A Proxy representing a single item in an Ordered List.

Slots are required to have an index, which should be less than or equal to its ordered list¦s length, and an item, providing the thing being proxied by the slot.

A Slot is not actually required to have an ordered list by , and this caveat may prove useful for ordered slots in Aggregations of indeterminate length, or Aggregations which allow multiple slots with identical indices. In these cases, Slots will still never·the·less be a proxy in some Aggregation, which provides the context for interpreting their index.