# 2025-03-21: Sequential ID Service - siteCode query param

## Overview

Query param `siteCode` has been added to endpoints responsible for generating next ids. The `siteCode` is used to resolve certain placeholders. Placeholders such as `__year__`, `__month__`, `__day__`, `__hour__`, `__minute__`, `__second__` and `__country__`, which are defined in the schema, can have some default values computed when their counterparts are missing in the request body. The default values are derived from the site. Specifically:

* All date-related placeholders are computed based on the `site.homeBase.timezone` field.
* The country placeholder is replaced with the value of the `site.homeBase.address.country` field.

If these values are missing in a site configuration, the following defaults are used:

* `UTC` for timezone
* `DE` for country

## Updated endpoints

| Endpoint                                                                                                                                                                                                              | Description                   |
| --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------- |
| [Creating a nextId](https://developer.emporix.io/api-references/api-guides/utilities/sequential-id/api-reference/sequential-ids-management#post-sequential-id-sequenceschemas-sequenceschema-nextids)                 | Query param `siteCode` added. |
| [Creating a nextId for schema type](https://developer.emporix.io/api-references/api-guides/utilities/sequential-id/api-reference/sequential-ids-management#post-sequential-id-tenant-schemas-types-schematype-nextid) | Query param `siteCode` added. |
| [Creating a nextId for schema types](https://developer.emporix.io/api-references/api-guides/utilities/sequential-id/api-reference/sequential-ids-management#post-sequential-id-sequenceschemabatch-nextids)           | Query param `siteCode` added. |

## Known problems

There are no known problems.