From what I can tell, much of the code in this library is generated from an HTML specification taking from Microsoft. That specification includes a bunch of attributes which are not part of any web standard, but instead has special meaning when used in an ASP.NET Web UI application. Examples include EnableTheming, SubmitDisabledControls, data-FolderName etc. You can pretty much just search for capital letters in the attribute names. Since this library is used in approximately zero ASP.NET applications, I think those attributes should be deprecated and eventually removed, as they are just noise in most cases.
From what I can tell, much of the code in this library is generated from an HTML specification taking from Microsoft. That specification includes a bunch of attributes which are not part of any web standard, but instead has special meaning when used in an ASP.NET Web UI application. Examples include
EnableTheming,SubmitDisabledControls,data-FolderNameetc. You can pretty much just search for capital letters in the attribute names. Since this library is used in approximately zero ASP.NET applications, I think those attributes should be deprecated and eventually removed, as they are just noise in most cases.