The Python plaintext library for people who've tried everything else
*keyname::value
**keyname::value
**keyname::value
Immediately preceding a metadata key, the single and double asterisk propagate the metadata entry to child nodes and all descendant nodes, respectively. Note they do remove the metadata from the containing node. To assign the metadata entry containing node as well, precede them by the plus sign (+).ex
See Metadata for more information.