.com/white-paper.pdf

In this case, the webmaster can signal to Google that the canonical URL for the PDF download is the HTML document by using a rel="canonical" HTTP header when the PDF file is requested; for example:

GET /white-paper.pdf HTTP/1.1
Host: www.example.com
(...rest of HTTP request headers...)
 
HTTP/1.1 200 OK
Content-Type: application/pdf
Link: <http://www.example.com/white-paper.html>; rel="canonical"
Content-Length: 785710
(... rest of HTTP response headers...)

Another common situation in which rel="canonical" HTTP headers may help is when a website serves the same file from multiple URLs (for example when using a content distribution network) and the webmaster wishes to signal to Google the preferred URL.

We currently support these link header elements for web search only. As we see how webmasters are using these elements, we're hoping to add support for them in our other properties. For more information, please see our Help Center articles about canonicalization and the rel="canonical" element. If you have any questions, please ask in our Webmaster Help Forum.

Posted by , Webmaster Trends Analyst

this is a topic published in 2013... to get contents for your blog or your forum, just contact me at: devnasser@gmail.com

from web contents: Supporting rel="canonical" HTTP Headers 2013

salam every one, this is a topic from google web master centrale blog: Webmaster Level: All

You can now check your Video Sitemap for even more errors right in Webmaster Tools! It’s a new Labs feature to signal issues in your Video Sitemap such as:
  • URLs disallowed by robots.txt
  • Thumbnail size errors (160x120px is ideal. Anything smaller than 90x50 will be rejected.)



Video Sitemaps help us to better crawl and extract information about your videos, so we can appropriately feature them in search results.

Totally new to Video Sitemaps? Check out the Video Sitemaps center for more information. Otherwise, take a look at this new Labs feature in Webmaster Tools.

Written by Jackie Lai, Video Search Teamthis is a topic published in 2013... to get contents for your blog or your forum, just contact me at: devnasser@gmail.com

from web contents: To err is human, Video Sitemap feedback is divine! 2013

salam every one, this is a topic from google web master centrale blog:
Written by Adam Lasnik, Search Evangelist

When it comes to talking with webmasters, we just can't get enough.

This past March we had the pleasure of connecting with hundreds of you online in our first-ever Webmaster Help Group online live chat, which included a presentation on Images in Google Search by Maile, lots of feedback from you on webmaster issues, a site clinic, and dozens of questions answered by folks from our Google Webmaster Central team.

Given the success of this previous chat, we've decided to do it again.  We're hosting another free live chat (dubbed JuneTune), and we'd love to have you attend!

Here's what you'll need:

What will our JuneTune chat include?  

  • INTRO:  A quick hello from some of your favorite Help Group Guides
  • PRESO:  A presentation on Personalization in Google Search by our own John Mueller.
  • FAQs:  We're calling this "Three for Three," and we'll have three different Googlers tackling three different issues we've seen come up in the Group recently.  What will they be?  You'll just have to attend the chat to find out!
  • And lots of Q&A!  You'll have a chance to type questions during the entire session, and we'll pick as many as we can to answer in writing and in speaking during the chat.

When and how can you join in?

  • Mark the date on your calendar now: Thursday, June 19, for about one hour starting at 2:00pm PDT / 5:00pm EDT / 21:00 UTC / 23:00 CET 
  • Register right now for this event. Please note that you'll need to click on the "register" link on the lefthand side.
  • Using the link e-mailed to you by WebEx (the service hosting the event), log in 5-10 minutes prior to 2pm PDT.

We hope you can stop by, and look forward to chatting with you!  In the meantime, if you have any questions, feel free to post a note in this Groups thread.
this is a topic published in 2013... to get contents for your blog or your forum, just contact me at: devnasser@gmail.com

from web contents: Join us for another live chat - June 19, 2008 2013

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