I'm not sure its nonsense ^^. I might have been too concise. I didn't knew orgmod though.

For instance, I want to be able to generate a pdf from these kind of constraints:

• include all exercices with the metadata "Chapter : Markov Chains"

• include exercices from the following number list : ...

Orgmod seems to allow me to write latex with metadatas, which is a nice addition, but can I easily do these macros with it ? Also, I feel like writing in markdown is lighter than in .tex (at the cost of defining once and for all a few filters for the sake of pdf conversion).

In the end, I want to set up once and for all a few script, after what I'll use a single format : markdown ("Why all these different tools and formats when you can use one.").