The Metadata Coverage Index (MCI): A standardized metric for quantifying database metadata richness

Table 2. Comparison of MCI scores from the GOLD database.¹

Project List		Field group	Fields per Record	Records	Total Fields	Filled Fields	MCI %
A.	1. GEBA	CORE	103	256	26,368	14,287	54.18
	2. Complete			2,040	211,253	109,532	52.00
	3. HMP			2,096	215,888	87,007	39.91
	4. All Projects			13,790	1,420,370	522,850	37.00
B.	1. Archaea	CORE	103	340	35,020	16,767	48.00
	2. Bacteria			11,233	1,156,999	443,474	38.00
	3. Eukarya			2,217	228,351	62,609	27.00
C.	1. GEBA	MIGS	12	256	3,072	2,102	68.43
	2. Complete			2,040	24,612	14,667	59.59
	3. HMP			2,096	25,152	9,642	38.34
	4. All Projects			13,790	165,480	62,564	37.81
D.	1. HMP	HMP	10	2,096	20,960	14,673	70.00
E.	1. All-2008	2008	33	2,905	95,865	59,097	61.65
	2. All-2010			5,843	192,819	119,881	62.17
	3. All-2012			13,790	455,070	273,805	60.17

¹Note that if all variables in a database or collection apply to all records, then ‘total fields’ is equal to records multiplied by fields. If some variables are specific to a subset of records then the total number of possible fields will be smaller.

ISSN: 2524-6372