Reference for “Digital Signature Label Architecture”

@TechReport{Khare:97:DSL,
  author      = "Rohit Khare",
  title       = "Digital Signature Label Architecture",
  month       = jun,
  note        = "http://www.w3.org/TR/WD-DSIG-label-arch-970610",
  year        = "1997",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}