> For the complete documentation index, see [llms.txt](https://docs.imerit.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.imerit.net/3d-multi-sensor-fusion/labeling/category-schema/classifications.md).
# Classifications
Each frame or sequence (aka task) can have properties called classifications that provide additional information about the overall frame or sequence, rather than individual objects. Classifications help capture specific characteristics, conditions, or states that apply broadly to the scene.
#### What Are Frame/Task Classifications?
Unlike object attributes (which describe individual annotations like cars or pedestrians), frame and sequence classifications describe:
* Frame-level: Properties of a single frame/timestamp
* Task-level: Properties of the entire sequence/batch
**Frame Classifications:**
* Weather conditions (sunny, rainy, foggy, snowy)
* Lighting conditions (day, night, dawn, dusk)
* Traffic density (light, moderate, heavy)
* Road surface (dry, wet, icy)
* Image quality (clear, blurry, overexposed)
**Sequence Classifications:**
* Location type (urban, suburban, highway, rural)
* Scenario type (normal driving, construction zone, parking lot)
* Recording conditions (stationary, moving vehicle)
Frame and task classifications use the same attribute types as object attributes:
* [Boolean](/3d-multi-sensor-fusion/labeling/category-schema/pct-class-level.md#boolean): Yes/no properties (e.g., "Is raining")
* [Single Select](/3d-multi-sensor-fusion/labeling/category-schema/pct-class-level.md#single-select-dropdown): One option from a list (e.g., Weather: Sunny/Cloudy/Rainy)
* [Multi-Select:](/3d-multi-sensor-fusion/labeling/category-schema/pct-class-level.md#multi-select-dropdown) Multiple options (e.g., Road features: Speed bumps, Potholes, Crosswalks)
* [Text:](/3d-multi-sensor-fusion/labeling/category-schema/pct-class-level.md#text) Free-form input (e.g., Session notes)
---
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