# beOS Pro Application Chart Structure

The beOS Pro Application Chart is built upon the structure of **Helm Chart**, with extensions to accommodate specific **beOS Pro** information. A standard application chart contains the following files:
```
|-- Chart.yaml                   # chart metadata
|-- beOS ProManifest.yaml          # beOS Pro Application configuration
|-- templates/                   # chart deployment template files
|   |-- deployment.yaml          # APP deployment script
|-- crds/                        # OPTIONAL: Custom Resource Definitions
|-- values.yaml                  # OPTIONAL: The default deployment parameters for this chart
|-- values.schema.json           # OPTIONAL: A JSON Schema for imposing a structure on the values.yaml file
|-- README.md                    # OPTIONAL: A human-readable README file
```
:::info NOTE
To make the templates directory easier to understand, you can split the deployment into several files.
:::

- A typical application chart for `App` and `Middleware`:
```
AppName
|-- Chart.yaml                # Required: YAML file containing chart metadata
|-- beOS ProManifest.yaml     # Required: containing App configuration
|-- values.yaml               # Required: default configuration values of the chart
|-- templates                 # Required: template directory, when combined with values, it can generate valid Kubernetes manifest files
|   |-- NOTES.txt             # Optional: plain text file containing brief usage instructions
|   |-- deployment.yaml       # Defines the deployment for App installation
|   |-- service.yaml          # Defines the Service that provides the Entrance for the App
|   |-- provider.yaml         # Optional: if you need to expose the Provider API 
|-- LICENSE                   # Optional: plain text file containing the chart license
|-- README.md                 # Optional: readable README file
```

- A typical application chart for `Recommend`:

```
RecommendName
|-- Chart.yaml                # Required: YAML file containing chart metadata
|-- beOS ProManifest.yaml     # Required: containing Recommend configuration
|-- values.yaml               # Required: default configuration values of the chart
|-- templates                 # Required: template directory, when combined with values, it can generate valid Kubernetes manifest files
|   |-- NOTES.txt             # Optional: plain text file containing brief usage instructions
|   |-- train.yaml            # Defines the train process in recommend workflows
|   |-- prerank.yaml          # Defines the prerank process in recommend workflows
|   |-- rank.yaml             # Defines the rank process in recommend workflows
|   |-- embedding.yaml        # Defines the embedding process in recommend workflows
|-- LICENSE                   # Optional: plain text file containing the chart license
|-- README.md                 # Optional: readable README file
```