I have long thought that we should extend the plain text format to allow putting provenance metadata into substrings in the file. This is that, but a different

I have long thought that we should extend the plain text format to allow putting provenance metadata into substrings in the file. This is that, but a different implementation. Plain text is like two conductor cables; it’s so useful and cost effective but the moment you add a single abstraction layer above it (a data pin) you can do so much more cool stuff.