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A mini language for reuse of information

Project description

This product establishes a “mini language” for the calculation and re-use of information from Plone instances during the processing of a single request, e.g. when creating breadcrumbs; e.g., if the login state is important for the breadcrumb for /foo, that same state might be important for the /foo/bar breadcrumb as well.

It is part of the footing of the “Unitracc family” of Plone sites which are maintained by visaplan GmbH, Bochum, Germany; the mini-language was established during the development of the now factored-out package visaplan.plone.breadcrumbs.

The purpose of this package (for now) is not to provide new functionality but to factor out existing functionality from our former monolithic Zope product. Thus, it is more likely to lose functionality during further development (as parts of it will be forked out into their own packages, or some functionality may even become obsolete because there are better alternatives in standard Plone components).


  • The info dictionary holds the collected information of interest during processing of the request.

  • The hub dictionary holds the tools which were used to get those information chunks.

    • For now, some of those tools are quite proprietary adapters or browsers, usually now factored out to the visaplan.plone.adapters and visaplan.plone.browsers packages, respectively.

      This is not ideal, and it will change; we’d rather depend directly on standard Plone tools and/or the plone.api instead.


This add-on can be seen in action at the following sites:


Full documentation for end users can be found in the “docs” folder.


Install visaplan.plone.infohubs by adding it to your buildout:



eggs =

and then running bin/buildout


If you are having issues, please let us know; please use the issue tracker mentioned above.


The project is licensed under the GPLv2.



1.0.dev2 (unreleased)

  • helper function context_and_form_tuple [tobiasherp]

1.0.dev1 (unreleased)

  • Initial release. [tobiasherp]

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