# Architecture functional layers

## Functional view

*Image, functional layers overview* ![Functional Layers Overview](https://824268196-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Mf3CXew4gGGjSc82zik%2Fuploads%2Fgit-blob-7857af98070ab741fa012a7eb21f92ffb07edbc6%2Ffunctional-layers-overview.png?alt=media)

### Starting architecture

The Functional view shows an overview of the most important functions of the system. The two images below show the starting architecture and functional reference architecture respectively.

*Image, functional starting architecture* ![Functional Starting Architecture](https://824268196-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Mf3CXew4gGGjSc82zik%2Fuploads%2Fgit-blob-ce26657b0cc225c776a7d2ce21288c2add1d6852%2Ffunctional-starting-architecture.png?alt=media)

1. Web applications
2. Open Smart Grid Platform
3. Web services
4. Basic functions
5. Database
6. Communication infrastructure (CDMA/GPRS/Ethernet)
7. IP infrastructure
8. Open Street Light Protocol (OSLP)
9. Public Street Lighting Device (PSLD) or Sub Station Lighting Device (SSLD)

## Functional Reference

This model partitions the system in seven functional clusters (vertically) which are shown on the system layers (horizontally). The circled numbers refer to image 1.

*Image, functional reference architecture* ![Functional Reference Architecture](https://824268196-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Mf3CXew4gGGjSc82zik%2Fuploads%2Fgit-blob-f853fdfcc23cceb12118515e7b7eb0a71c59730a%2Ffunctional-reference-architecture.png?alt=media)

Vertical clusters:

* Device installation
* Device management
* Firmware management
* Configuration management
* Schedule management
* Ad-hoc control and status
* Monitoring

Horizontal System layers:

* Web applications
* HTTPS/SOAP communication
* Platform
* Open protocols
* Smart devices


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://grid-exchange-fabric.gitbook.io/gxf/architecture/functionallayersoverview.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.