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日期格式（在 bib 条目中）/bibelatex biber

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日期格式（在 bib 条目中）/bibelatex biber

我正在使用 biber 和 biblatex，我想打印 2013 年之前的所有论文。当我使用

year = {2010}

.bib 文件中的条目，每件事都很好做。但是，如果我使用

date = {2010-11-25}

而不是年份，我的输入被忽略了。我尊重日期格式，对吧？那么哪里出了问题？这是 MWE。

\documentclass{article}
\usepackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@THESIS{a,
  AUTHOR =  {Myself},
  TITLE = {Me, myself and I},
  Institution = {My University},
  type = {Ph.D. thesis},
  year = {2010} 

} %  date = {2010-11-25}
\end{filecontents*}
\usepackage[backend=biber,defernumbers=true,sorting=ydnt]{biblatex}
\addbibresource{\jobname.bib}
\DeclareSourcemap{
  \maps[datatype=bibtex]{
         \map[overwrite=true]{
            \step[fieldsource=year,  match=\regexp{199([7-9])|200([0-9])|201([0-2])},final]
            \step[fieldset=keywords, fieldvalue={,}, append]
        \step[fieldset=keywords, fieldvalue={before2013}, append]
}}}

\begin{document}
Hello world.
    \nocite{*}
    \printbibliography[type=thesis,keyword=before2013,title=Thesis,resetnumbers=true]
\end{document}

答案1

year您可以将字段与biblatex文档中的字段进行比较，而不是使用 Biber 的源映射。（year无论您使用过year还是使用过，我们都可以在这里使用date，因为date字段在写入时总是被拆分成其组件.bbl。）

我们定义一个 bibcheck

\defbibcheck{before2013}{%
  \iffieldint{year}
    {\ifnumless{\thefield{year}}{2013}
       {}
       {\skipentry}}
    {\skipentry}}

并使用该检查代替关键字

\printbibliography[type=thesis,check=before2013,title=Thesis,resetnumbers=true]

答案2

您\maps仅设置keyword=before2013了year1997 年至 2012 年，而不是date1997-01-01 年至 2012-12-31 年。仅当 时才会打印索引。因此，如果使用而不是keyword=before2013，则不会打印条目。dateyear

您可以添加类似的地图，就像date您有的一样year：

\documentclass{article}
\usepackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@THESIS{a,
  AUTHOR =  {Myself},
  TITLE = {Me, myself and I},
  Institution = {My University},
  type = {Ph.D. thesis},
  year = {2010} 
}
@THESIS{b,
  AUTHOR =  {Another},
  TITLE = {Another, one and nobody},
  Institution = {My University},
  type = {Ph.D. thesis},
  date = {2010-11-25} 
}
@THESIS{c,
  AUTHOR= {Never},
  TITLE = {I'm to late},
  Institution = {My University},
  type = {Ph.D. thesis},
  date = {2017-01-01}
}
\end{filecontents*}
\usepackage[backend=biber,defernumbers=true,sorting=ydnt]{biblatex}
\addbibresource{\jobname.bib}
\DeclareSourcemap{
  \maps[datatype=bibtex]{
    \map[overwrite=true]{
      \step[fieldsource=year,  match=\regexp{199([7-9])|200([0-9])|201([0-2])},final]
      \step[fieldset=keywords, fieldvalue={,}, append]
      \step[fieldset=keywords, fieldvalue={before2013}, append]
    }
    \map[overwrite=true]{
      \step[fieldsource=date,  match=\regexp{199([7-9])|200([0-9])|201([0-2])},final]
      \step[fieldset=keywords, fieldvalue={,}, append]
      \step[fieldset=keywords, fieldvalue={before2013}, append]
    }
  }
}

\begin{document}
Hello world.
    \nocite{*}
    \printbibliography[type=thesis,keyword=before2013,title=Thesis,resetnumbers=true]
\end{document}

在此处输入图片描述

另一个解决方案是使用检查，因为当日期已经拆分时检查就完成了：

\documentclass{article}
\usepackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@THESIS{a,
  AUTHOR =  {Myself},
  TITLE = {Me, myself and I},
  Institution = {My University},
  type = {Ph.D. thesis},
  year = {2010} 
}
@THESIS{b,
  AUTHOR =  {Another},
  TITLE = {Another, one and nobody},
  Institution = {My University},
  type = {Ph.D. thesis},
  date = {2010-11-25} 
}
@THESIS{c,
  AUTHOR= {Never},
  TITLE = {I'm to late},
  Institution = {My University},
  type = {Ph.D. thesis},
  date = {2017-01-01}
}
\end{filecontents*}
\usepackage[backend=biber,defernumbers=true,sorting=ydnt]{biblatex}
\addbibresource{\jobname.bib}
\defbibcheck{before2013}{%
  \iffieldint{year}% If an interger field year exists
  {
    \ifnumless{\thefield{year}}{2013}% and the field value is less than 2013
    {}% do nothing
    {\skipentry}% otherwise skip the entry
  }
  {\skipentry}% skip the entrie also if there isn't an integer field year
}

\begin{document}
Hello world.
    \nocite{*}
    \printbibliography[type=thesis,check=before2013,title=Thesis,resetnumbers=true]
\end{document}

结果是一样的。

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