# Pass Intraday Data to Transformer Core

## Outputting Data to Transformer

### charts-prefix

Prefix for subjects that the Charting blade will provide data for. See [here](../../../caplin-trader/3/chart/chart-architectural-overview3.md) for more information on charting, and where the Charting blade fits in with the Caplin component stack.

Default value: /CHARTS

Example:

```
charts-prefix  /CHARTS/
```

There is generally no need to change this configuration option; the Caplin Trader charting library will always request charts using the /CHARTS prefix.

## Debugging

### log-level

Determines the errors and events that are reported to the _transformer.log_ log file when Caplin Transformer is operating. Acceptable values are shown in Table '**Log Levels**' below.

Default value: INFO

**Log levels**

| Value | Description |
| --- | --- |
| DEBUG  | Reports all errors and events. |
| INFO  | Reports events and information regarding normal operation and all errors included in the WARN, NOTIFY, ERROR and CRIT debug levels. |
| WARN | Reports minor errors and all errors included in the NOTIFY, ERROR and CRIT debug levels. |
| NOTIFY | Report errors regarding data corruptions and all errors included in the ERROR and CRIT debug levels. |
| ERROR | Reports serious errors regarding network connections and all errors included in the CRIT debug level. |
| CRIT | Reports critical errors that prevent DataSource for Triarch running. |

## Logging

### log-file

Name of file to write debug messages to.

Default value: charting.log