Invalid JSON is accepted by validator. about json-schema-validator

[fge]

Erm, no, it is valid!

Your schema says, for address:

"address" : {
"title": "Street name and number",
"type" : "string"
}

Your address is a string.

If you want to make one or more properties required, add "required": true to the schema of these properties.

[fge]

BTW, which version do you use? and which version of JSON Schema, too? The optional keyword no longer exists.

[fge]

Closing. Referring to an obsolete schema version.

However, if you deem it important to support draft v2, I can manage that.