Few basic ques on Web Dynpro

Hi All,

I have few ques on Web Dynpro basics.

1. Why is Web Dynpro said to have language-neutral metamodel.

2. What is meta-model.

3. What is declarative programming approach.

4. Why is a dictionary used. The simple type and a structure can also be declared in a Controller. Is it just a Global Declaration.

5. Where does the code of dictionary reside.

Shall be grateful for the answers.

Regards

Nikhil Bansal