In org-mode, how to reference the value of a property in another property?

Question

For example, when exporting, the #+title property is taken as the title of the document, which will show as the heading in, for example, a latex pdf. Ideally I would like the #+title value to also be used as the filename as well.

Right now I have to do this:

#+title: My Title
#+export_file_name: My Title

Is there any way I can do something like this:

#+title: My Title
#+export_file_name: (#+title)

Really the goal is to only have to write the title once per document, and have it be used in multiple property values.

I have tried using macros, but they did not work, it will try to export to {{{mymacro}}}.pdf and fail.

Answer 1

Write an interactive Elisp function asking you to input a value when triggered. Once the value is input, the function will then write the following two lines at the beginning of your org document:

#+title: input value
#+export_file_name: input value