> For the complete documentation index, see [llms.txt](https://docs.geoprismregistry.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.geoprismregistry.com/version/v2.0.0/explore/spatial-knowledge-graphs-skg/create-and-publish-a-spatial-knowledge-graph-skg.md).
# Create and Publish a Spatial Knowledge Graph (SKG)
Publishing an SKG is a two-part process. First you create a configuration that says which types to include and which dates to use. Then you publish versions of it. External systems receive each version through an [external system synchronization](/version/v2.0.0/external-system-integration/synchronize-an-external-system.md).
## Creating an SKG configuration
1. Navigate to the **Publish SKG** page from the sidebar.
2. Click **Create** to open the **Configuration** form.
3. Fill out the form. Select every type the SKG needs: an edge is only included when its edge type and the types at both of its ends are all selected.
| Field | Description | Required |
| ---------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------- |
| Label | The label of the SKG. | Required |
| Valid For |
The date whose attribute values are published. Geoprism Registry tracks changes over time, so each Geo-Object and business object is published with the values it had on this date.
Example: For a 2025 analysis, set Valid For to December 31, 2025.
| Required |
| Start of period of validity | The start of the period of validity recorded on the published data. | Required |
| End of period of validity | The end of the period of validity recorded on the published data. In the current version, this second date field is also labelled **Start of period of validity**. | Required |
| Geo-Object Types | The Geo-Object Types to include. If a Geo-Object Type has a Concept Set, its Concepts are published automatically. | |
| Hierarchy Types | The hierarchies to include. | |
| Directed Acyclic Graph Types | The directed acyclic graph types to include. | |
| Undirected Graph Types | The undirected graph types to include. | |
| Business Types | The Business Types to include. | |
| Business Edge Types | The Business Edge Types to include. | |
4. Click **Submit**. The SKG's configuration summary opens.
5. Click **Publish updates** to publish the first version of the SKG.
{% hint style="warning" %}
Publishing deletes all [rollback checkpoints](/version/v2.0.0/curate/rollback-data.md). Imports made before a publish can no longer be rolled back.
{% endhint %}
## Publishing updates
After the first version, you control when external systems receive new data by publishing new versions.
1. On the **Publish SKG** page, click the SKG in the list.
2. Click **Publish updates**.
Each new version contains only the changes to the selected types since the previous version. If nothing has changed, a message says there are no new events to publish.
The **Versions** table lists each version with its **Number**, **UID** and **Date**.
## Deleting an SKG
Click the trash icon next to the SKG in the list and confirm by clicking **Delete**.
