org-create-formula--latex-header does not respect latex_header in included file

[Bing Sun <subi.the.dream.walker@gmail.com>]

hello list,

I have a separate org file for a rather complicated latex preamble and
then include it when needed. It works well for latex exporting but it
appears that org-create-formula--latex-header just ignores the
latex_header properties in the included org file when previewing latex
fragments.

Is this intended or am I missing anything?

BTW, I find it painful to maintain the latex preamble as the
latex_header properties, say
#+LATEX_HEADER: \newcommand{\mathd}{\mathrm{d}}
#+LATEX_HEADER: \newcommand{\mathbf}[1]{\ensuremath{\boldsymbol{#1}}}
#+LATEX_HEADER: \newcommand{\op}[1]{\ensuremath{\operatorname{#1}}}

I'd like something like this,
#+BEGIN_SRC latex :preamble
 \newcommand{\mathd}{\mathrm{d}}
 \newcommand{\mathbf}[1]{\ensuremath{\boldsymbol{#1}}}
 \newcommand{\op}[1]{\ensuremath{\operatorname{#1}}}
#+END_SRC

Does that make any sense?

Regards.