Access to deleted revisions requires particular user rights ('deletedhistory' for the equivalent of the history page and 'deletedtext' to see the wikitext), in large part because such revisions are often deleted for legal or privacy reasons.

To get this access on the English Wikipedia, you would have to become an administrator, checkuser, or oversighter, or you would have to work out whether https://meta.wikimedia.org/wiki/Research:Committee is still active and willing to grant the "Researcher" group.

On Tue, Mar 10, 2015 at 10:12 AM, shiyue zhang <byryuer@gmail.com> wrote:

发件人: shiyue zhang [mailto:byryuer@gmail.com]
发送时间: 2015年3月10日 22:04
收件人: mediawiki-api@lists.wikimedia.org
主题: why I can't see deleted revision information?

Hello,
I’m a new user of Wikipedia. My username is Yuer3677.
I’m a senior student in BUPT China, since I am working on my graduating thesis, which is related to Wikipedia, I really need to get the deleted revision information.
I try to use action=“query” and list=” deletedrevs”, but the result is
 <?xml version="1.0"?>
<api servedby="mw1192">
<error code="drvpermissiondenied" info="You don’t have permission to view deleted revision information" xml:space="preserve">See https://en.wikipedia.org/w/api.php for API usage</error>
</api>
So, I want to know why I can’t view the deleted revision information? Since I really need the data to do my research, what can I do to get the information?
Please help me. Thanks a lot!
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Brad Jorsch (Anomie)
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