The name of the document being referenced. If this is an Internet
RFC/Internet Draft, or a W3C Recommendation/Note, you need only give the
file name: for example, rfc1866.txt (RFC), draft-freed-pvcsc-01.txt
(Internet-draft) or REC-PICS-labels-961031.html (W3C Recommendation).
If the document is availble in more than one format (e.g., HTML, text,
postscript) please indicate those variants here.
If the document is not one of the above, please give the full URL
for the resource..