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Reciprocal (module for Omeka S)

New versions of this module and support for Omeka S version 3.0 and above are available on GitLab, which seems to respect users and privacy better than the previous repository.

Reciprocal is a module for Omeka S that allows to update automatically the linked resources with the reciprocal value in the reciprocal property.

For example, when the property "Dublin Core : Is Part Of" of the item Alpha is filled with the value "item Beta", a value "item Alpha" is added to the item Beta in the property "Dublin Core : Has Part". When the value is removed, the reciprocal value is removed too.

The list of the most common reciprocal properties is ready for the default ontologies and can be updated for any new ontology.


This optional module Generic may be installed first.

See general end user documentation for installing a module.

  • From the zip

Download the last release from the list of releases, and uncompress it in the modules directory.

  • From the source and for development

If the module was installed from the source, rename the name of the folder of the module to Reciprocal.


Simply fill the list of the reciprocal properties in the config of the module.

To update all existing resources, simply run a batch edit on all resources.

Warning: The linked resource is updated only if the user has the right to update it. No change is done on the linked resource else.


Use it at your own risk.

It’s always recommended to backup your files and your databases and to check your archives regularly so you can roll back if needed.


See online issues on the module issues page on GitLab.


This module is published under the CeCILL v2.1 license, compatible with GNU/GPL and approved by FSF and OSI.

In consideration of access to the source code and the rights to copy, modify and redistribute granted by the license, users are provided only with a limited warranty and the software’s author, the holder of the economic rights, and the successive licensors only have limited liability.

In this respect, the risks associated with loading, using, modifying and/or developing or reproducing the software by the user are brought to the user’s attention, given its Free Software status, which may make it complicated to use, with the result that its use is reserved for developers and experienced professionals having in-depth computer knowledge. Users are therefore encouraged to load and test the suitability of the software as regards their requirements in conditions enabling the security of their systems and/or data to be ensured and, more generally, to use and operate it in the same conditions of security. This Agreement may be freely reproduced and published, provided it is not altered, and that no provisions are either added or removed herefrom.


  • Copyright Daniel Berthereau, 2020-2022 (see Daniel-KM on GitLab)

These features are built for the future digital library Manioc of the Université des Antilles and Université de la Guyane, currently managed with Greenstone.


Module for Omeka S that adds the reciprocal value in the reciprocal property of a linked resource








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