There are two types of data flow diagrams, each with its own set of pros and cons. The significance of MetaData in a data warehouse and why it is used.

There are two kinds of data flow diagrams: logical and physical. Why does a data warehouse need meta data so much?

The notion of data flow diagrams may be separated into two different categories, each with its own advantages and disadvantages. Why is MetaData such an important element of a data warehouse?

A logical data flow diagram depicts the movement of data logically, as opposed to a physically organised data flow diagram, which depicts the movement of data physically. What does the term "MetaData" refer to in the context of a data warehouse? Why is it regarded as having such significance?