Subject Area is place where  we draw the entities and attributes of the dimensions and fact table with relationships in ERWIN.Dimension modelling is brokent into subject Areas which are nothing but functional areas of an enterprise.

When we extract the source qualifier haing one option called blob by utilizing that option we can load to target and check in ports mainly.

Define the variables in Start script and use them in graph. All enviroment variables which have been exported in the shell which is invoking abinitio (  eg. all variables exported in .profile ) will also be available in Abinitio graph.

In DWH loops may exist between the table. If loops exist, then query generation will take more time, because more than one path is available. It creates ambiguity also. Loops can be avoided by creating aliases of the table or by context.. i.e. defining execution path.