As promised, my chapter from O’Reilly’s Beautiful Code book is now online under a free license:

Subversion’s Delta Editor: Interface as Ontology

Of course, no chapter on programming would be complete without tree diagrams…

Since all the authors’ fees are being donated to Amnesty International, an unexpected result of writing a chapter for this book is that I feel I can finally use those return-address labels Amnesty International is always sending me in their fundraising letters. I hadn’t donated before — they’re a good cause, but there are a lot of good causes and I’ve been sending my money elsewhere. However, now that O’Reilly is effectively donating in my name, I don’t have to print my own address labels if I’m short on time: I can, without guilt, use the rather nice ones that have been arriving for free in the mail for years.