Skip to main content

A package that suggests similar titles to one being added

Project description

develop master


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:

    eggs =
    zcml =
  • 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.

Getting started

  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 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

Possible issues with scipy and numpy:

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.

Source code


EEA - European Environment Agency (EU)


2.2 - (2019-01-28)

  • Jenkins: Add sonarqube step [avoinea refs #101552]

2.1 - (2018-08-27)

  • Change: Get base-url from body data base-url [avoinea refs #97843]

2.0 - (2018-07-16)

  • Change: Use logger.warn for expected exceptions [avoinea refs #96835]

  • Change: updated URLs pointing to with https:// [alecghica refs #95849]

1.9 - (2017-12-12)

  • Change: Replace eeacms/zptlint with eeacms/plone-test:4 zptlint [avoinea refs #90415]

1.8 - (2017-09-26)

  • bugfix in javascript [valipod refs #88020]

1.7 - (2017-09-15)

  • bugfix in javascript [valipod refs #88020]

1.6 - (2017-08-16)

  • Upgrade step: Within “Plone > Site setup > Add-ons” click on upgrade button available for EEA Similarity [valipod refs #84915]

  • the similarity check is now available on edit pages [valipod refs #85448]

  • the similarity threshold can be passed as parameter [valipod refs #85448]

  • added possibility to turn on check for all content types [valipod refs #85448]

  • button to request the similarity check manually [valipod refs #85448]

  • suggest popup appears even if there are now suggestions (different message) [valipod refs #85448]

  • integrated the suggest popup also for indicators aggregated edit [valipod refs #85448]

1.5 - (2017-05-22)

  • Upgrade step: Within “Plone > Site setup > Add-ons” click on upgrade button available for EEA Similarity [avoinea refs #84915]

  • Change: Add dedicated async quota for similarity jobs [avoinea refs #84915]

  • Change: fixed PyLint warnings and errors [valipod refs #84949]

1.4 - (2017-04-24)

  • Feature: add control panel option to show suggestions only after a certain title length [valipod refs #84480]

  • Change: updated package information [eduard-fironda]

1.3 - (2017-04-19)

  • Bug fix: fixed issue with the equivalent sets [valipod refs #84294]

  • Feature: added metadata info to the suggestion dialog [valipod refs #84294]

1.2 - (2017-04-14)

  • Bug fix: Remove hard dependency on and eea.versions [avoinea refs #83163]

  • Bug fix: removed hard coded path in the dialog’s javascript [valipod refs #83163]

  • Bug fix: added some defaults to the control panel settings [valipod refs #83163]

  • Bug fix: removed mandatory status for some control panel settings [valipod refs #83163]

1.1 - (2017-04-13)

  • Bug fix: fixed README markup [alecghica refs #82296]

  • Upgrade step: trigger index generation once (/www/create_idf_index) Feature: added index update frequency to the registry settings [valipod refs #83163]

1.0 - (2017-04-12)

  • Feature: related to index and score:
    • moved the index creation to the async instance

    • add similarity score next to object link in dialog

    • [valipod refs #83163]

  • Feature: added to registry settings:
    • equivalent content types sets, use of stopwords, number of shown suggestions

    • max. score difference between suggestions, dialog title and text

    • [valipod refs #83163]

  • Pre-upgrade step: run etc/scripts/ on each backend [alecghica refs #82296]

  • Pre-upgrade step: run [alecghica refs #82296]

  • Upgrade step: from control panel instal eea.similarity [valipod refs #82296] [alecghica refs #82296]

  • Feature: Initial release [valipod refs #82296]

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution (64.9 kB view hashes)

Uploaded source

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Fastly Fastly CDN Google Google Object Storage and Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page