Module data 

Haystack data collection types.

• HDict — Tag dictionary (ordered map of name → Kind value). Represents a single entity, grid metadata, or column metadata.
• HGrid — Two-dimensional table of HCol columns and HDict rows. The primary data exchange format in the Haystack protocol.
• HCol — Named column with optional metadata dict.
• HList — Ordered list of Kind values.

Structs

HCol

A single column in a Haystack Grid.

HDict

Haystack Dict — the fundamental entity/row type in Haystack.

HGrid

Haystack Grid — the fundamental tabular data structure.

HList

Haystack List — a thin wrapper around Vec<Kind>.