Accessible data visualization reference

• WCAG 2.2 Success Criterion 1.4.1 requires that color not be the only means of conveying information. Add labels, patterns, shapes, line styles, or text alternatives.
• WCAG 2.2 Success Criterion 1.4.3 covers text contrast. Small labels and legends need particular care.
• W3C SVG 2 accessibility guidance describes meaningful titles, descriptions, and accessible naming for SVG graphics.
• W3C WAI complex images tutorial recommends a concise purpose statement plus a longer text alternative for charts and other complex graphics.

For a diagram.zip SVG, provide a meaningful title and description when the chosen source format supports them, and pair the image with a nearby textual summary or data table. Do not rely on color, hover, animation, or spatial position alone. Preserve readable focus/order in interactive variants and state the data source, date, aggregation, and uncertainty in accompanying text.