Spearman correlation coefficients for dbViz and Rhino.

		SFC'	TFC	TFCmax	HFC	Bugs
dbViz	SFC	0.75	0.69	0.63	0.92	0.38
	SFC'	-	0.56	0.49	0.73	0.35
	TFC	-	-	0.82	0.88	0.52
	TFCmax	-	-	-	0.78	0.50
	HFC	-	-	-	-	0.49
Rhino	SFC	0.51	0.27	0.40	0.36	0.62
	SFC'	-	0.59	0.68	0.62	0.58
	TFC	-	-	0.86	0.99	0.38
	TFCmax	-	-	-	0.88	0.52
	HFC	-	-	-	-	0.44
All correlations are statistically significant at the 1% level.
The sample size (number of feature pairs) is 78 in dbViz and 84,255 in Rhino.
HFC uses weights of 0.5 for both structural and textual information.