The other day I was looking for an XML schema to describe the various comic books in my collection.
ComicMeta.Org hosts Comic Book Ontology, “an OWL ontology and RDF metadata vocabulary for describing comic books and comic book collections.”
Comic Book Ontology was created by Sean Petiya, who did his 2014 Master’s thesis on Building a Semantic Web of Comics: Publishing Linked Data in HTML/RDFa Using a Comic Book Ontology and Metadata Application Profiles.
Petiya also has a GitHub repository for Comic Book Ontology.