%% You should probably cite rfc5384 instead of this I-D.
@techreport{ietf-pim-join-attributes-06,
    number =    {draft-ietf-pim-join-attributes-06},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-pim-join-attributes/06/},
    author =    {A Boers and IJsbrand Wijnands and Eric C. Rosen},
    title =     {{The Protocol Independent Multicast (PIM) Join Attribute Format}},
    pagetotal = 10,
    year =      2008,
    month =     oct,
    day =       6,
    abstract =  {A "Protocol Independent Multicast - Sparse Mode" Join message sent by a given node identifies one or more multicast distribution trees that that node wishes to join. Each tree is identified by the combination of a multicast group address and a source address (where the source address is possibly a "wild card"). Under certain conditions it can be useful, when joining a tree, to specify additional information related to the construction of the tree. However, there has been no way to do so until now. This document describes a modification of the Join message that allows a node to associate attributes with a particular tree. The attributes are encoded in Type-Length-Value format. {[}STANDARDS-TRACK{]}},
}