objects.json

{
    "$schema": "https://json-schema.org/schema",
    "$id": "https://www.github.com/",

    "definitions": {
        "#bottle": {
            "$id": "#bottle",
            "type" : "object",
            "description": "Plastic or Glass bottle",
            "properties": {
                "name": { "enum": ["bottle"] },
                "material": { "enum": ["plastic", "glass"]},
                "quantity": { "type" : "integer"}
            },
            "required": ["name", "material", "quantity"]
        },
        "#bottleCap": {
            "$id": "#bottleCap",
            "type" : "object",
            "description": "Plastic or metal bottle cap",
            "properties": {
                "name": { "enum": ["bottle cap"] },
                "material": { "enum": ["plastic", "metal"]},
                "quantity": { "type" : "integer"}
            },
            "required": ["name", "material", "quantity"]
        },
        "#bag" : {
            "$id": "#bag",
            "type": "object",
            "description": "Plastic bag",
            "properties": {
                "name": { "enum": ["bag"] },
                "material": { "enum": ["plastic"]},
                "quantity": {"type": "integer"}
            },
            "required": ["name", "material", "quantity"]
        },
        "#straw" : {
            "$id": "#straw",
            "type": "object",
            "description": "Plastic straw",
            "properties": {
                "name": { "enum": ["straw"] },
                "material": { "enum": ["plastic"]},
                "quantity": {"type": "integer"}
            },
            "required": ["name", "material", "quantity"]
        },
        "#stirrer" : {
            "$id": "#stirrer",
            "type": "object",
            "description": "Drink stirrer",
            "properties": {
                "name": { "enum": ["stirrer"] },
                "material": { "enum": ["plastic", "wood"]},
                "quantity": {"type": "integer"}
            },
            "required": ["name", "material", "quantity"]
        },
        "#fishingLine": {
            "$id": "#fishingLine",
            "type": "object",
            "description": "Length of Fishing line",
            "properties": {
                "name": { "enum": ["fishing line"]},
                "material": { "enum" : ["plastic"]},
                "quantity": { "type": "integer"},
                "units": { "enum": ["metric", "US Customary"]}
            },
            "required": ["name", "material", "quantity", "units"]
        }
    }
}