I am a huge JSON fan, but I have still managed to find a few cases where I can make use of XML - the mixed-mode situations the author describes. To generalize

I am a huge JSON fan, but I have still managed to find a few cases where I can make use of XML - the mixed-mode situations the author describes. To generalize my viewpoint: XML is a good way to mix data and data processing, or mash up multiple DSLs in polyglot fashion. When stream-parsed, one can imagine great use-cases of XML, where an early node adds context, references and functionality for other data later in the document. But it sucks for plain old standalone-structured data, which is the kind of data we usually like to _store_.