Patternproperties - sgpinkus/json-schema GitHub Wiki
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Validation of an object instance against patternProperties always succeeds. This keyword only influences validation of this instance's children (ie, member values).
The value of this keyword MUST be an object.
Member names of this object MUST be valid ECMA 262 regular expressions (see pattern).
Member values of this object MUST be objects. Furthermore, these objects MUST be valid JSON Schemas.