JSON has no notion of object "type". So if you have a list of things, whose processing is determined by their type, you may need to parse the entire object bef

JSON has no notion of object "type". So if you have a list of things, whose processing is determined by their type, you may need to parse the entire object before finding the key/value pair that distinguishes its type. Because XML puts the "type" of an object syntactically first, it supports this use case.