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Grep the Web

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RDFa vs. Microdata

This should give a rough overview over the usage of the different formats.

grep pattern	Number of Urls	Number of Domains
property= -Common Atrribute from RDFa	570,329,353	2,907,986
itemprop= -Common Attribute from Microdata	41,578,239	199,937

List of top 100 domains in rank order:

property=
(Common Atrribute from RDFa)

URL	Site Rank
1. twitter.com	18,795
2. www.facebook.com	18,072
3. www.adobe.com	15,061
4. www.youtube.com	14,536
5. www.google.com	11,968
6. www.microsoft.com	11,867
7. en.wikipedia.org	11,560
8. www.amazon.com	8,964
9. tinyurl.com	8,696
10. www.linkedin.com	8,428
11. sourceforge.net	8,291
12. forum.bodybuilding.com	8,212
13. www.belaircamera.com	8,212
14. www.flixster.com	8,212
15. www.onlyshqip.com	8,212
16. www.silobreaker.com	8,212
17. www.techradar.com	8,212
18. www.welt.de	8,212
19. www.flickr.com	8,167
20. vimeo.com	8,030
21. www.myspace.com	7,968
22. validator.w3.org	7,912
23. www.addthis.com	7,796
24. wordpress.com	6,712
25. creativecommons.org	6,636
26. wordpress.org	6,497
27. www.nytimes.com	6,220
28. itunes.apple.com	6,080
29. www.bbc.co.uk	5,888
30. blogs.oreilly.com	5,887
31. www.rtl.fr	5,887
32. bit.ly	5,829
33. www.paypal.com	5,707
34. www.mapquest.com	5,695
35. www.w3.org	5,631
36. picasaweb.google.com	5,551
37. sites.google.com	5,404
38. www.gnu.org	5,380
39. feeds.feedburner.com	5,340
40. www.imdb.com	5,220
41. www.guardian.co.uk	5,178
42. www.pbs.org	5,105
43. www.cnn.com	5,079
44. www.cdc.gov	5,057
45. www.washingtonpost.com	4,918
46. issuu.com	4,635
47. www.who.int	4,520
48. youtu.be	4,496
49. www.telegraph.co.uk	4,469
50. ec.europa.eu	4,457
51. www.usatoday.com	4,375
52. www.mozilla.org	4,331
53. www.whitehouse.gov	4,329
54. online.wsj.com	4,314
55. mashable.com	4,269
56. code.google.com	4,250
57. www.npr.org	4,244
58. www.wired.com	4,228
59. www.reuters.com	4,208
60. www.forbes.com	4,169
61. www.ncbi.nlm.nih.gov	4,149
62. github.com	4,113
63. www.un.org	4,093
64. www.epa.gov	4,085
65. digg.com	3,954
66. www.slideshare.net	3,948
67. www.msnbc.msn.com	3,935
68. news.bbc.co.uk	3,933
69. books.google.com	3,869
70. slashdot.org	3,858
71. twitpic.com	3,852
72. soundcloud.com	3,821
73. news.yahoo.com	3,799
74. abcnews.go.com	3,794
75. www.angelfire.com	3,784
76. www.scribd.com	3,758
77. www.weather.com	3,758
78. groups.google.com	3,746
79. www.huffingtonpost.com	3,742
80. www.time.com	3,741
81. nytimes.com	3,724
82. www.ibm.com	3,713
83. www.nasa.gov	3,693
84. www.latimes.com	3,642
85. www.bloomberg.com	3,633
86. groups.yahoo.com	3,612
87. homepage.mac.com	3,606
88. www.archive.org	3,591
89. support.microsoft.com	3,591
90. www.blogger.com	3,551
91. drupal.org	3,539
92. salesforce.com	3,538
93. www.cbsnews.com	3,529
94. ezinearticles.com	3,506
95. www.wunderground.com	3,498
96. www.businessweek.com	3,494
97. photobucket.com	3,485
98. www.ustream.tv	3,456
99. www.amazon.co.uk	3,441
100. www.boston.com	3,421

itemprop=
(Common Attribute from Microdata)

URL	Site Rank
1. twitter.com	18,091
2. www.youtube.com	14,536
3. www.google.com	11,968
4. www.microsoft.com	11,866
5. sourceforge.net	8,291
6. www.myspace.com	7,968
7. www.addthis.com	7,560
8. www.nytimes.com	6,220
9. www.w3.org	5,631
10. sites.google.com	5,380
11. feeds.feedburner.com	5,340
12. www.imdb.com	5,220
13. www.guardian.co.uk	5,178
14. www.pbs.org	5,105
15. docs.google.com	4,791
16. wordpress.org	4,624
17. www.telegraph.co.uk	4,469
18. spreadsheets.google.com	4,354
19. mashable.com	4,254
20. code.google.com	4,250
21. github.com	4,113
22. www.npr.org	4,104
23. www.slideshare.net	3,948
24. www.msnbc.msn.com	3,935
25. books.google.com	3,869
26. slashdot.org	3,858
27. abcnews.go.com	3,794
28. www.scribd.com	3,758
29. groups.google.com	3,746
30. www.huffingtonpost.com	3,742
31. www.ibm.com	3,713
32. news.yahoo.com	3,660
33. www.usatoday.com	3,602
34. www.blogger.com	3,551
35. drupal.org	3,492
36. www.loc.gov	3,420
37. addons.mozilla.org	3,396
38. web.mit.edu	3,348
39. www.abc.net.au	3,348
40. msdn.microsoft.com	3,257
41. www.foxnews.com	3,218
42. www.theatlantic.com	3,088
43. www.dailymail.co.uk	2,979
44. www.freewebs.com	2,971
45. home.earthlink.net	2,889
46. www.cbc.ca	2,864
47. www.examiner.com	2,844
48. earth.google.com	2,812
49. foursquare.com	2,759
50. www.cafepress.com	2,696
51. www.unesco.org	2,685
52. market.android.com	2,672
53. www.last.fm	2,643
54. www.engadget.com	2,641
55. www.tripadvisor.com	2,571
56. www.nydailynews.com	2,527
57. www.ebay.com	2,446
58. www.meetup.com	2,442
59. www.dailymotion.com	2,422
60. www.indiana.edu	2,416
61. www.eff.org	2,407
62. www.bbb.org	2,397
63. www.apa.org	2,396
64. home.comcast.net	2,381
65. plus.google.com	2,377
66. feeds2.feedburner.com	2,352
67. www.samsung.com	2,314
68. www.mtv.com	2,300
69. www.reverbnation.com	2,273
70. www.informationweek.com	2,250
71. blogs.msdn.com	2,238
72. launchpad.net	2,233
73. search.barnesandnoble.com	2,223
74. disney.go.com	2,148
75. www.exploratorium.edu	2,143
76. www.scientificamerican.com	2,127
77. www.sciam.com	2,117
78. www.ichotelsgroup.com	2,094
79. www.ehow.com	2,091
80. hubpages.com	2,081
81. www.politico.com	2,073
82. www.webmd.com	2,073
83. www.businesswire.com	2,059
84. www.w3schools.com	2,057
85. searchenginewatch.com	2,026
86. googleblog.blogspot.com	2,014
87. www.readwriteweb.com	2,014
88. www.yelp.com	2,012
89. stackoverflow.com	2,007
90. www.barnesandnoble.com	1,958
91. www.businessinsider.com	1,943
92. www.squidoo.com	1,919
93. www.lonelyplanet.com	1,909
94. www.cbs.com	1,903
95. www.rollingstone.com	1,902
96. www.washington.edu	1,897
97. animoto.com	1,871
98. searchengineland.com	1,849
99. cgi.ebay.com	1,844
100. www.azcentral.com	1,815

for the complete list email sales@blekko.com

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RDFa vs. Microdata