I'm writting a table for a scientific paper and I'm not sure what to capitalize in the column-headings. Which rule should be used? Normal English capitalization (then the next question is: write the first word upper case?) or the one where everything except for some words (of, in...) is written in uppercase?
Example for the possibilites:
| Programming Language | Programming language | programming language |
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System 1 | Java | Python | Erlang |