![[str_idx_gist.png|256]] - **Description**: "Generalized Search Tree". It's not a single index type but a framework for implementing many different indexing strategies. - **Supported Operators**: Varies by operator class (e.g., `&&`, `@>`, `<@`, `~=`). - **Special Features**: - Excellent for high-dimensional data (Geometry, IP ranges). - Supports "nearest-neighbor" distances using the `<->` operator. - **Metaphor**: A multi-layered, magical sieve. You throw a bunch of shapes at it, and it catches exactly the ones that "overlap" or are "nearby" your target.