1. Read on Licenses libraries
    1. GPL podes usar biblioteca proprietaria
  2. Licensable items
    1. Source Code
      1. Made from other software
    2. Object Code
    3. Libraries
      1. Write library from library
      2. Write software that uses library
    4. Plug-ins
      1. Write plugin from software
      2. Indepedent
    5. Subclasses
    6. Interpreter
    7. Compiler
  3. Examples
  4. ... created from scratch.
    1. Does not retain authorship (non-attribution)
      1. Public Domain - No copyright
    2. Retain authorship (attribution)
      1. Available to community?
        1. Free/opensource license
          1. Open to everyone
          2. Copyleft
          3. GNU-GPL
          4. EUPL
          5. Sharealike
          6. Weak Copyleft
          7. Mozzila
          8. CDDL
          9. Eclipse Public License
          10. LGPL
          11. Non-Copyleft
          12. BSD
          13. MIT
          14. Apache 2.0
      2. Only available to specific partners (paying or not)?
        1. Proprietary License
      3. Available to community but want returns for certain commercial apps
        1. Multilicensing
          1. Free/opensource
          2. Proprietary
  5. ... created in connection with previous software which...
    1. ... is in the public domain.
    2. ... is licensed but does not include copyleft.
      1. Does not retain authorship (non-attribution)
        1. Public Domain - No copyright
      2. Retain authorship (attribution)
        1. Available to community?
          1. Free/opensource license
          2. Open to everyone
          3. Copyleft
          4. GNU-GPL
          5. EUPL
          6. Sharealike
          7. Weak Copyleft
          8. Mozzila
          9. CDDL
          10. Eclipse Public License
          11. Non-Copyleft
          12. BSD
          13. MIT
          14. Apache 2.0
        2. Only available to specific partners (paying or not)?
          1. Proprietary License
        3. Available to community but want returns for certain commercial apps
          1. Multilicensing
          2. Free/opensource
          3. Proprietary
    3. ... includes copyleft/weak copyleft. It is...
      1. ....application source code/object code...
        1. ... created from previous copyleft code.
          1. Copyleft obligation
        2. ... which uses a licensed library.
          1. Library license is copyleft (ex: GPL)
          2. Copyleft obligation
          3. Library license is weak copyleft (ex: LGPL)
          4. Program can be licensed as free/opensource or proprietary
          5. Library license is proprietary
          6. Program can not be licensed as copyleft
      2. ...a plugin...
        1. ... created for...
          1. ...a proprietary program
          2. Does the plug-in link dynamically to program?
          3. Cannot license plug-in with copyleft
          4. Is plug in a separate program?
          5. Can license plug-in with copyleft
          6. ...a copyleft program
          7. Does the plug-in link dynamically to program?
          8. Copyleft obligation
          9. Is plug-in a separate program?
          10. No Copyleft obligation
        2. ... created from...
          1. ... a copyleft program
          2. Copyleft obligation
      3. ...a library.
        1. Created a new library from a copyleft library
          1. Copyleft obligation
        2. Can GPL libraries be used by non GPL programs?
      4. ...a subclass.
        1. Class has copyleft
          1. Copyleft obligation
      5. ...a compiler.
        1. Using a compiler does not affect the program license
        2. Created compiler from copyleft compiler
          1. Copyleft obligation
      6. ...an interpreter.
        1. Using an interpreter does not affect the program license
        2. The interpreter links dynamically to a library
          1. Library is licensed under copyleft
          2. Copyleft obligation
          3. Library is not licensed under copyleft
          4. Free to lincense