@Sindizzy: Glad you’re enjoying Natural Earth. While we do not offer XML metadata, each theme has a data description page on this website. In the main download list, there is an “About | Issues | Version History ยป” link as part of each theme. Clicking on that would bring up a page like: https://www.naturalearthdata.com/downloads/10m-physical-vectors/10m-coastline/. You get what you pay for with Natural Earth. Metadata is a slave-level job (really) for someone to produce on top of basic features you’re already getting for free. The release notes shown on the blog each dot increase detail major changes between versions.