Thanks Christian,

I am currently using index to create the closest thing I can to what I
want.  It looks like the below.  The big problem is that there are a max of
3 levels, the top level which is the first character of the second.

Could I do any better than this without writing something new?

Greg

C
    computing-methodologies
        adversarial plan recognition

D
    document-management-and-text-processing
         bibliographies using org-mode

On Thu, Oct 22, 2015 at 9:40 PM, Christian Moe <mail@christianmoe.com>
wrote:

>
> For a listing by a hierarchy of subject, I think the index system does
> what you want and is the only approach that does what you want out of
> the box. But if I understand correctly, you already have an index, and
> want this to be a separate listing?
>
> Yours,
> Christian
>
>
> Greg O'Keefe writes:
>
> > Hi,
> >
> > I keep a directory of notes as .org files, and use publish to generate
> > .html from them.  This produces sitemap.html - a table of the #+TITLEs,
> and
> > theindex.html built from #+INDEX entries I have added.
> >
> > I would like a third summary .html page which lists the notes organised
> in
> > a tree by subject classification, where the subject classification is
> > something like the ACM Computing Subject Classification or the Dewey
> > Decimal system, or some cut-down version of these.
> >
> > The result would look a bit like this, where the _underlined_ items are
> > links to notes.
> >
> > Information Technology
> >     Software and its Engineering
> >         Modelling Languages
> >             _Dynamic Logic for UML Sequence Diagrams_
> >     Computing Methodologies
> >         Knowledge Representation
> >             _Translating ACL to FOL_
> >
> > Reading the  manual, it looks like I could use TAGS to give the notes
> > subjects, and use these to do searches over the whole project in emacs.
> > This, and the way theindex.html is produced by including a simple looking
> > theindex.inc text file makes me think that the solution may not be very
> > hard. However, my lisp is very weak :-(
> >
> > Any suggestions or code most welcome!
> >
> > Cheers,
> >
> > Greg
>
>