# Policies
In the Policies section is possible to create, modify or delete the policies related to the licenses of opensource components. Every policy can be associated with a set of projects using regular expressions or tags.
Every rule defines the licenses that are/are not allowed. The standard used is the SPDX, but specific extensions are provided for some proprietary licenses and specific licenses for some software producers.
The system already provides pre-compiled templates to manage some common cases:
* exclusion of all Copyleft licenses
* exclusions of all Affero licenses
* exclusions of all GPL licenses
## Structure of a policy
A policy contains a list of licenses, and can be of two different types:
* DENY: it will deny all licenses listed in the policy
* ALLOW: it will allow **only** the policies listed in the policy
All policies applicable to a project, based on tag or on matching, will be computed together. In case of a violation, the pollcy will be clearly indicated in the report:
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