ReadonlykeyIdentity within the layer, taken from the data rather than from where the object sits -- a node's name, a tile's path -- so it survives sorting, filtering, a change of language and a rebuild of the chart. The trace finds the object again by this when it is chosen, so a chart that changed under an open list never sends the reader somewhere else.
ReadonlylabelWhat the object is called, as its announcement names it.
Optional ReadonlyvalueIts value, when it has one the announcement gives.
Optional ReadonlydetailWhat else the list says about it, in the reader's language: "Links: 5".
ReadonlyrowThe cell the cursor is taken to.
ReadonlycolReadonlymeasuresNumeric properties, by the id of an ObjectMeasure. A missing or non-finite value is unknown, and sorts last whichever way the list runs.
ReadonlygroupsThe ids of the filters it belongs to.
One thing the object list can take the reader to.