{\LaTeX\ profiles as objects in the ``category'' of \programrlap{markup~languages}} {William~Hammond} {{The mathematical notion of ``category'' in the context of markup languages raises the idea of widespread use of reliable automatic translations between markup languages. } \par{\LaTeX{} profiles, which are dialects of \LaTeX{} with a fixed command vocabulary where all macro expansions must be effective in that vocabulary, are suitable domains for defining translations to other profiles and, where sensible, to other markup languages. } \par{The construction of reliable translators from several journal-neutral \LaTeX{} profiles to many journal-specific \LaTeX{} profiles would eliminate the need for technical editing in the production flow for academic journals. } %REFERENCES \def\textsc{\acro}\frenchspacing \item{[1]} William F. Hammond, ``\textsc{GELLMU}: A Bridge for Authors from \LaTeX{} to \textsc{XML}'', \emph{TUGboat}, vol. 22 (2001), no. 3, pp. 204--207; also available online at \url{http://www.tug.org/TUGboat/Contents/contents22-3.html}. \item{[2]} William F. Hammond, ``Dual presentation with math from one source using \textsc{GELLMU}'', \emph{TUGboat}, vol. 28 (2007), no. 3, pp. 306--311; also available online at \url{http://www.tug.org/TUGboat/Contents/contents28-3.html}. A video recording of the presentation at \textsc{TUG~2007}, July~2007, in San~Diego is available at \url{http://www.river-valley.tv/conferences/tex/tug2007/}. \item{[3]} William F. Hammond, ``Multipurpose \LaTeX{}-like markup for math'', talk given in the \acro{AMS-MAA} Special Session \emph{Putting Math on the Web the Correct Way} at the Joint Mathematics Meetings in San Diego in January~2008. This has not been published, but \HTML\ slides that link to many examples are available on the web at \url{http://math.albany.edu/math/pers/hammond/Presen/JMM08/Putting/}. }