@techreport{zhang-pcep-hierarchy-extensions-00,
    number =    {draft-zhang-pcep-hierarchy-extensions-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-zhang-pcep-hierarchy-extensions/00/},
    author =    {Fatai Zhang and Quintin Zhao and Ramon Casellas and Daniel King},
    title =     {{Extensions to Path Computation Element Communication Protocol (PCEP) for Hierarchical Path Computation Elements (PCE)}},
    pagetotal = 14,
    year =      2010,
    month =     oct,
    day =       18,
    abstract =  {The hierachical Path Computation Element (PCE) architecture defined in {[}PCE-HIERARCHY-FWK{]} allows the optimum sequence of domains to be selected, and the optimum end-to-end path to be derived through the use of a hierarchical relationship between domains. This document defines the Path Computation Element Protocol (PCEP) extensions for the purpose of implementing hierarchical PCE procedures which are described in {[}PCE-HIERARCHY-FWK{]}.},
}