oxml-chart

Model, edit, serialize, and render format-neutral ChartML with typed chart data and geometry.

Capabilities

Typed axes, series, titles, legends, labels, and seven plot families.
Chart XML authoring with an editable embedded workbook.
Backend-neutral chart geometry for document-family renderers.
Ordered preservation of unmodelled XML around typed edits.
Sparse caches, explicit axis bounds, mixed plots, labels, and theme-resolved series paint remain editable without losing unsupported plot payloads.

Measured footprint and speed

The archive row is regenerated from the package that carries this README.

Measurement	Value	Version	Platform	Build mode	Input	Command	Statistic	Measured on
Crates.io archive: oxml-chart	120,147 compressed bytes, 748,086 member bytes, 6 members	0.14.3	macOS 26.6.2, Apple M5 Max, arm64	`cargo publish --workspace --dry-run --allow-dirty --locked`	Tracked `oxml-chart` package inventory	`python3 scripts/readme_doctests.py --record-measurements`	gzip archive bytes, tar member bytes, tar member count	2026-10-22

Use it when

Use this crate when an application needs ChartML models or chart rendering without depending on DOCX or PPTX APIs. Use rpptx for charts inside a complete presentation.

Relationship

It uses focused one-sheet SpreadsheetML workbooks from oxml-sml and feeds backend-neutral chart geometry into document-family renderers. It is not a complete OOXML package editor or a general spreadsheet library.

Example

use oxml_chart::AxisId;

let category_axis = AxisId::new(10_000_001)?;
let value_axis = AxisId::new(10_000_002)?;
assert_ne!(category_axis, value_axis);
# Ok::<(), oxml_chart::ChartError>(())