Hi Yasser,
I completely understand your challenge - SID can feel overwhelming at first, especially when approached directly from the full XMI/UML model. It's a very broad and deep information model, and most practitioners never consume it "end-to-end."
From my experience, a more practical approach is to start with purpose rather than structure:
1. Begin with the business domain you are working in
SID is organized into many domains (Customer, Product, Service, Resource…).
Trying to read all of them at once makes it abstract.
A simpler entry point is:
Which Open APIs are you planning to use?
Which TMF component (Customer, Product, Service) does your use case belong to?
Then explore only that SID domain first.
2. Use Open API payloads as your primary navigation
A very effective workflow is:
Pick a TMF Open API (e.g., TMF620, TMF622, TMF641).
Identify its main objects.
Look up those exact classes inside the SID.
This way, SID becomes a "reference model" supporting something concrete, not a standalone maze.
3. Don't try to consume SID top-down
Practitioners rarely study the entire model.
Most work bottom-up, through:
Examples
API payloads
Real use cases
Mapping exercises (API → SID → internal model)
SID is meant to provide consistency and vocabulary, not a step-by-step design blueprint.
4. Useful beginner path
A lightweight learning flow that helps newcomers:
1. Pick a single use case (e.g., Product Ordering).
2. Read the corresponding Open API spec.
3. Open the SID domain referenced by that API (Product, Service…).
4. Trace only the classes used in that API.
5. Expand outward gradually when needed.
This makes SID feel structured instead of infinite.
5. Tools for more intuitive navigation
Rather than loading the raw XMI, it helps to use:
Simplified UML views available in some TMF user guides
Model browsers that allow filtering by domain or class hierarchy
Smaller curated excerpts focused on one capability (many projects internally use such subsets)
Conclusion:
SID becomes manageable once you stop treating it as "one big model" and start consuming it as a set of domain-specific reference maps that support concrete APIs or scenarios.
If you share which area you're starting with (Customer, Product, Service, etc.), the community can also point you to the most relevant slices of SID.
Best regards,
Furooshin
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Furooshin Firoz
TO BE VERIFIED
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