\newcommand\ltext[1]{\mbox{#1}}
\newcommand\term[1]{\emph{\mbox{#1}}}
\newcommand\acronym[1]{\ltext{#1}}
\newcommand\classname[1]{\mbox{\tt #1}}
\newcommand\propertykey[1]{\mbox{\tt #1}}
\newcommand\propertyvalue[1]{\mbox{\tt #1}}
\newcommand\methodname[1]{\mbox{\tt #1}}
\newcommand\filename[1]{\mbox{\sl #1}}
\newcommand\packagename[1]{\mbox{\tt\sl #1}}

\newcommand\xcallout[1]{\hfill\textcircled{#1}}
\newcommand\xkeyword[1]{{\bf #1}}

\newcounter{calloutindex}
\newenvironment{callout}%
{\begin{itemize}\setcounter{calloutindex}{1}}%
{\end{itemize}}
\newcommand\coitem{\item[\textcircled{\arabic{calloutindex}}%
\addtocounter{calloutindex}{1}]}

\newenvironment{example}%
{\par\vskip 6pt\tt\small\obeylines\obeyspaces}%
{\vskip 6pt}

