Difference between revisions of "google-search"

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(move content to a Rich Snippets main page)
(note details of hReview and hReview aggregate support)
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== main search ==
 
== main search ==
[http://google.com/ Google.com] supports [[rel-nofollow]] (since 2005(?) citation needed) and as of 2009-05-12, [[hCard]], [[hReview]], [[hreview-aggregate|hReview aggregate]], [[hProduct]] in [http://www.google.com/support/webmasters/bin/answer.py?answer=99170 rich snippets] in search results.
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[http://google.com/ Google.com] supports [[rel-nofollow]], [[hCard]], [[hReview]], [[hreview-aggregate|hReview aggregate]], [[hProduct]] (since 2009-05-12 for [http://www.google.com/support/webmasters/bin/answer.py?answer=99170 rich snippets]), [[hCalendar]] ([http://googlewebmastercentral.blogspot.com/2010/01/introducing-new-rich-snippets-format.html since 2010-01-22]), and [[hRecipe]] ([http://googlewebmastercentral.blogspot.com/2010/04/better-recipes-on-web-introducing.html since 2010-04-13]) - in main search. See also [http://microformats.org/2010/04/28/google-adds-support-for-hcalendar-and-hrecipe-rich-snippets related blog post on hCalendar hRecipe support].  
  
 
=== rich snippets ===
 
=== rich snippets ===
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* See [[google-rich-snippets-examples]] for documentation of Google's microformats examples.
 
* See [[google-rich-snippets-examples]] for documentation of Google's microformats examples.
 
* See [[google-rich-snippets-issues]] for issues with Google's Rich Snippets Testing tool.
 
* See [[google-rich-snippets-issues]] for issues with Google's Rich Snippets Testing tool.
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=== reviews ===
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Google's [http://support.google.com/webmasters/bin/answer.py?hl=en&answer=146645 documentation on Rich snippets - Reviews support] describes details:
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* the main topic of the page needs to be about '''a ''specific'' product or service'''. For example, using review markup on a page containing multiple products is not supported.
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* If the markup contains a single review, the '''reviewer’s name needs to be a valid name''' (Person or Organization)
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** presumably an [[hCard]]
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[[hReview]] properties supported ('''bold''' = required)
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* '''item'''
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** fn
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* rating
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** value
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** best
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*** value-title support: <source lang=html4strict> <span class="best"><span class="value-title" title="10"/></span> </source>
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** worst
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** "Tip: Don't add a separate hidden text block to specify the rating. '''Hidden content will not be displayed.'''"[http://support.google.com/webmasters/bin/answer.py?hl=en&answer=172705]
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** img alt number parsing: <source lang=html4strict><img class="rating" src="four_star_rating.gif" alt="4 Star Rating: Recommended" /></source>
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** value-title support: <source lang=html4strict><span class="rating"><span class="value-title" title="4.5" /></span></source>
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* '''reviewer'''
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* dtreviewed
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* description
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* summary
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[[hReview-aggregate]] additional properties supported in addition to the above (or additional requirements / subproperties)
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* count - "The total number of reviews for the item on your site. Note: Whenever you include count, the page must also contain review markup for each reviewed item. count should only include reviews on your own site."
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* votes - "contributes toward the average rating but not towards the number of reviews available" - essentially, a "number of ratings" property.
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* '''rating''' - required in their hReview-aggregate support
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* rating
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** average (additional subproperty)
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* photo - though presumably this works in hReviews as well
  
 
== advanced search ==
 
== advanced search ==

Revision as of 16:27, 17 December 2012

<entry-title>Google Search</entry-title>

Google is one of several search engines that index and support microformats.

main search

Google.com supports rel="nofollow", hCard 1.0, hReview 0.4 (in progress), hReview aggregate, hProduct (since 2009-05-12 for rich snippets), hCalendar 1.0 (since 2010-01-22), and hRecipe 0.22 (since 2010-04-13) - in main search. See also related blog post on hCalendar hRecipe support.

rich snippets

Main article: Rich Snippets

Rich Snippets is Google Search's term for the enhancement of search results ("snippets") with information from microformats from pages.

reviews

Google's documentation on Rich snippets - Reviews support describes details:

  • the main topic of the page needs to be about a specific product or service. For example, using review markup on a page containing multiple products is not supported.
  • If the markup contains a single review, the reviewer’s name needs to be a valid name (Person or Organization)

hReview 0.4 (in progress) properties supported (bold = required)

  • item
    • fn
  • rating
    • value
    • best
      • value-title support:
         <span class="best"><span class="value-title" title="10"/></span>
        
    • worst
    • "Tip: Don't add a separate hidden text block to specify the rating. Hidden content will not be displayed."[1]
    • img alt number parsing:
      <img class="rating" src="four_star_rating.gif" alt="4 Star Rating: Recommended" />
      
    • value-title support:
      <span class="rating"><span class="value-title" title="4.5" /></span>
      
  • reviewer
  • dtreviewed
  • description
  • summary

hReview-aggregate 0.2 additional properties supported in addition to the above (or additional requirements / subproperties)

  • count - "The total number of reviews for the item on your site. Note: Whenever you include count, the page must also contain review markup for each reviewed item. count should only include reviews on your own site."
  • votes - "contributes toward the average rating but not towards the number of reviews available" - essentially, a "number of ratings" property.
  • rating - required in their hReview-aggregate support
  • rating
    • average (additional subproperty)
  • photo - though presumably this works in hReviews as well

advanced search

Through additional user interfaces:

search APIs

Google provides search APIs like:

see also