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by philomath_mn 1043 days ago
I think they just mean the meaning of the data that comes through, which naturally consitutes the information important to that domain.

I work in fintech, the data points of my domain are transactions, prices, properties of different instruments, etc.

This data is moved + manipulated in different ways using different formats by different systems, but each day I accumulate useful context and expertise on the data of my domain.