I am reading up on Togaf Data Architecture. A lot of inputs are mentioned.
Does the framework propose any methods or mechanisms (without being over prescriptive) what to do if the inputs are not available? What are the implications if some are not available?
Preferred answers refer to Togaf.
If Togaf has no answer, personal opinions are welcome as well.
Thanks
TOGAF does encourage tailoring the framework to fit organization and stakeholder's need, including Content Tailoring which you can customize artifacts and deliverables used in ADM.
So, instead of "what to do if lots of inputs are not available", I think that you can determine what inputs are critical and what inputs could be optional in Preliminary Phase step 5.3.5 "Tailor the TOGAF Framework".
Another suggestion from TOGAF about how to deal with shortage of artifacts:
In fact, the first execution of the ADM will often be the hardest, since the architecture assets available for re-use will be relatively scarce. Even at this stage of development, however, there will be architecture assets available from external sources such as the TOGAF standard, as well as the IT industry at large, that could be leveraged in support of the effort.
While IMHO it is less practical to look external sources (it is less likely that other companies in your industry will share their EA works with you), there are indeed some reference architectures such as https://publications.opengroup.org/p180 which might give you some more ideas.