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# Topic: metadata

| Tool | Description |
|--------|-------------|
| [r.describe](r.describe.md) | Prints terse list of category values found in a raster map layer. |
| [r.info](r.info.md) | Outputs basic information about a raster map. |
| [r.region](r.region.md) | Sets the boundary definitions for a raster map. |
| [r.support](r.support.md) | Allows creation and/or modification of raster map layer support files. |
| [r.timestamp](r.timestamp.md) | Modifies a timestamp for a raster map. Print/add/remove a timestamp for a raster map. |
| [r3.info](r3.info.md) | Outputs basic information about a user-specified 3D raster map layer. |
| [r3.support](r3.support.md) | Allows creation and/or modification of 3D raster map layer support files. |
| [r3.timestamp](r3.timestamp.md) | Modifies a timestamp for a 3D raster map. Print/add/remove a timestamp for a 3D raster map. |
| [t.info](t.info.md) | Lists information about space time datasets and maps. |
| [t.select](t.select.md) | Select maps from space time datasets by topological relationships to other space time datasets using temporal algebra. |
| [t.support](t.support.md) | Modifies the metadata of a space time dataset. |
| [t.upgrade](t.upgrade.md) | Upgrades the version of the temporal database. |
| [v.info](v.info.md) | Outputs basic information about a vector map. |
| [v.support](v.support.md) | Updates vector map metadata. |
| [v.timestamp](v.timestamp.md) | Modifies a timestamp for a vector map. Print/add/remove a timestamp for a vector map. |

*See also the corresponding keyword for additional references:*

<!-- topic_keyword { include: [metadata] } -->
