# Metadata Merger Tool

Metadata Merger Tool is a new feature added in the Aristotle registry to support harmonization of metadata. This tool is useful for merging metadata at the ‘Audit and Harmonisation’ phase of MAST Methodology. Administrator permissions are needed to use the metadata merger tool.

### Sources required to execute Merging of metadata:

* **Source Metadata:** It is the metadata to be merged to the target metadata. All the links associated with the source metadata will be linked to the target metadata after the merge.
* **Target Metadata**: It is the metadata to which other metadata gets merged. The merger tool will remove all the linkages from source metadata and will create the same with the target metadata in addition to the linkages it already has.

### Functionality of the merger tool:

* **Merging Metadata:** Metadata items of the same metadata item type (object class, data element, data element concept etc.), can be merged using 'sources' and 'targets'. This will remove all the metadata linkages from the source metadata and will add them to the target metadata. This change will be reflected in all the levels of the registry.
* **Undo feature:** The merger tool can undo a merge at any time. Once the merge rule has been created and executed, you can undo it by clicking the undo button.
* **Creating rules:** The merger tool allows users to create rules that can be saved for later implementation.

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