[O] external/central ``macro'' definitions (for instance link abbrev's)?

[Martin Steffen]

Hi,

I like to achieve the following. I do a org-document which I separate
into different files (one per chapter or similar). They are all included 
into some "main.org".

In that setup, I'd like to use some centrally defined links, like


#+LINK: toollib  ../../src/lib

or similar, as an abbrev in hyperlinks like

[[toollib:somefile][somefile]] 



Now, the #+LINK mechanism works fine as such. But I want that it works 
for all used *.org files that constituted the overall document /without/
repeating the definition. Something like

#+INCLUDE "definitions.org" 

at the beginning of each file, so that if something changes, I need to
adapt only "definitions.org", not all files making use of that shared links.


Is there a way to achieve that? Thanks, Martin