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I am trying to change how BibLaTeX changes the title of certain entries. I want to do this by modifying the bibmacro for "title". However, I cannot find its default definition anywhere. It is used in standard.bbx for example but there does not seem to be any definition. Where can I find the default for this macro?

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    Many basic bibmacros are defined in biblatex.def. The bibliography drivers and some 'higher-level' bibmacros are defined in standard.bbx. The <style>.bbx files contain some style specific bibliography modifications. Citation style definitions can be found in <style>.cbx. Custom styles usually consist of <style>.bbx and <style>.cbx as well, but may sometimes rely on additional files. – moewe Aug 16 '20 at 10:49
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    Related: https://tex.stackexchange.com/q/542043/35864, https://tex.stackexchange.com/q/456615/35864, https://tex.stackexchange.com/q/554623/35864, https://tex.stackexchange.com/q/434768/35864, https://tex.stackexchange.com/q/12806/35864 – moewe Aug 16 '20 at 10:51

1 Answers1

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Lines 2785-2797 of biblatex.def (in v3.14):

\newbibmacro*{title}{%
  \ifboolexpr{
    test {\iffieldundef{title}}
    and
    test {\iffieldundef{subtitle}}
  }
    {}
    {\printtext[title]{%
       \printfield[titlecase]{title}%
       \setunit{\subtitlepunct}%
       \printfield[titlecase]{subtitle}}%
     \newunit}%
  \printfield{titleaddon}}
moewe
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Bernard
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