Custom commands like title and authors

Question

When I use
title{My title}
quthor{Myself}

I can later access these two parameters in the class file by using
@title and @quthor

Is there a way to define my own custom fields, like
cost{This book costs loads}
subtitle{My subtitle}
reviewer{This person revewed the book}

How do I do it?

Burak Karaosmanoğlu · Answer

Yes, you can by using newcommand{tag}{reference} option to define such custom fields as in:
newcommand{cost}{This book costs loads}
newcommand{subtitle}{My subtitle}
newcommand{reviewer}{This person reviewed the book}

For instance, when you use cost, it will replace and print "This book costs loads" on your document. I hope that help.

sikouhjw · Answer

It's not difficult, just look up the definition of title.
cmd input
latexdef -s title

return
% latex.ltx, line 7370:
DeclareRobustCommandtitle[1]{gdef@title{#1}}

So we can write code like this
documentclass{article}
makeatletter
DeclareRobustCommandmycmd[1]{gdef@mycmd{#1}}
newcommand{test}{These are my orders! @mycmd}
makeatother

mycmd{123}

begin{document}
  test
end{document}

Custom commands like title and authors

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