[ APP CONFIGURATION PROPERTY LIST ]

Properties are information you store in a table specifically designed to be managed in a key:value:type:attributes perspective.
One property describes one configuration parameter, and it can not exist twice. Basic parameters can be specified in app.yml and modifications can be stored in database.
You could get a property value with a custom method like this way:

tax: { key: IVA 16%, value: 16, type: tax, attributes: "IVA" }


[ INVOICE PROPERTY LIST ]