{name, "fraction"}.
{jsx, [start_array,start_array,
{float,"2.0"},
end_array,
start_object,
{key,"key"},
{float,"2.0e7"},
{key,"another key"},
end_object,start_object,
end_object,
{float,"4.2"},
end_array,end_json]}.
{json, "fraction.json"}.