[1]

JSON in Oracle Database ( (2016-10-21 18:45:42 +09:00)) https://docs.oracle.com/database/121/ADXDB/json.htm#ADXDB6260

The Oracle default syntax for JSON is lax. In particular: it reflects the JavaScript syntax for object fields; the Boolean and null values are not case-sensitive; and it is more permissive with respect to numerals, whitespace, and escaping of Unicode characters.