A placeholder is a specific value that is resolved at runtime against a property available in the property file set at component level. It is mainly used in the service unit JBI descriptor to be able to configure your service providers and/or your service consumers.

If no property with name '{{placeholder-name}}' exists in the component property file, the default value '{{default-value}}' is used. If no default value is defined, the literal value '{{$\{placeholder-name}\}}' is used.