Is something like Steganography[0] what you had in mind? (I'll assume your intent is less about hiding data, and more about inserting metadata "inline" for con

Is something like Steganography[0] what you had in mind? (I'll assume your intent is less about hiding data, and more about inserting metadata "inline" for convenience, right?) If so, that sounds pretty handy! [0] = https://en.wikipedia.org/wiki/Steganography https://en.wikipedia.org/wiki/Steganography