What are extract and loading in strategies in ab inito and with what components we extract and load the data?

Can we create an Informatica source by using the DML of the corresponding Abinitio source,by importing the DML,without using the manual create source option?

Hi,
Can we create an informatica source by using the the abinitio dml directly rather than manually creating the source.Just like the way,I tried for creating an informatica source from an informatica target by making respective changes in the xml structure and importing the same.

What are the important concepts required for speedy process of verification. . .?

What is the structure of parameter sets?

What are ab_constructs? What is its use?

How to use a normal batch graph as a sub graph in Continuous graph?

How does one make use of the "Call Web Service" component in the $AB_HOME/connectors/Internet directory of the component selector window of the Ab Initio Console? Explain with Sample Code