Exact chart series

Use variable when you know the full, case-sensitive projection row name or need a label, colour or order for an individual series. The name must already exist in the CSV; naming a derived variable does not calculate it.

One exact series

- chart:
    title: USA inflation
    series:
      - variable: INFL(USA)

Compare two exact series

- chart:
    title: Interest rates
    series:
      - variable: INTN(USA)
        label: Nominal interest rate
      - variable: INTR(USA)
        label: Real interest rate
        style:
          color: "#2455a4"
          line: dash

First verify that both series have the same units.

Choose a deliberate line order

series:
  - variable: INFL(CHN)
  - variable: INFL(USA)
  - variable: INFL(JPN)

Lines and legend labels follow the authored sequence. Use a selector when you want all matching model members in catalogue order.

Exact series may also set individual start and end years when used in a series-delta chart.

For paired scatter, use x_variable and y_variable together instead of variable. A waterfall also needs a role on each series. Do not repeat a component in a composition or a step in a waterfall: those types reject duplicate variable names to avoid counting a contribution twice.