EEA Similarity is a Plone add-on which provides content suggestions based on similarity scores to a search string. It uses NLP algorithms like TF-IDF (frequency–inverse document frequency) and LSI (Latent Semantic Indexing).

Initial use case is to provide a list of possible duplicates when adding content (based on the entered title).

If you are using zc.buildout and the plone.recipe.zope2instance recipe to manage your project, you can do this:

• Update your buildout.cfg file:

  • Add eea.similarity to the list of eggs to install
  • Tell the plone.recipe.zope2instance recipe to install a ZCML slug

  [instance]
  ...
  eggs =
    ...
    eea.similarity
  
  zcml =
    ...
    eea.similarity

• Re-run buildout, e.g. with:

  $ ./bin/buildout

You can skip the ZCML slug if you are going to explicitly include the package from another package's configure.zcml file.

1. Go to Site Setup > Add-ons and install EEA Similarity
2. Create IDF index by calling @@create_idf_index Browser view on site root. If you have plone.app.async installed, it will add a daily job to async queue, otherwise you'll have to setup an external cron job to call this periodically.
3. Customize settings via Site Setup > EEA Similarity Settings

EEA Similarity has the following dependencies:

• stemming
• gensim (which in turn depends on numpy and scipy)

On CentOS you need to install:

• blas-devel
• lapack-devel
• gcc-fortran

On Debian/Ubuntu you need to install:

• libblas-dev
• liblapack
• gfortran

Due to a bug in scipy, it is possible that the packages will not install when running buildout. There are two solutions/options:

1. Install them with easy_install pip before running the buildout.
2. Update zc.buildout to version 2.9.0 and activate the wheel support via buildout.wheel and the dependencies will be installed normally.

• EEA on Github

The Initial Owner of the Original Code is European Environment Agency (EEA). All Rights Reserved.

The EEA Similarity (the Original Code) is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

More details in License.txt

EEA - European Environment Agency (EU)