Magnolia allows to reuse configuration items with JCR and with YAML.

include mechanism in YAML files

Instead of adding a list item or a value of a map entry you can include a file.

Use the Magnolia !include directive to add a reusable YAML chunk. Include a fragment on a sub-level of your definition. Reference the file you include by its resource path starting with /<module-name>/.

  label: Example page properties
    - name: tabText
      label: Texts and categories
        - name: title
          class: info.magnolia.ui.form.field.definition.TextFieldDefinition
          label: Title and categories
          i18n: true
        # an include within a list, here adding a field
        - !include /documentation-examples-templates/includes/categorization-field.yaml
# an include within a map, here adding a tab
actions: !include /documentation-examples-templates/includes/default-actions-block.yaml

The !include directive is Magnolia specific. The ! is a special character in YAML for a non-specific tag, see

If you have created the includable fragment after the creation of the file which includes it, save the latter again to force the YAML parser to properly register the definition. /<module-name>/includes is the recommended directory for YAML fragment files. Avoid adding the YAML fragment files into the following directories: apps, blocks, decorationsdialogs, i18nmessageViewsrenderers, templates and virtualUriMappings.

(warning) With Magnolia 5.5.6+, the !include directive has been extended to provide more functionalities. (See YAML inherit and include).

extends mechanism in JCR node based configuration

You can extend a configuration by defining an extends property and setting its value to the source configuration you want it to inherit. The target configuration inherits everything from the source and adds its own exceptions. This can save time and effort as you only need to define exceptions explicitly. The mechanism is only available in the config repository. In the example below, the sportstation site definition extends the travelsite definition.

Node nameValue



















The definition inherits all configuration from the default configuration and adds its own domains, internationalization and URI-to-repository mappings. The extends property can point to the source configuration with an absolute or relative path.

Example: Generic tabs in dialogs

You can use Magnolia's extends mechanism to minimize configuration. For example, if you have a number of components that include an image, you can configure a generic image tab and use it by extension in all relevant dialogs.

This example configuration shows the use of a generic imageTab in a TextImage dialog.

Node nameValue










































Path to the configuration that is extended.

Example: Extending JCR node based template definitions

You can configure one template in full and create as many extensions with slight differences as you like. The mechanism is used to minimize configuration. Only changes, exceptions and additions are configured in the extended configuration. All other configurations are taken from the original configuration.

The extends property has two possible values:

  • </path to extended template>: Used to reference the template that is extended.
  • override: Used to override a portion or part of the configuration that is extended.

In the example below page-template-2 extends page-template-1. The extended template uses the full configuration of the template it extends except the configurations in the extended template.

Node nameValue






















Extended Template
#trackbackRdf ($trackbackUtils.getContentIdentifier($page) $page.title $trackbackUtils.getPingUrl($page))