> For the complete documentation index, see [llms.txt](https://docs.eximee.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.eximee.com/documentation/documentation-en/budowanie-aplikacji/model-danych/bazy-projekcji-low-code.md).

# Low-code projection databases

#### Introduction: What is a Low-Code projection database?

Low-code projection database (*Eximee Registry*) is an internal mechanism of the Eximee platform that allows storing and transferring data between different instances of the same application or between multiple separate low-code applications. It works like a shared information clipboard, which a low-coder can independently manage from Eximee Designer using simple scripts (ScriptCode).

#### What is this mechanism used for?

This tool was created so that applications built in low-code can easily share knowledge about current matters without the need to create heavy, developer-oriented backend integrations. Thanks to this, the low-code layer gains full independence in managing the state of its processes.

In practice, a low-coder uses the projection database to:

* **Aggregating context split across many cases:** Storing relationships between different low-code applications, for example a list of loans currently being applied for under the client's PESEL number
* **Addressing incoming data:** Storing pairs *external identifier*:*internal identifier* that allow you to optimally find the case to which an event from Kafka or MQ should be passed

#### What do projection databases give Low-Coders?

The most important benefits that projection databases give Low-Coders:

1. **No need to involve programmers:** As a Low-Coder, you can independently save data outside the context of a single application, fully managing the data structure.
2. **Fast access to data:** From Low-Code, you can quickly find the data set you need. You have full control over the search key.
3. **Isolation and dedicated scope:** Thanks to dividing projection databases into namespaces (*namespace*) you can work comfortably without affecting other teams. You can share namespaces to exchange information with other applications, but you do not have to.

#### How to use the Projection Database in ScriptCode?

Access to the projection database (*Eximee Registry*) is provided directly from each ScriptCode script run in the context of a form (e.g. in validators, page services, EntryService or ExitService), at the level of handling automatic process tasks or Kafka/MQ event consumers. You perform all operations using the built-in interface `api.registry`

{% content-ref url="/pages/bfa9e20b47c7332fc92e76cf3a0ef3663deaaee5" %}
[Managing projection databases (Registry)](/documentation/documentation-en/budowanie-aplikacji/logika-biznesowa/scriptcode/script-code-bazy-projekcji.md)
{% endcontent-ref %}


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