The main component of the open hub is an InfoSpoke. All you have to do to extract data from BW using open hub service...
is create and activate an InfoSpoke for each BW object. I have provided a series of screen-prints that show just how easy it is to create an InfoSpoke.
Creating an InfoSpoke
In the main menu of the Administrator Workbench, choose:
Tools _ Open Hub Service
Enter a technical name for your InfoSpoke. Choose:
In the following dialog box, enter a description for your InfoSpoke. You can also specify a template here.
SAP BW Guide: Open Hub Service
Part 1: How to get Open Hub Service
Part 2: Open hub component: Creating an InfoSpoke
Part 3: Creating an InfoSpoke: General Tab
Part 4: Creating an InfoSpoke: Destination Tab
Part 5: Creating an InfoSpoke: InfoObject Tab
Part 6: Creating an InfoSpoke: Selection Tab
Part 7: Activation
Part 8: Extraction
Part 9: Output
Review: Conclusion and other resources