Lenses

[Serge Wroclawski]

A couple of months ago I talked about the idea of having a common file
format that described both the input and output of a structured data
file.

The idea was clear in my mind but I didn't have the vocabulary to
describe it or an implementation of the idea.

The word I wanted was "lens", as described in this project:

http://alliance.seas.upenn.edu/~harmony/

- Serge