He also says that JSON is just a data interchange format where XML is a broader set of tools, one of which is metadata. XML supports metadata, JSON is just attributes, so there is a challenge to represent metadata in JSON. Also, there is no support for namespaces in JSON. Finally, binary coded files, like graphics files or documents, fit well into XML. JSON, not so much.
"There are a lot of standards around data use cases in XML that don’t exist JSON. Data interchange formats for records like EDI, which migrated to XML, have standard formats. Those don’t exist for JSON," he says.
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