@techreport{goland-state-token-00,
    number =    {draft-goland-state-token-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-goland-state-token/00/},
    author =    {Jim Whitehead and Yaron Y. Goland},
    title =     {{State Tokens and Preconditions for HTTP}},
    pagetotal = 4,
    year =      1997,
    month =     may,
    day =       22,
    abstract =  {There are times when a principal will want to predicate successful execution of a method on the current state of a resource. While HTTP/1.1 provides a mechanism for conditional execution of methods using entity tags via the 'If-Match' and 'If-None-Match' headers, the mechanism is not sufficiently extensible to express conditional statements involving more generic state indicators, such as lock tokens. This draft defines the term 'state token' as an identifier for a state of a resource. This draft defines requirements for state tokens and provides a state token syntax, along with two new headers which are used to express method preconditions using state tokens.},
}