schema.json

{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "title": "MapleStory music database",
    "description": "Definitive MapleStory music database",
    "type": "array",
    "items": {
        "title": "MapleStory music",
        "type": "object",
        "properties": {
            "description": {
                "description": "Description of the song's usage",
                "type": "string"
            },
            "filename": {
                "type": "string"
            },
            "mark": {
                "description": "Map icon associated with the song",
                "type": "string"
            },
            "metadata": {
                "type": "object",
                "properties": {
                    "album-artist": {
                        "type": "string"
                    },
                    "artist": {
                        "type": "string"
                    },
                    "subtitle": {
                        "description": "Song title from data",
                        "type": "string"
                    },
                    "title": {
                        "description": "Official song title",
                        "type": "string"
                    },
                    "year": {
                        "type": "string"
                    }
                },
                "required": ["album-artist", "artist", "title", "year"]
            },
            "source": {
                "type": "object",
                "properties": {
                    "client": {
                        "description": "Client of origin",
                        "type": "string"
                    },
                    "date": {
                        "description": "Date of release",
                        "type": "string"
                    },
                    "structure": {
                        "description": "Folder structure",
                        "type": "string"
                    },
                    "version": {
                        "description": "Version of origin",
                        "type": "string"
                    }
                },
                "required": ["structure"]
            },
            "youtube": {
                "description": "YouTube video identifier",
                "type": "string"
            }
        },
        "required": ["description", "filename", "mark", "metadata", "source", "youtube"]
    }
}