# Domain Metadata
* Domain metadata file stores configuration settings and parameters external to the source code, enabling easy modification and customization of an application without code changes.
* This makes it easier to adapt the application to different environments such as development, testing, production, etc.
* For security reasons, sensitive information such as passwords, API keys, and credentials should not be hard-coded in the functions. Externalizing these values into Domain metadata files allows for more secure handling of sensitive data.
* Trillo Workbench does not enforce any shcema or type. You can use XML, JSON, text, HTML etc. files as appropriate.
**Example:**
* Create a file under Metadata File > files.
* Name the file - configDev.json(for dev), configQa.json(for QA), config.json (for PROD).
* Add properties in the configDev.json file and click on save.
* We can reference the config file from any functions using the below code -
```java
String configFile = parameters.get("configFile")
Map configs =
MetaApi.getDomainFileAsMap("shared/domainMeta/files/" + configFile);
```
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