@techreport{ietf-calext-subscription-upgrade-09,
    number =    {draft-ietf-calext-subscription-upgrade-09},
    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-calext-subscription-upgrade/09/},
    author =    {Michael Douglass},
    title =     {{Calendar subscription upgrades}},
    pagetotal = 15,
    year =      2024,
    month =     feb,
    day =       15,
    abstract =  {This specification updates RFC5545 to add the value DELETED to the STATUS property. This specification also adds values to the Preferences Registry defined in RFC7240 to add the subscribe-enhanced-get and limit preferences and to the link relations directory defined in RFC8288.},
}