我正在使用biblatex基于trad-standard风格：
\RequireBibliographyStyle{trad-standard}
urldate在我的自定义样式中，我重新定义了一些外观，如粗体文本等，但现在如果给出了 URL，我想将其添加到输出中。
例如，我有一个网站作为参考。Mendeley 将资源导出为 ，@misc这似乎是正确的，但访问日期（保存为urldate）没有显示。我现在搜索了 bibstyle 的代码trad-standard，但没有找到密钥，因此没有输出是很合乎逻辑的。如果给出了 URL 和，urldate我如何添加始终显示 的功能，无论我处于哪种条目类型？urldateurldate
我的猜测是更新doi+eprint+url宏，因为它负责输出 URL。因此，如果我可以将 附加urldate到输出，它应该可以满足我的要求。问题是，我不知道如何将 附加urldate到宏。
这是我的自定义.bbx文件：
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% This is a custom bibliography style based on the trad-abbrv style
% by Marco Daniel (2012--2015) and Moritz Wemheuer (2016--).
%
% This package is released under the terms of the
% LaTeX Project Public License v1.3c or later
% See http://www.latex-project.org/lppl.txt
%
% Copyright (c) 2012 -- 2015 Marco Daniel
% 2016 -- Moritz Wemheuer
%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %%%%%%%%%%%%%
% Declare Style
% %%%%%%%%%%%%%
\ProvidesFile{custom-abbrv.bbx}[2017/10/18 v1.0.0 Custom abbrv Bibliography Style]
% %%%%%%%%%%%%%%
% Require Styles
% %%%%%%%%%%%%%%
\RequireBibliographyStyle{trad-standard}
% %%%%%%%%%%%%%
% Basic Options
% %%%%%%%%%%%%%
\ExecuteBibliographyOptions{
abbreviate = false,
arxiv = false
autolang = hyphen,
backref = false,
dateabbrev = true,
eprint = false,
hyperref = true,
labelnumber = true,
maxnames = 3,
minnames = 3,
sorting = none,
}
% %%%%%%%%%%%%%%%%%%%
% trad-abbrv Settings
% %%%%%%%%%%%%%%%%%%%
\@ifpackagelater{biblatex}{2016/03/01}{%
\@ifpackagelater{biblatex}{2016/05/14}{%
\DeclareNameFormat{abbrv}{%
\usebibmacro{name:given-family}%
{\namepartfamily}%
{\namepartgiveni}%
{\namepartprefixi}%
{\namepartsuffixi}%
\usebibmacro{name:andothers}%
}%
}{%
\DeclareNameFormat{abbrv}{%
\nameparts{#1}%
\usebibmacro{name:given-family}%
{\namepartfamily}%
{\namepartgiveni}%
{\namepartprefixi}%
{\namepartsuffixi}%
\usebibmacro{name:andothers}%
}%
}%
}{%
\DeclareNameFormat{abbrv}{%
\usebibmacro{name:first-last}{#1}{#4}{#6}{#8}%
\usebibmacro{name:andothers}%
}%
}%
\DeclareNameAlias{default}{abbrv}
\DeclareFieldFormat{bibentrysetcount}{\mkbibparens{\mknumalph{#1}}}
\DeclareFieldFormat{labelnumberwidth}{\mkbibbrackets{#1}}
\DeclareFieldFormat{shorthandwidth}{\mkbibbrackets{#1}}
\@ifpackagelater{biblatex}{2016/05/14}{%
\defbibenvironment{bibliography}%
{%
\list{%
\printtext[labelnumberwidth]{%
\printfield{labelprefix}%
\printfield{labelnumber}%
}%
}{%
\setlength{\labelwidth}{\labelnumberwidth}%
\setlength{\leftmargin}{\labelwidth}%
\setlength{\labelsep}{\biblabelsep}%
\addtolength{\leftmargin}{\labelsep}%
\setlength{\itemsep}{\bibitemsep}%
\setlength{\parsep}{\bibparsep}%
}%
\renewcommand*{\makelabel}[1]{\hss##1}%
}
{\endlist}
{\item}%
}{%
\defbibenvironment{bibliography}%
{%
\list{%
\printtext[labelnumberwidth]{%
\printfield{prefixnumber}%
\printfield{labelnumber}%
}%
}{%
\setlength{\labelwidth}{\labelnumberwidth}%
\setlength{\leftmargin}{\labelwidth}%
\setlength{\labelsep}{\biblabelsep}%
\addtolength{\leftmargin}{\labelsep}%
\setlength{\itemsep}{\bibitemsep}%
\setlength{\parsep}{\bibparsep}%
}%
\renewcommand*{\makelabel}[1]{\hss##1}%
}%
{\endlist}%
{\item}%
}
\defbibenvironment{shorthands}%
{%
\list{%
\printfield[shorthandwidth]{shorthand}%
}{%
\setlength{\labelwidth}{\shorthandwidth}%
\setlength{\leftmargin}{\labelwidth}%
\setlength{\labelsep}{\biblabelsep}%
\addtolength{\leftmargin}{\labelsep}%
\setlength{\itemsep}{\bibitemsep}%
\setlength{\parsep}{\bibparsep}%
\renewcommand*{\makelabel}[1]{\hss##1}%
}%
}%
{\endlist}%
{\item}%
\DeclareBibliographyDriver{set}%
{%
\entryset%
{%
\ifbool{bbx:subentry}%
{%
\printfield[bibentrysetcount]{entrysetcount}%
\setunit*{\addnbspace}%
}%
{}%
}%
{}%
\newunit\newblock%
\usebibmacro{setpageref}%
\finentry%
}
% %%%%%%%%%%%%%%%%%
% Appearance Styles
% %%%%%%%%%%%%%%%%%
% Name
\renewcommand{\labelnamepunct}{\addcolon\space}
% Title
\DeclareFieldFormat*{title}{\enquote{#1}\isdot}
\DeclareFieldFormat{journaltitle}{\mkbibemph{#1},}
% Volume
\DeclareFieldFormat[article]{volume}{#1}
% Number
\DeclareFieldFormat*{number}{\mkbibparens{#1}}
% Pages
\DeclareFieldFormat*{pages}{\space#1\space}
\renewcommand*{\bibpagespunct}{\addspace}
% Year
\DeclareFieldFormat{date}{\textbf{#1}}
% URL
\DeclareFieldFormat{url}{URL:\space\url{#1}}
% ISSN / ISBN
\DeclareFieldFormat{issn}{ISSN:\space\url{#1}}
\DeclareFieldFormat{isbn}{ISBN:\space\url{#1}}
% DOI
\DeclareFieldFormat{doi}{%
DOI\addcolon\space
\ifhyperref
{\href{http://dx.doi.org/#1}{\nolinkurl{#1}}}
{\nolinkurl{#1}}%
}
% Item Separation
\setlength\bibitemsep{.5\baselineskip}
% Alignment
\AtBeginBibliography{\raggedright}
% %%%%%%%%%%%%%%%%%%%%%%%
% Changes in the position
% %%%%%%%%%%%%%%%%%%%%%%%
% Change the position of the year to be in front of the volume
\renewbibmacro*{journal+issuetitle}{%
\usebibmacro{journal}%
\usebibmacro{date}% Added the date, right after the journal
\newcommaunit*%
\iffieldundef{series}
{}
{%
\newunit
\printfield{series}%
\setunit{\addcomma\space}%
}%
\usebibmacro{volume+number+pages+eid}%
\newcommaunit
% \setunit{\addspace}%
\usebibmacro{issue+date-parens}%
\setunit*{\addcolon\space}%
\usebibmacro{issue}%
\newunit%
}
% Remove the date after the volume
\renewbibmacro*{issue+date-parens}{%
\iffieldundef{issue}%
{%
% \usebibmacro{date}
}%
{%
\printfield{issue}%
\newcommaunit*%
% \usebibmacro{date}
}%
\newunit%
}
\endinput
答案1
正如评论中所说，问题实际上是urldateMendeley 导出的格式错误的字段。所有日期字段都必须以格式 (ISO 8601/EDTF)biblatex编写，这不是可接受的输入，并会生成警告：YYYY-MM-DDDD.MM.YYYY
Invalid format '30.04.2018' of date field 'urldate' - ignoring
您一定要就此事联系 Mendeley 开发人员。
与此同时，这里有一个 Biber 源映射的修复
\documentclass[british]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{babel}
\usepackage{csquotes}
\usepackage[style=authoryear, backend=biber]{biblatex}
\begin{filecontents}{\jobname.bib}
@misc{appleby,
author = {Humphrey Appleby},
title = {On the Importance of the Civil Service},
date = {1980},
url = {http://example.com/~sirhumphrey/cc.pdf},
urldate = {30.04.2018},
}
\end{filecontents}
\addbibresource{\jobname.bib}
\addbibresource{biblatex-examples.bib}
\DeclareSourcemap{
\maps[datatype=bibtex]{
\map{
\step[fieldsource=urldate, match=\regexp{\A(\d{2}).(\d{2}).(\d{4})\Z}, replace={$3-$2-$1}]
}
}
}
\begin{document}
\cite{sigfridsson,appleby}
\printbibliography
\end{document}
但不要只是使用它：向 Mendeley 的人投诉！