How to connect to different data sources in XI 3.1 UNIVERSE?

hi experts,
We are going to migrate from BO 6.5 to BO XI3.1.
and we have different data sources to extract and generate the reports using various tools like Webi,Crystal Reports, Deski etc.
1         How to connect to different data sources like SAP BI query, DB2, Oracle etc,, provide me the step by step solution.
2     We need to migrate the universes and reports from BO 6.5 to BO XI 3.1 using the Report Conversion Tool.
can we directly convert from the deski reports to Webi or do we need to migrate first through Import Wizard?
3    Scheduling the Reports through Infoview
4    Various issues and how to resolve those issues, we generally face while scheduling, and while creating the queries like for example time out errors etc..
5    BO Security
6    Universe creation with best practices and the loops,contexts,aliases etc..
please provide me the step by step solution documents and links.
thans in advance
venuscm

I would recommend to take a look at the official documentation. YOu can find this here
http://help.sap.com
NAvugate to SAP BusinessObjects->All products and the select the product you want eg. BusinessObjects ENterprise or Universe designer and the appropriate version XI 3.1. Take a look at the admin and the user guides.
Currently the Data FEderator will allow you to buid a universe that access data from various data sources. Another option is to merge queries from different universes at report level.
Regards,
Stratos

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