Biblatex-Tester-Edtf-YearsExceedingFourDigits-Basic.tex

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@book{plato_2004_republic,
  author = {{Plato}},
  date = {2004},
  origdate = {-0379~},
  title = {Republic},
  note = {bibtex*: plato\_2004\_republic},
  translator = {Reeve, C. D. C.},
  publisher = {{Hackett Publishing Company, Inc.}},
  pagetotal = {392},
  isbn = {0-87220-737-4},
  edition = {3rd edition},
  location = {{Indianapolis}},
  timestamp = {2017-08-13T08:21:57Z}
}

@book{epictetus_1916_enchiridion,
  author = {{Epictetus}},
  date = {1916},
  origdate = {0125~},
  title = {Enchiridion},
  addendum = {Arrian was the disciple who compiled this work.},
  note = {bibtex*: epictetus\_1916\_enchiridion},
  editoratype = {collaborator},
  translator = {Matheson, P. E.},
  editora = {Arrian},
  url = {http://www.sacred-texts.com/cla/dep/dep102.htm},
  timestamp = {2017-08-13T08:21:57Z}
}

@article{chalmers_1995_facing,
  author = {Chalmers, David J.},
  date = {1995-03-01},
  title = {Facing up to the Problem of Consciousness},
  keywords = {Consciousness,dualism,experience,explanation,functionalism,hard problem,information,materialism,qualia,reduction},
  note = {bibtex*: chalmers\_1995\_facinga},
  pages = {200--219},
  journaltitle = {Journal of Consciousness Studies},
  number = {3},
  abstract = {To make progress on the problem of consciousness, we have to confront it directly. In this paper, I first isolate the truly hard part of the problem, separating it from more tractable parts and giving an account of why it is so difficult to explain. I critique some recent work that uses reductive methods to address consciousness, and argue that these methods inevitably fail to come to grips with the hardest part of the problem. Once this failure is recognized, the door to further progress is opened. In the second half of the paper, I argue that if we move to a new kind of nonreductive explanation, a naturalistic account of consciousness can be given. I put forward my own candidate for such an account: a nonreductive theory based on principles of structural coherence and organizational invariance and a double-aspect view of information.},
  url = {http://www.ingentaconnect.com/content/imp/jcs/1995/00000002/00000003/653},
  issn = {1355-8250},
  volume = {2},
  timestamp = {2017-08-13T08:21:57Z}
}

@book{galilei_1590_motion,
  author = {Galilei, Galileo},
  date = {1590~},
  title = {On Motion},
  addendum = {In Latin ``De Motu Antiquiora"},
  note = {bibtex*: galilei\_1590\_motion},
  timestamp = {2017-08-13T08:21:57Z}
}

@book{aquinas_1273_compendium,
  author = {Aquinas, Thomas},
  date = {1273~},
  title = {Compendium of Theology},
  note = {bibtex*: aquinas\_1273\_compendium},
  timestamp = {2017-08-13T08:21:57Z}
}

@book{aquinas_1256_two,
  author = {Aquinas, Thomas},
  date = {1256?},
  title = {Two Sermons from {{MS}} Florence},
  note = {bibtex*: aquinas\_1256\_two},
  timestamp = {2017-08-13T08:21:57Z}
}

% Years exceeding four digits
@book{rebels_y-51234_rebel,
  author = {{Rebels}},
  title = {Rebel Plans for Death Star Attack},
  addendum = {This is going to contradict Star Wars cannon},
  year = {y-51234},
  timestamp = {2017-10-22T01:00:57Z}
}

@book{seldon_y52000_encyclopedia,
  author = {Seldon, Hari},
  title = {Encyclopedia Galactica},
  year = {y52000},
  publisher = {{The Psychohistorians}},
  location = {{Terminus}},
  timestamp = {2017-10-22T01:06:37Z}
}

\end{filecontents}

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\begin{document}
  
\section{Key}

Reference entries are sorted in citation order to make following the examples easier. Conventionally you'd sort by Author, date, title.

\textcolor{MetaColor}{Addendum in this color.}


\begin{refsection}
  \section{Common}
  \begin{tabular}{|l|l|l|}
    \hline
    \textbf{Description} & \textbf{Input} & \textbf{In text citation result}\\
    \hline  
    \noalign{\bigskip}
    
    \hline 
    \multicolumn{3}{|l|}{\textbf{Typical}}\\
    \hline
    Typical citation of a modern work & 1995 & \autocite{chalmers_1995_facing} \\ 
    \hline 
    \noalign{\bigskip}
    
    \hline 
    \multicolumn{3}{|l|}{\textbf{Approximate and uncertain}}\\
    \hline  
    Approximate, circa (``ca.") & 1590\mytilde & \autocite{galilei_1590_motion} \\   
    \hline
    Uncertain & 1256? & \autocite{aquinas_1256_two} \\  
    \hline
    Approximate and Uncertain & 1273?\mytilde & \autocite{aquinas_1273_compendium} \\
    \hline 
    \noalign{\bigskip}
    
    \hline 
    \multicolumn{3}{|l|}{\textbf{Eras}}\\
    \hline    
    Before the year zero (``BCE") & -0379\mytilde & \autocite{plato_2004_republic} \\ 
    \hline   
    Not long after the year zero (``CE") & 0125\mytilde & \autocite{epictetus_1916_enchiridion} \\ 
    \hline 
    \noalign{\bigskip}
  \end{tabular} 
  \printbibliography[heading=subbibliography]
\end{refsection}

\begin{refsection}
  \section{Year exceeding four digits}
  
  \subsection{Format}
  
   \begin{quotation}
    'y' may be used at the beginning of the date string to signify that the date is a year, when (and only when) the year exceeds four digits, i.e. for years later than 9999 or earlier than -9999. (\href{http://www.loc.gov/standards/datetime/pre-submission.html#extendedintervall1}{5.2.3, EDTF Extended Interval (L1)})
  \end{quotation}
  
  However, when a year more than four digits is permitted then only the year part is permitted, not other date components (month, day, etc) (From \href{http://www.loc.gov/standards/datetime/pre-submission.html#bnf}{Section 8, EDTF BNF} ...):
  
   \begin{verbatim}
  (* ************************** Level 1 *************************** *)
  level1Expression =  uncertainOrApproxDate 
  | unspecified
  | L1Interval
  | longYearSimple
  | season ...
  
  (* *** Long Year - Simple Form *** *)
  longYearSimple = "y" "-"? positiveDigit digit digit digit digit+ 
  \end{verbatim}
  For example, ...
  
  \begin{verbatim}
  % Legal
  y170000002
  y-170000002
  
  % Illegal
  y170000002-03-22
  y-170000002-03-22
  \end{verbatim}
  
  \subsection{Examples}
  
  \begin{tabular}{|l|l|l|l|}
    \hline
    \textbf{Description} & \textbf{Input} & \textbf{Expected Output} & \textbf{Actual Result}\\
    \hline    
    A long time ago & y-51234 & (Rebels 51235 BCE)  & \autocite{rebels_y-51234_rebel} \\ 
    \hline   
    Far into the future & y52000 & (Seldon 52000)  & \autocite{seldon_y52000_encyclopedia} \\ 
    \hline 
    \noalign{\bigskip}
  \end{tabular}  
  \printbibliography[heading=subbibliography]
\end{refsection}

\end{document}