SharePoint Security Permissions Matrix

It looks like an MSDN article that is really useful is located under the SPPermissionGroup64 Enumeration rather than a more descriptive title. This article gives all of the possible user access levels in SharePoint and then describes which individual rights are covered by the levels. These individual rights are used when deploying features for attributes in the feature definition files like "Rights". Here is the link to this vary important SharePoint security chart: http://msdn2.microsoft.com/en-us/library/microsoft.sharepoint.sppermissiongroup64.aspx?topic=306117.