Apache POI or Excel formula grammar

Question

Is there somewhere a formal definition of the grammar of the formulas parsed by Apache POI, or by Excel? If there isn't, I would be content with a list of all the operators supported by Apache POI. This question here how to get the excel workbook mathematical operators using apache poi 3.6? contains a list of all the supported functions (which is great, I also need that intel), but what I'm asking is about the operators (you know, +, -, and what else?)... and anything else that can appear in the formula (parenthesis, curly braces, commas, semicolons, etc).

But if anyone can provide a formal definition of the grammar (BNF, maybe), it would be awesome.

Answer 1

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Your best bet is probably Chapter 3 (Formulas) of the OpenOffice guide to the Excel file format

Alternately, you could look at section 2.2.2 (Formulas) of the Microsoft .xls file format doc ( pdf ), but the Microsoft docs don't seem to be as helpfully laid out for what you're after