While there are (commonly used) alternative serialization formats, RDF is married to XML data model, as all core datatypes of RDF are defined in terms of XSD (X

While there are (commonly used) alternative serialization formats, RDF is married to XML data model, as all core datatypes of RDF are defined in terms of XSD (XML Schema Definition) datatypes and very closely mimics it's data model. If you want to have an RDF that is independent of that (e.g. based on Apache Arrow so that it's compatible with modern big data tooling) you might as well start from scratch.