> ## Documentation Index
> Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt
> Use this file to discover all available pages before exploring further.

# UnderlyingDescription

The **UnderlyingDescription** store contains the description of the [curve](../../csr-non-sec/data-model-core/curve).

The following table lists the fields in the store that are used for the GIRR risk-class.
See the [UnderlyingDescription](../../../../../../datastore/standardisedapproach/underlying-desc) store documentation for details on the store.

| Data Model Field | Store Field     | Notes                            |
| ---------------- | --------------- | -------------------------------- |
| As-Of Date       | AsOfDate        |                                  |
| Curve Name       | Underlying      |                                  |
| Risk Class       | RiskClass       | “GIRR”                           |
| Curve Type       | GIRR Curve Type | “Yield”, “Basis”, or “Inflation” |
| Curve Currency   | GIRR ccy        |                                  |