While I still think `org-accumulated-properties-alist' is the most powerful solution -- as it is the only solution which allows a subtree property block to extend rather than overwrite a file-wide property. I've been thinking a little bit more about these issues and I'm returning to a previous suggestion...
Do we still think that using #+KEYWORD+: lines is an ugly way to specify multi-line values for keywords. I think this has the advantages of simplicity, intuitiveness (its use is obvious once you see it), and generality (i.e., this could be used to allow multi-line tblfm lines). Just another thought -- Eric -- Eric Schulte http://cs.unm.edu/~eschulte/
