# Item

An item is the fundamental directly accessible aggregation
of data in D3.

An item can be composed of one or more attributes, which
may be composed of one or more values, which may be composed of one
or more subvalues.

Each item is statistically hashed to a group
within a file based on the content and length of the item-ID, or key
to the item.

---
Source: https://d3codex.com/definitions/item/ - part of the D3Codex reference.