schema dependencies

How are the dependencies for a schema document figured out? I have the same schema in our Dev, QA, and Prod environments, but the Dev server shows no dependencies at all, while QA and Prod are identical and with a much larger list of dependencies. The code base between the machines isn’t that different. For instance, I can do a *nix ‘find’ command on each environment and find a near-identical list of flow services that this schema appears in.

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