Table 3.

Summary of design objectives fulfilled by each proof-of-concept application

Proof-of-concept	Design obj.
	Interoperability	Multi-user	AI support	Data storage	Easy to develop
AR cube	$✓$	$✓$	$✓$		$✓$
xAPI data analysis		$✓$	$✓$	$✓$	$✓$
AR geography quiz	$✓$	$✓$		$✓$