indefinite article and acronym

Question

I am using the acronym package, so as to automatically expand acronyms when they are first used. For example, I can simply type \ac{RMS} and LaTeX automatically expands this to "Resource Management System (RMS)" or "RMS".

However, a problem occurs when using indefinite articles. The most common style, Abbreviation verbalised, requires to use "a Resource" and "an RMS". Is there an easy way to deal with this in LaTeX?

Otherwise, have you seen articles where they use Word verbalised style?

Answer 1

You can use the test that \ac uses to test for first use but make it make other texts, an and a here: (Please in future provide a working example, it would have made it much easier to answer).

\documentclass{article}

\usepackage{acronym}

\newacro{RMS}[RMS]{Resource Management System}

\makeatletter
\def\acrousedTF#1{%
\expandafter\ifx\csname ac@#1\endcsname\AC@used%
\expandafter\@firstoftwo
\else
\expandafter\@secondoftwo
\fi}
\makeatother

\begin{document}

zzzz \acrousedTF{RMS}{an}{a} \ac{RMS}  zzzz \acrousedTF{RMS}{an}{a}  \ac{RMS}  
\end{document}