JSON Schema validation using tv4 or any other validator

Question

I have a some kind JSON structure within an array. The requirement is:

1. All the JSON object within the array can be optional.
2. Each JSON can have its own set of properties and can be complex and nested.
3. Each JSON object will have a set of mandatory attributes.

How to create a schema for such JSON. Will uisng anyOf or definitions will be helpful?

Updated: I have an array of JSON objects, where each object can have different attributes. The only attribute that will be common is 'type' with valid values as: electronics or furniture or finance. So my question is how to derive a schema?

Example

{
 "list": [
  {
   "type": "electronics"
  },
  {
   "type": "furniture"
  },
  {
   "accessRights": "readOnly",
   "rules": ['print','copy'],
   "type": "finance"
  }
}

Solution

{
"properties": {
    "list": {
        "type": "array",
        "items": {
            "type": "object",
            "required": ["type"],
            "properties": {
                "type": {
                    "type": "string",
                    "enum": ["electronics", "furniture", "finance"]
                }
            },
            "anyOf": [{
                "properties": {
                    "type": {
                        "enum": ["electronics"]
                    }
                }
            }, {
                "properties": {
                    "type": {
                        "enum": ["furniture"]
                    }
                }
            }, {
                "properties": {
                    "type": {
                        "enum": ["finance"]
                    },
                    "accessRights": {
                        "type": "string"
                    },
                    "rules": {
                        "type": "array"
                    }
                }
            }]
        }
    }
 }
}