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LEOS - Open Source software for editing legislation

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LEOS Prototype v1.0.0

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LEOS prototype enables to create and draft legislative documents via a web user interface. Document's content is stored in an XML format, currently Akoma Ntoso V2. The prototype implements use cases based on acts issued by the European Commission (proposals for a directive, regulation...) but it can be extended to support other legislative tradition.
  • creation of an act from a template
  • management of higher divisions with drag and drop (chapters, sections...)
  • wysiwyg edition of article content (paragraphs, alineas, points...)
  • versioning and comparison of versions
  • several users editing an act at the same time
  • generation of human readable view (HTML, pdf)


  • Akoma Ntoso V2 XML format
  • CMIS 1.1 repository interface
  • Java 7 and Vaadin 7
  • JavaScript and CKEditor 4.4
  • Open source Java and JavaScript libraries

Please see the README file included in the release to learn how to compile and run the project on your local machine without external dependencies.


eGovernment, Law




Type: Interoperability Solution
Solution category:
Solution type:
Public Policy
Under development
Date of creation:
27 Jul 2015 - 17:26
Date of last modification:
30 Jul 2015 - 11:23