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What are high and low values in sharepoint 2013 user permissions?

    Question

  • So I hit this api:

    http://win-a3q7ml82p8f/sharepoint_site/_api/web/roledefinitions/

    And got the different high and low values. But I am not clear with what they mean:

    For eg:

    High: 176, Low: 138612833

    and

    High: 176, Low: 138612801

    So for different values of Low how does it change the permissions?

    For 176 its binary is 10110000. So looking at this table here: http://www.dctmcontent.com/sharepoint/Articles/Permissions%20and%20Mask%20Values.aspx

    I can understand that 176 would mean the following set of permissions:

    • DeleteVersions
    • OpenItems
    • ApproveItems

    But what's confusing me is, that user has OpenItems permissions but not ViewListItems permission? Am I wrong in understanding this?

    Also how does the value of Low change the overall user permissions?

    Note: I looked at this answer: http://social.msdn.microsoft.com/Forums/sharepoint/en-US/9d6df168-e8f5-4323-8c34-0646c03eff68/rest-api-what-are-high-and-low-in-effectivebasepermissions-and-getusereffectivepermissions?forum=sharepointdevelopment

    But honestly I cant understand what that means. Can someone help please?

    Monday, January 13, 2014 5:52 AM

Answers