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We just updated the Data Highlighter troubleshooting guide with more tips and details:

Nice way to finish off the first week of the year :)

More about Data Highlighter:

Highlight away!
If you have problems creating or publishing a page set, look through the troubleshooting information on this page. Creating a page set After I enter my starting URL and click OK, I get a "URL not f
Birger Friedrichs (Bfri)'s profile photoNaresh Krishnamurthy's profile photoKristi Hagen's profile photoArthur Radulescu's profile photo
Hi +mariette jansen We'll make Data Highlighter available for more languages and data types in the months ahead.
Thanks Pierre, this is very helpful. My site returns a "failed to load data" error, and don't yet see troubleshoot for this response. The exact url is an events page already verified in Webmaster Tools. Has anyone else received this error?
I am looking foreward to see it work thx pierre
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