| Name | Type | Require | Description |
| Spot Index | Integer | true | |
| Apparent Mass (Da) | Double | true | The apparent mass position of a spot |
| Apparent Pi | Double | true | The apparent charge position of a spot |
| Area (pixel) | Double | false | The size of the spot |
| Intensity | Double | false | The average intensity of a spot |
| Local Background | Double | false | Image background level close to the spot |
| Volume (pixel) | Double | false | Raw spot 'volume' |
| Pixel X Coord (pixel) | Double | false | X-coordinate of spot centre in pixels |
| Pixel Y Coord (pixel) | Double | false | Y-coordinate of spot centre in pixels |
| Pixel Radius (pixel) | Double | false | Radius of spot in pixels |
| Normalized Volume | Double | false | Normalised spot 'volume' |
| Annotation | String | false | Putative protein assignment for the spot |
| Annotation Source | String | false | Origin of information for putative protein assignment |
| Normalization | String | false | Type of normalisation applied |
| Analyte Processing Step Type | AnalyteProcessingStepChoice[] | false | A single step in analyte processing |
| Boundary Point | BoundaryPoint[] | false | A single point from the boundary of a spot |
| DiGE Gel Item | DiGEGelItem[] | false | The particular dye(s) associatedwith a band/spot |
| Related Gel Item | RelatedGelItem[] | false | Relevant band/spot(s) on other gel(s) |