How to fetch the BOM details from ARAS PLM using API's

Hi,

We are creating a integration layer as a webservice to fetch the data from Aras PLM which can be consumed by other external systems.

We were able to fetch the part details for a particular part number using the below code.

String url = "http://localhost/InnovatorServer/Server/InnovatorServer.aspx";

            String db = "InnovatorSolutions";

            String user = "admin";

            String password = "innovator";

            HttpServerConnection conn =

            IomFactory.CreateHttpServerConnection( url, db, user, password );

            Item login_result = conn.Login();

            if( login_result.isError() )

            throw new Exception( "Login failed" );

            Innovator inn = IomFactory.CreateInnovator( conn );

                    Item abc = inn.getItemByKeyedName("Part", "755.1334.024");

                This returns the details of the given part number.

                Simillarly we need to retrieve the BOM details which is attached to a particular Assembly part number(Top level manufacturing item). Kindly let us know how to retrive the BOM details. what would be the object type which will returns the BOM details.

Also it would be great if you could help me out in retrieving the Work instructions(Document type object) and all the other available type of objects from PLM using API's.