Extraction of annotations from DAVID

I’m trying to develop a tool for extracting annotation terms excluding identifiers (i.e. ‘nitronate monooxygenase activity’ from ‘GO:0018580~nitronate monooxygenase activity,’) from DAVID results using regular expressions in R.

DAVID has >40 annotation categories as mentioned here and the format of entries varies from category to category. I need to study the format in which annotations from each of the categories are stored/displayed by DAVID and I’m unable to find any documentation for the same. I understand that this might be a little off-topic to ask about resources, but suggestions would be very helpful.