| field | example | SQL type | description |
|---|
| bin | 585 | smallint(5) unsigned | Indexing field to speed chromosome range queries. |
| chrom | chr1 | varchar(255) | Reference sequence chromosome or scaffold |
| chromStart | 10074 | int(10) unsigned | Start position in chromosome |
| chromEnd | 11098 | int(10) unsigned | End position in chromosome |
| name | chr1.920165 | varchar(255) | Name of item |
| span | 1 | int(10) unsigned | each value spans this many bases |
| count | 1024 | int(10) unsigned | number of values in this block |
| offset | 941815562 | int(10) unsigned | offset in File to fetch data |
| file | /gbdb/hg38/cactus241way/phy... | varchar(255) | path name to data file, one byte per value |
| lowerLimit | -4.522 | double | lowest data value in this block |
| dataRange | 4.614 | double | lowerLimit + dataRange = upperLimit |
| validCount | 1024 | int(10) unsigned | number of valid data values in this block |
| sumData | -187.227 | double | sum of the data points, for average and stddev calc |
| sumSquares | 506.714 | double | sum of data points squared, for stddev calc |