Make the first letter of each word uppercase in sentence

[hushidong]

Biblatex provides \MakeCapital and \MakeSentenceCase which can make the first letter uppercase.

But how to make the first letter of each word uppercase in sentence ?

I find \capitalisewords provided by pkg mfirstuc , it works in document , like:

\documentclass[twocolumn]{article}
\usepackage{etoolbox}
\usepackage[backend=biber,style=numeric]{biblatex}%
\usepackage{mfirstuc}
\usepackage{xstring}
\addbibresource[location=local]{egbib.bib}

\begin{document}
\capitalisewords{Electronic resources : selection and bibliographic control}

\mkbibemph{\capitalisewords{Electronic resources : selection and bibliographic control}}

\capitalisewords{\mkbibemph{electronic resources : selection and bibliographic control}}

\strtowdudfa{Electronic resources : selection and bibliographic control}

\strtowdudfa{\mkbibemph{Electronic resources : selection and bibliographic control}}

\mkbibemph{\strtowdudfa{Electronic resources : selection and bibliographic control}}
\end{document} 

but can not work when used in \DeclareFieldFormat in a bbx file, like:

\DeclareFieldFormat{booktitle}{\capitalisewords{#1}}%

and I write a simple macro to implement the same goal, but it has the same problem, like:

\newrobustcmd{\strtowdudfa}[1]{%
	\edef\coefone{#1 $}
	%\meaning\coefone
	\expandafter\stowparsea@udf\coefone%
}

\def\stowparsea@udf#1 #2${%
	\def\coefone{#1}\def\coeftwo{#2}%
	%\par\meaning\coefone \meaning\coeftwo
	\ifx\coeftwo\@empty%
		\MakeSentenceCase{#1 }%
	\else%
		\MakeSentenceCase{#1 }%
		\def\coeftwos{#2$}%
		\expandafter\stowparsea@udf\coeftwos%
	\fi%
	}

when used in \DeclareFieldFormat, the error info is:

! Missing \endcsname inserted.
<to be read again>
			\protect
1.41 \printbibliography[heading=bibliography]

is there any way to solve this problem ?
or is there a new command added in biblatex can make the first letter uppercase of each word in sentence ?

[moewew]

Use

\DeclareFieldFormat{titlecase}{\capitalisewords{#1}}

titlecase is applied to the contents of the field directly. The booktitle format is actually used as

\printtext[booktitle]{%
  \printfield[titlecase]{booktitle}%
  \setunit{\subtitlepunct}%
  \printfield[titlecase]{booksubtitle}}%

and so will run into expansion troubles.

[hushidong]

Thank you !

As your illustration, I define a new field format for booktitle, and both \capitalisewords and \strtowdudfa works. like:

\DeclareFieldFormat{bkttlcase}{\strtowdudfa{#1}}%\capitalisewords\strtowdudfa
{\printtext[booktitle]{%
	   \printfield[bkttlcase]{booktitle}%
	   \setunit{\subtitlepunct}%
	   \printfield[titlecase]{booksubtitle}}%
	 \newunit}%

Thanks again!

[moewew]

BTW: The reason that biblatex does not provide a 'capitalise all words' macro is not only that it has been implemented elsewhere and is quite complicated to pull off correctly, but also that is is unusual to capitalise all words in a title. Often the choice is between sentence case (capitalise only the first word and proper nouns) and title case (most words are capitalised, but articles, short prepositions, conjunctions, and other 'small words' remain lower cased, Wikipedia). A title casing macro is much, much harder to implement in TeX and so the normal approach since BibTeX has been to give the title in title case in the .bib file, protect proper nouns and other parts of the title that must always be capitalised from case change and let the style apply sentence casing automatically.

[hushidong]

thanks

learned a lot in your reply,especially the knowledge about sentence case and title case.

according to my test, the title case can be implemented by the combination of \capitalisewords and \MFUnocap provided by mfirstuc.

• first, enumerate all the articles,prepositions,conjunctions with \MFUnocap
• then, use \capitalisewords to uppercase the first letter of the sentence, and other first letters of words in sentence which are not defined in \MFUnocap

this may be an alternative to the handwritting in .bib source file.