Module chart 

Structs

AnnotationSpec

AxesSpec

AxisSpec

ChartSpec

ChartStyleSpec

DataLabelsSpec

FieldSpec

A row/column field specification.

InlineData

Inline / single-source data descriptor. Every field is optional so the struct matches all of JS chartml’s reserved-key shapes: rows-based inline data, url-based HTTP, provider-based plugin, and datasource+query-based slug references.

LayoutSpec

MarkEncodingSpec

MarksSpec

VisualizeSpec

Enums

ChartMode

DataRef

FieldRef

FieldRefItem

Items within a FieldRef::Multiple array — each can be a string or a detailed spec.

MarkEncoding

Orientation

StyleRefOrInline