You might find something useful by poking around the literature around "digital libraries". https://en.wikipedia.org/wiki/Digital_library https://en.wikipedia.

You might find something useful by poking around the literature around "digital libraries". https://en.wikipedia.org/wiki/Digital_library https://en.wikipedia.org/wiki/Digital_library There's also some stuff that could be adapted to the purpose you're talking about, from the Semantic Web space. See the following example of using VoID with DBPedia categories, for one illustration of this idea. https://www.w3.org/TR/void/#subject https://www.w3.org/TR/void/#subject And with that in mind, since somebody brought up the LOC, you might also find this of interest: http://www.loc.gov/standards/mods/modsrdf-primer.html http://www.loc.gov/standards/mods/modsrdf-primer.html http://www.loc.gov/standards/mods/ http://www.loc.gov/standards/mods/ https://www.loc.gov/librarians/standards https://www.loc.gov/librarians/standards And from the "see also" category: https://www.dublincore.org/ https://www.dublincore.org/