> For the complete documentation index, see [llms.txt](https://navixy.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://navixy.com/docs/navixy-repository-api/core-api-reference/catalogs/system.md).

# System catalogs

{% hint style="warning" %}
**Navixy Repository API is a work in progress.** This documentation is published for preview purposes only and doesn't reflect a stable release. Structure, field names, and behaviors are subject to change.
{% endhint %}

System-defined catalog items that cannot be modified by users.

## Objects

### Module

A system module that groups related functionality and permission scopes. Examples: repo (core), fleet\_management (FSM), iot (devices), reports, billing.

**Implements:** [CatalogItem](/docs/navixy-repository-api/core-api-reference/catalogs/catalog-items.md#type-catalogitem), [Node](/docs/navixy-repository-api/core-api-reference/common.md#node), [Versioned](/docs/navixy-repository-api/core-api-reference/common.md#versioned), [Titled](/docs/navixy-repository-api/core-api-reference/common.md#titled)

| Field          | Type                                                                                                              | Description                                                                     |
| -------------- | ----------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------- |
| `id`           | `ID!`                                                                                                             | A globally unique identifier.                                                   |
| `version`      | `Int!`                                                                                                            | The version number for optimistic locking.                                      |
| `title`        | `String!`                                                                                                         | The human-readable display name. Can be localized.                              |
| `code`         | `Code!`                                                                                                           | A machine-readable code, unique within the catalog scope.                       |
| `order`        | `Int!`                                                                                                            | The display order within the same level or category.                            |
| `catalog`      | [Catalog](/docs/navixy-repository-api/core-api-reference/catalogs/catalog-items.md#catalog)!                      | The catalog this item belongs to.                                               |
| `organization` | [Organization](/docs/navixy-repository-api/core-api-reference/organizations.md#organization)                      | The organization that owns this item. Null for system items.                    |
| `meta`         | [CatalogItemMeta](/docs/navixy-repository-api/core-api-reference/catalogs/catalog-items.md#type-catalogitemmeta)! | Metadata about this item including description, origin, and display properties. |

***

### EntityType

A definition of an entity type in the system.

**Implements:** [CatalogItem](/docs/navixy-repository-api/core-api-reference/catalogs/catalog-items.md#type-catalogitem), [Node](/docs/navixy-repository-api/core-api-reference/common.md#node), [Versioned](/docs/navixy-repository-api/core-api-reference/common.md#versioned), [Titled](/docs/navixy-repository-api/core-api-reference/common.md#titled)

| Field                    | Type                                                                                                                | Description                                                                     |
| ------------------------ | ------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------- |
| `id`                     | `ID!`                                                                                                               | A globally unique identifier.                                                   |
| `version`                | `Int!`                                                                                                              | The version number for optimistic locking.                                      |
| `title`                  | `String!`                                                                                                           | The human-readable display name. Can be localized.                              |
| `code`                   | `Code!`                                                                                                             | A machine-readable code, unique within the catalog scope.                       |
| `order`                  | `Int!`                                                                                                              | The display order within the same level or category.                            |
| `catalog`                | [Catalog](/docs/navixy-repository-api/core-api-reference/catalogs/catalog-items.md#catalog)!                        | The catalog this item belongs to.                                               |
| `organization`           | [Organization](/docs/navixy-repository-api/core-api-reference/organizations.md#organization)                        | The organization that owns this item. Null for system items.                    |
| `meta`                   | [CatalogItemMeta](/docs/navixy-repository-api/core-api-reference/catalogs/catalog-items.md#type-catalogitemmeta)!   | Metadata about this item including description, origin, and display properties. |
| `uuidDiscriminator`      | `String!`                                                                                                           | The 4-character code embedded in UUIDs for entities of this type.               |
| `isCustomizable`         | `Boolean!`                                                                                                          | Whether entities of this type support custom fields.                            |
| `customFieldDefinitions` | \[[CustomFieldDefinition](/docs/navixy-repository-api/core-api-reference/custom-fields.md#customfielddefinition)!]! | Custom field definitions for entities of this type, ordered by display order.   |

***

### Country

A country reference data item.

**Implements:** [CatalogItem](/docs/navixy-repository-api/core-api-reference/catalogs/catalog-items.md#type-catalogitem), [Node](/docs/navixy-repository-api/core-api-reference/common.md#node), [Versioned](/docs/navixy-repository-api/core-api-reference/common.md#versioned), [Titled](/docs/navixy-repository-api/core-api-reference/common.md#titled)

| Field          | Type                                                                                                              | Description                                                                     |
| -------------- | ----------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------- |
| `id`           | `ID!`                                                                                                             | A globally unique identifier.                                                   |
| `version`      | `Int!`                                                                                                            | The version number for optimistic locking.                                      |
| `title`        | `String!`                                                                                                         | The human-readable display name. Can be localized.                              |
| `code`         | `Code!`                                                                                                           | A machine-readable code, unique within the catalog scope.                       |
| `order`        | `Int!`                                                                                                            | The display order within the same level or category.                            |
| `catalog`      | [Catalog](/docs/navixy-repository-api/core-api-reference/catalogs/catalog-items.md#catalog)!                      | The catalog this item belongs to.                                               |
| `organization` | [Organization](/docs/navixy-repository-api/core-api-reference/organizations.md#organization)                      | The organization that owns this item. Null for system items.                    |
| `meta`         | [CatalogItemMeta](/docs/navixy-repository-api/core-api-reference/catalogs/catalog-items.md#type-catalogitemmeta)! | Metadata about this item including description, origin, and display properties. |
| `alpha2Code`   | `CountryCode!`                                                                                                    | The [ISO 3166](https://www.iso.org/standard/3166.html)-1 alpha-2 country code.  |

***


---

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