google-search: Difference between revisions

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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.
[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.
=== reviews ===
Google's [http://support.google.com/webmasters/bin/answer.py?hl=en&answer=146645 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)
** presumably an [[hCard]]
[[hReview]] properties supported ('''bold''' = required)
* '''item'''
** fn
* rating
** value
** best
*** value-title support: <source lang=html4strict> <span class="best"><span class="value-title" title="10"/></span> </source>
** worst
** "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]
** img alt number parsing: <source lang=html4strict><img class="rating" src="four_star_rating.gif" alt="4 Star Rating: Recommended" /></source>
** value-title support: <source lang=html4strict><span class="rating"><span class="value-title" title="4.5" /></span></source>
* '''reviewer'''
* dtreviewed
* description
* summary
[[hReview-aggregate]] 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 ==
== 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, hReview, hReview aggregate, hProduct (since 2009-05-12 for rich snippets), hCalendar (since 2010-01-22), and hRecipe (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'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 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 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