 @column unmapped_reason_id           Primary key, internal identifier.
 @column summary_description          Summarised description.
 @column full_description             Full description.
-    
+
 */
 
 CREATE TABLE unmapped_reason (

@desc Stores data about the external databases in which the objects described in the xref table are stored.

@column external_db_id              Primary key, internal identifier.
@column db_name                     Database name.     
@column db_release                  Database release.      
@column status                      Status, e.g. 'KNOWNXREF','KNOWN','XREF','PRED','ORTH','PSEUDO'. 
@column priority                    Determines which one of the xrefs will be used as the gene name.
@column db_display_name             Database display name.
@column type                        Type, e.g. 'ARRAY', 'ALT_TRANS', 'ALT_GENE', 'MISC', 'LIT', 'PRIMARY_DB_SYNONYM', 'ENSEMBL'.

@column prediction_exon_id              Primary key, internal identifier.
@column prediction_transcript_id        Foreign key references to the @link prediction_transcript table.
@column exon_rank                       Exon rank
@column seq_region_id                   Foreign key references to the @link seq_region table.
@column seq_region_start                Sequence start position.
@column seq_region_end                  Sequence end position.
@column seq_region_strand               Sequence region strand: 1 - forward; -1 - reverse.
@column start_phase                     Exon start phase.
@column score                           Prediction score.
@column p_value                         Prediction p-value.
