diff between meta data and model data

1) Meta data:Also known as data about data is the information about the contents and uses of the data warehouse. Meta data is created by several components of the data warehouse and provides a business and technical view of the data warehouse solution.2)model data:A data model is an abstract model that describes how data is represented and used.The term data model has two generally accepted meanings:A data model theory i.e. a formal description of how data may be structured and used. A data model instance i.e. applying a data model theory to create a practical data model instance for some particular application. Thanks & Regards,Akruthi