moodle/mod/quiz/format

QUIZ FILE FORMATS FOR IMPORT/EXPORT
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This directory contains plug-in sub-modules to add 
import-export formats to Moodle quizzes.

Each sub-module must contain at least a format.php file 
containing a class that contains functions for reading, 
writing, importing and exporting quiz questions.

Most of them are based on the class found in mod/quiz/format.php