[Retracted] Automatic Grading for Complex Multifile Programs

Table 3

AST data map.

Key	Description
Index	Used for indexing of visiting and traversing process sequences while using ASTVisitor
Node	Visited syntax node
Parent node	Node parent to indicate its parent
Child node	Node child to indicate its child by node parser
Flag	Indicating node type
	(i). Root (node does not have parent and has child or its entry, and it also can indicate starting of program function)
	(ii). Parent (node has parent and child)
	(iii). Child (node has parent only, or its leaf node)
Syntax classifier	Indicating syntax to distinguish whether its user defined syntax or standard programming language syntax; it can be distinguished by comparing standard programming language syntax data provided and learned in database
Process	Indicating process entry (starting process) and exit number of node