| attribute | type | cardinality | unique? | required? | doc | examples |
|---|
| cell-populations | cell-population | many | | | Any cell populations to which this cell has been assigned membership, e.g. via clustering. | |
| id | string | one | yes | | The id for a given single cell. Must be uniquely identifying, so often a concatenation, e.g. sample-barcode. | |
| image-segment-area | float | one | | | Area (in pixels) of image segment | |
| normalized-image-coordinate-x | float | one | | | X coordinate in normalized image coordinate scheme for segment centroid | |
| normalized-image-coordinate-y | float | one | | | Y coordinate in normalized image coordinate scheme for segment centroid | |
| pixel-image-offset-x | float | one | | | X coordinate in pixel offset (upper left coordinates) for segment centroid | |
| pixel-image-offset-y | float | one | | | Y coordinate in pixel offset (upper left coordinates) for segment centroid | |
| sample | sample | one | | | The sample from which this single cell was sourced. | |
| uid | [[* string]] | one | yes | | Synthetic unique ID for single cells. | |