Documentation/4.2/Extensions/CatalogPolicies

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Home < Documentation < 4.2 < Extensions < CatalogPolicies

For the latest Slicer documentation, visit the 4.10 page.

Extensions in the Extension manager.

An extension could be seen as a delivery package bundling together one or more Slicer modules. After installing an extension, the associated modules will be presented to the user as built-in ones

The Slicer community maintains a website referred to as the Slicer Extensions Catalog to support finding, downloading and installing of extensions. Access to this website is integral to Slicer and facilitated by the Extensions Manager functionality built into the distributed program.

The Catalog classifies extensions into three levels of compliance:

  1. Category 1: Fully compliant Slicer Extensions: Slicer license, open source, maintained.
  2. Category 2: Open source, contact exists.
  3. Category 3: All other extensions (work in progress, beta, closed source etc).

To publish extensions, developers should consider reading the following pages:


Disclaimer

This is work in progress as of April 2012 - people with an interest in policies and practice related to this topic should contact Ron Kikinis.

The following text details the policies for Slicer Extensions. These policies are subject to change without notice at the discretion of the Slicer PI. It is expected that this will happen rarely and after consultation with the Slicer community.

Requirements for Category 1 Slicer Extensions

Category 1 extensions must meet the following conditions:

Requirements for Category 2 Slicer Extensions

Category 2 extensions must meet the following conditions:

  • be available under a compatible open source license
  • have a designated maintainer to respond to questions about the extension
  • have a clear declaration about the license under which the code is distributed

Category 3 Slicer Extensions

Category 3 Slicer Extensions cover everything else, including developers who do not want to share their source code or extensions.

  • I do not want to share my source code: When source code is not shared, it is not possible to inspect the code for malicious content. This is a potential security risk that we will not accept for the Slicer website.
  • Developers are free to set up their own Midas servers for hosting extensions if they want to host category 3 extensions, or can just make .tar.gz files and set the module path in Slicer manually.