> For the complete documentation index, see [llms.txt](https://docs.meterian.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.meterian.io/the-meterian-webapp/the-web-dashboard-1/policies.md).

# 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 policies screen](/files/KsLUeINvQVhvRLUt3iUC)

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:

<figure><img src="/files/JPoh3UDBpawAgvrrVPf8" alt=""><figcaption></figcaption></figure>