Connecting 3rd party database & SAP system thru XI

Hi Friends,

I am working on a Scenario in XI very similar to Described in Master guide (1.3.5) & (1.3.2).( Data from a legacy system needs to be read at regular intervals & made available to another system(SAP) in the form of an XML Message.)

To be exact the scenario is like SQLSERVERDB<==>XI2.0<==>SAPR/3 4.6C

My Questions are,

1. Can I define in "SLD", the Legacy System Database (Non SAP system) from which data is read( Similar to how we define sAP systems in SLD) ?

2. Basically, I will be querying the database Using the JDBC Adapter. Since I am specifying the query during configuration of the adapter,I am not able to visualize the reason for specifying an Interface for the Legacy system in Integration repository. Assuming, still if I have to define an interface at DB side.

What will be the input & Output message type?

Does all these things will be taken care by JDBC adapter, while I configure the adapter?

Do I just have to define an interface & link that to the adapter?

3. If I need an Outbond & Inbound JDBC adapter. Do I have to run two instances of the adapter & configure one has Inbound and other has outbond?

4. In the XI Documentation it says JDBC adapter comes with XI2.0. I know I need to install & configure it. But is the adapter Free of cost?

5. Please refer me some websites/Links from where I can get information on how to Handle this type of Scenarios.

thanking you in anticipation

bye

Mathew