Reloading OWB Projects after an Instance Rebuild

I am working in an environment where we have one Design Repository and three Runtime Repositories. Each of the Runtime Repositories is on a different Oracle DB instance (DEV, TEST, and PROD). We will periodically ‘destroy’ and ‘rebuild’ these instances until we are satisfied with our installation. When we do a ‘rebuild’ on an instance it doesn’t affect my Design Repository because it is separate from the three DB instances. The metadata that was in the Design Repository before the rebuild is still there after the rebuild.
What are affected are the Runtime Repository and the Target Schema that resided in the DB instance before the rebuild. Our DBA has written scripts to reinstall both of these after a rebuild but of course they are missing all of the code for the packages etc. that were deployed to them from my OWB project.
As it stands now, after each rebuild I have to manually register the Source and Target Locations, redeploy the code for all deployable objects (Custom Transformation Operators etc.), open each mapping and do an ‘Inbound Reconcile’ on the Source and Target tables, and then regenerate and redeploy the code for the mappings. What we would like to do is find some way to automate all of these tasks.
In reading through the forum threads I see that others are trying to accomplish the same thing or something very similar. There are multiple mentions of ‘.tcl’ files or scripts. What are these and what tool/utility is used to create them? Where can I read up on this? There are also multiple mentions of ‘Snapshots’. Is this an OWB utility?
I think it would solve my problem if I could capture the state of both the Runtime Repository and the Target Schema before the rebuild and then use that to restore both of them to their original state after the rebuild. Does anyone know how to do this? What documentation exists to describe the tools/utilities needed and how to use them?
Thanks in advance for your help.

Good morning Don,
You can automate tasks by using scripting. This consists of something called OMBPlus/OMB (Oracle MetaBase => repository-DML-language) and TCL.
Tcl is a scripting language which is designed to be embedded in applications.
The Warehouse Builder scripting language, known as OMB Plus, is an extension of the Tcl programming language. With OMB Plus, you can write the syntactic constructs
such as variable support, conditional and looping control structures, error handling, and standard library procedures.
Check http://www.oracle.com/technology/products/warehouse/sdk/scripting%20pages/Scripting_home.htm to get an overview from Oracle on the entire subject.
Check the OWB Scripting Reference for commands to manipulate the Repository: http://download.oracle.com/docs/pdf/B12152_01.pdf
Also check http://www.oracle.com/technology/products/warehouse/pdf/OWB_Scripting_Paper.pdf
A snapshot is related to repository objects. It contains all the information (metadata) about object(s) and the relationships for the object(s). It is used for Change Management.
For a full description see the "Metadata Change Management" chapter in the User Guide.
Good luck, Patrick

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