 @table  annotated_feature
 @desc   Represents a genomic feature as the result of an analysis i.e. a ChIP or DNase1 peak call
 
-@column annotated_feature_id	Primary key: internal id 
-@column seq_region_id   	   	Key: @link seq_region table id
+@column annotated_feature_id	Internal ID 
+@column seq_region_id   	   	@link seq_region table ID
 @column seq_region_start   		Start position of this feature
 @column seq_region_end      	End position of this feature
 @column seq_region_strand   	Strand orientation of this feature
 @column display_label       	Text display label 
 @column score               	Score derived from software
-@column feature_set_id 	 		Key: @link feature_set table id
+@column feature_set_id 	 		@link feature_set table ID
 @column summit					Represents peak summit for those analyses which provide it (e.g. Swembl)
 
 @see @link seq_region; @link feature_set

@table  array
@desc   Contains information defining an array or array set

@column array_id	Primary key: 	Internal id
@column name     	Unique key:  	Name of array
@column format      Format of array e.g. EXPRESSION, TILED
@column vendor		Composite Key:	Name of array vendor e.g. AFFY
@column description Text description
@column type		Array type e.g. OLIGO, PCR
@column class		Array class e.g. AFFY_ST, ILLUMINA_INFINIUM  

@table  probe_set
@desc   The table contains information about probe sets.

@column probe_set_id		Internal ID 
@column name				Name of the probe set
@column size				Integer size of the probe set i.e. how many probe is contains
@column family				Generic descriptor for probe_set e.g. ENCODE_REGIONS, RANDOM etc. Currently not used
