vti_longfilenames Meta-key
Applies to: SharePoint Foundation 2010
Value Type: Integer
Access Code: X
MS-DOS supports file names of up to eight characters with a three character extension. Microsoft Windows supports file names of up to 255 characters (long file names).
If the value of this meta-key is 1, the server supports long file names. If the value of this meta-key is 0, the server dos not support long file names.