• Derived Works: the license must allow modifications and derived works. it must allow them to be distrubuted under the same terms as the license of the original softeware.
  
  
• Integrity of Authore's source code: the intergrity of Authore's source code must be maintained. the license may required drived works to carry a different name or version number from the original software.
  
  
• No discrimination against persons or groups: A license must not discriminate against any persons or groups of persons.
  
  
• No discriminaton against Feild of Endeavour:The license must not restrict any one from making use of the programme in a specific feild of endeavour.For exampel,it may not restrict from being used in a business or for genetic research.
  
  
• Distributoin of license:The right attached to the programe must apply to all.The program has to be redistrubuted without the need for execution of an additional license by those parties.
  
  
• license must not specific to a product:All parties to whom an extracted programme is redistrubuted to, should have the same rights as those who obtained the original softeware disribution.
  
  
• license must not restrict other software:the license must not place restrictions on another soft ware that is distributed along along with the licensed soft ware. For example ,the licensed must not insist that all other programes distrubuted on the same medium must be opend force software.
  
  

• license must be tecnology-neutral:No provisoin of the license may be depend on any individual tecnology or style of intet face.

FREE AND OPEN SOURECES SOFT WARE (FOSS)

Type of software that is both free and open - sourse soft ware is called Foss.The terms of license for this type of software allow it to be freely used , coppied , studied and modifeid , and the source code is openly shared so that people are encouraged to improve and debuge the soft ware.

OPEN SOURCE LICENSE

Open- source licensing encourages collaborative participation by allowing third parties to study , use , easily modified , and redistribute the source code.

These licences can be classified into to catagories namely , permissiv licence and copyleft licences.

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