An open source entrepreneur has to published a new 'Honest Public Licence' (HPL) that aims to close loopholes which let firms offering hosted applications escape key stipulations of the General Public Licence (GPL).

Fabrizio Capobianco published details of the proposed licence on his blog on Monday, and a first draft will be shared with the Free Software Foundation this week. 

Capobianco in the next month is solliciting feedback about this proposed changes and expects that his The HPL license over time will be folded into the forthcoming GPL version 3.

Capobianco is chief executive of Funambol, a company developing an open source alternative to Microsoft's ActiveSync application that does push email and synchronises data between computers and mobile devices.

The GPL is the most popular open source licence and governs the Linux operating system among others. It requires developers who distribute GPL-compliant code to publish the code for any adjustments they have made to the application.

Hosted providers offering applications such as Salesforce.com and Google's Gmail deliver a service but do not distribute any code. The code-sharing provision does not therefore apply to such providers. 

The loophole affects all kinds of applications that can be hosted, ranging from middleware like the Apache web server and Jboss application servers to enterprise software such as the SugarCRM suite.

A provider could, for instance, start offering a tweaked, hosted version of the SugarCRM enterprise suite without having to disclose its source code.

The HPL seeks to close that loophole by adding a single clause to the current GPL version 2 requiring application service providers to publish their source code. 

The GPL is based on the ideals of sharing source code as a way of paying back society for the free software.

But Capobianco claims that application service providers have been able to dodge their responsibilities owing to a technicality in the GPL licence.