---json
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---
====== Meta Data Supplier ======


===== About =====

''meta'' is a [[docs:generator:data-supplier|data supplier]] that derives its value from input data resources (such as file name, …) in a [[:docs:flow:pipeline|pipeline]].


This data supplier:
  * is used in the [[:docs:op:enrich|enrich operation]]
  * to add a [[:docs:resource:virtual_column|virtual column]]
  * that contains a [[:docs:resource:attribute|data resource attribute]] value (such as the [[:docs:resource:name|file name]]).




===== Example =====

Example of [[:docs:generator:data-supplier|data supplier]] with the [[:docs:resource:name|resource name attribute]]
<file yml>
columns:
  - name: file_name
    data-supplier:
      type: meta
      arguments:
        attribute: name
</file>

===== Arguments =====






^ Argument ^ Default ^ Description ^
| ''attribute'' | Mandatory | A [[:docs:resource:attribute|data resource attribute]] |