Rez for PNGs?

There's a little-known app called SNG (scriptable network graphics) that provides a way to write a PNG file as a text file. The source code comes with an example file:

Looks a lot like Rez to me. And they do perform somewhat similar functions (Rez encodes to a resource file; sng encodes to PNG). Thus my conclusion: it's Rez for PNGs.

Technorati tags: PNG.