Purpose: Stores any data submitted after the end date of a paper for Progress Tests and Summative exams.
Joins: users, papers, questions and log_metadata tables.

Field	Type	Purpose
id	int(8)	Primary Key – auto increment.
q_id	int(4)	ID of the question that is being saved.
mark	float	Mark awarded to student
adjmark	float	Adjusted mark awarded to student
totalpos	tinyint(4)	Maximum available marks for this question
user_answer	text	User answer
errorstate	tinyint(3)	6.0.5 onwards - stores calculation question error state (numerical value from Rserv)
screen	tinyint(3) unsigned	Screen the question is on (Note: same question ID could be on multiple screens in a survey)
duration	mediumint(9)	Time the user has spent in seconds on the current screen
updated	datetime	Datetime when this question has last saved
dismiss	char(20)	Storage of any dismiss data so that state can be remembered while traversing screens
option_order	varchar(255)	The order the various stems were presented in within a question
metadataID	int(11) unsigned	The ID of the main log_metadata record

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