Chapter 2. The Debian Archive

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Derived Works The license must allow modifications and derived works, and must allow

them to be distributed under the same terms as the license of the original software.

Integrity of The Author's Source Code The license may restrict source code from being dis 

tributed in modified form only if the license allows the distribution of  patch files  with

the source code for the purpose of modifying the program at build time. The license

must explicitly permit distribution of software built from modified source code. The li 

cense may require derived works to carry a different name or version number from the

original software. (This is a compromise. The Debian Project encourages all authors to

not restrict any files, source or binary, from being modified.)

No Discrimination Against Persons or Groups The license must not discriminate against any

person or group of persons.

No Discrimination Against Fields of Endeavor The license must not restrict anyone from

making use of the program in a specific field of endeavor. For example, it may not restrict

the program from being used in a business, or from being used for genetic research.

Distribution of License The rights attached to the program must apply to all to whom the

program is redistributed without the need for execution of an additional license by those

parties.

License Must Not Be Specific to Debian The rights attached to the program must not depend

on the program's being part of a Debian system. If the program is extracted from Debian

and used or distributed without Debian but otherwise within the terms of the program's

license, all parties to whom the program is redistributed must have the same rights as

those that are granted in conjunction with the Debian system.

License Must Not Contaminate Other Software The license must not place restrictions on

other software that is distributed along with the licensed software. For example, the

license must not insist that all other programs distributed on the same medium must be

free software.

Example Licenses The  GPL,   BSD,  and  Artistic  licenses are examples of licenses that we

consider free.

2.2 Sections

2.2.1 The main section

Every package in main and non US/main must comply with the DFSG (Debian Free Software

Guidelines).

In addition, the packages in main

  must not require a package outside of main for compilation or execution (thus, the pack 

age must not declare a  Depends ,  Recommends , or  Build Depends  relationship on

a non main package),