====== Relationship editor ======
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  * **Module**
<WRAP prewrap center>
<code>
cd ~/github/islandora
git clone git://github.com/giancarlobi/islandora_relationship_editor
mv islandora_relationship_editor /usr/share/v2p2demo2.to.cnr.it/sites/all/modules/islandora/
</code>
</WRAP>
  * **ARC2**
<WRAP prewrap center>
<code>
cd ~
wget https://codeload.github.com/semsol/arc2/zip/master
mv master arc2.zip
unzip arc2.zip
mv arc2-master arc2
mv arc2 /usr/share/v2p2demo2.to.cnr.it/sites/all/modules/islandora/islandora_relationship_editor/
</code>
</WRAP>
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Enable Islandora Relationship Editor from DRUPAL admin.
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Enable "Related objects" block from DRUPAL admin.