I need to use this word with the following meaning:
This particular dictionary doesn't say anything about whether this word is countable or not. The given example though contains an indefinite article:
The images are stored in a digital format within the database.
So, it is supposed to be a countable noun. But when I reviewed some other examples I've discovered that putting an indefinite article along with the noun is not always the case:
However, neither the raw nor the processed data were provided in digital format.
No data were reported in digital format.
Could you please clarify the cases for me?