> 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/configure/concepts/concept-sets.md).

# Concept Sets

See [Concepts](/version/v2.0.0/configure/concepts.md) for a definition of Concept and general overview.

A Concept Set defines the allowed values for a Geo-Object Type's classification, drawn from your imported Concepts. Each Concept Set uses one Concept Class and one Concept Edge Type.

There are two types of concept sets:

* Enumeration
* Taxonomy

Enumerations define a flat list of data. This is typically how classification options would be defined to restrict the classification options for a Geo-Object Type.

Taxonomies define a hierarchical set of data for when classifications of information are nested in a larger tree of taxonomies. Larger taxonomies may define different levels of data classifications (e.g. residential is on one level with single family and multi-family residential being below that). This enables the ability to select a part of a taxonomy hierarchy that is most relevant to a Geo-Object Type while keeping the over all taxonomic data in one place.

Example:

If a taxonomy Concept Edge Type and your imported Concepts and their relationships define the types of human-built physical structures (e.g. building, dam, etc.), a Concept Set can package them together. Assign that Concept Set to a Geo-Object Type when you create it. During import, each Geo-Object's classification must then be one of those physical structure types. A classification value of "Dam" will be allowed because it's a type of built physical structure as defined by the taxonomy.

## Where Concept Sets are used

You select a Concept Set when [creating a Geo-Object Type](/version/v2.0.0/configure/geo-objects-and-hierarchies/geographic-object-types-outside-a-group/add-a-geographic-object-type.md). This adds an attribute called **classification** to the type. The Concept Set can't be added, changed or removed after the Geo-Object Type is created.

When you import Geo-Object data, the **classification** field appears on the screen where you match the columns in your file to system fields. Select the column that holds each Geo-Object's classification. Its values must be Concepts in the Concept Set.

{% hint style="warning" %}
Prerequisite: Your Concepts and the relationships between them must be imported (see [Import Business Data](/version/v2.0.0/curate/import-business-data.md) and [Import Edge Data](/version/v2.0.0/curate/import-edge-data.md)) before you create a Geo-Object Type that uses the Concept Set, and before you import Geo-Object data to that type.
{% endhint %}

## Creating a Concept Set

1. Navigate to the **Concept Classes** page from the sidebar. The page has three sections, **Concept Classes**, **Concept Edge Types** and **Concept Sets**, which you choose at the top of the list. Select **Concept Sets**.
2. Click **Add**.
3. Fill out the form. None of the fields in the **Configuration** section can be changed after the Concept Set is created.

   <figure><img src="https://3732932512-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9giVyCrmTxAs33YrSRbJ%2Fuploads%2F5zTvCGPsl86DLmgWuUYl%2Fimage.png?alt=media&amp;token=f5a46326-be86-4a36-90cf-9de41d1e0893" alt=""><figcaption></figcaption></figure>

   | Field                  | Description                                                                                                                                                                                                                  | Required |
   | ---------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------- |
   | Code                   | The unique identifier of the Concept Set. It can't be changed later.                                                                                                                                                         | Required |
   | Label                  | The display label, with one field per installed locale.                                                                                                                                                                      | Required |
   | Description (Abstract) | A description, with one field per installed locale.                                                                                                                                                                          |          |
   | Discrete Graph Type    | <p>The structure of the allowed values:</p><ul><li><strong>Enumeration:</strong> a flat list of options.</li><li><strong>Taxonomy:</strong> a branch of a larger taxonomy, chosen with <strong>Root Term</strong>.</li></ul> | Required |
   | Concept Class          | The Concept Class the values come from.                                                                                                                                                                                      | Required |
   | Concept Edge Type      | The Concept Edge Type that relates the Concepts.                                                                                                                                                                             | Required |
   | Root Term              | For a taxonomy, the Concept at the top of the branch you want. That Concept and every Concept below it are valid values. Start typing to search for it.                                                                      |          |
4. Click **Submit**.

To change a Concept Set's label or description, click the three-dot menu next to it and select **Edit**. To remove it, select **Delete**.