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[`BasesPropertyType`](BasesPropertyType)
## BasesPropertyType type
The three valid "sources" of a property in a Base.
- `note`<!-- -->: Properties from the frontmatter of markdown files in the vault. - `formula`<!-- -->: Properties calculated by evaluating a formula from the base config file. - `file`<!-- -->: Properties inherent to a file, such as the name, extension, size, etc.
1.10.0
**Signature:**
```typescript
export type BasesPropertyType = 'note' | 'formula' | 'file';
```