This reminds me a bit of the DESCRIBE command in 4DOS ca. 35 years ago [0]. It was only a single text entry per file, but supported by many tools [1], including

This reminds me a bit of the DESCRIBE command in 4DOS ca. 35 years ago [0]. It was only a single text entry per file, but supported by many tools [1], including file managers. There was a proposal to extend the format to XMP properties [2]. [0] https://archive.org/details/bitsavers_jpsoftware_65101374/page/n206/mode/1up https://archive.org/details/bitsavers_jpsoftware_65101374/pa... [1] https://4dos.info/4tools.htm#02 https://4dos.info/4tools.htm#02 [2] http://www.optimasc.com/products/fileid/4dos-descext.pdf http://www.optimasc.com/products/fileid/4dos-descext.pdf