Hi Mark,
OK, it seems that I have really overstated this change. You are of
course right that your header for a document type can be very long,
that that defining it in org-export-latex-classes is a viable option
(other being to put this stuff into a separate file).
So let me restate what I am trying to say in this thread.
------------------------------------------------------------------------------
Org-mode contains now a new variable
`org-export-latex-default-packages-alist'
which contains all the LaTeX packages it needs to use for basic Org-
mode
functionality. The corresponding \usepackage statements used to be
part
of the header definitions in org-export-latex-classes, and they had
to
be repeated for each document class. This is wasteful, error prone,
and
hard to maintain.
Therefore, these packages are now collected in the new variable,
and they will be spliced into the header.
If you have customized the variable org-export-latex-classes, you
need to
remove the following lines from each class definition:
\usepackage[AUTO]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{longtable}
\usepackage{float}
\usepackage{wrapfig}
\usepackage{soul}
\usepackage{latexsym}
\usepackage{amssymb}
\usepackage{hyperref}
If you have other packages you always want to use in all
classes, you can add them to another variable,
`org-export-latex-packages-alist'.
------------------------------------------------------------------------------
I think this makes more sense, thank you for making me clarify this.
- Carsten