Technical Team/Use Cases/2.0/Contributor makes commit subject to existing SPDX data of project

1. Title: Committer assents to SPDX data of upstream project
2. Primary Actor: Committer
3. Goal in Context: To indicate their commit accepts existing SPDX data for the upstream project.
4. Stakeholders and Interests: 
   1. Committer: 
      1. To communicate that their commit is licensed in alignment with the SPDX data for the upstream project.
   2. Upstream maintainers: 
      1. To be able to document the license information for the commits they receive
      2. To communicate the licensing information for their copyrightable artifacts.  
      3. To have their licenses respected
   3. Consumers of upstream source:
      1. To receive accurate and clear information of licensing of upstream source
      2. To be able to comply easily with licenses for upstream source
      3. To be able to subset, extend, or aggregate artifacts and pass on clear authoritative verifiable license for the resulting new copyrightable artifacts.
5. Preconditions: 
   1. Committer has decided to accept the licensing for the upstream project
   2. The Upstream Maintainer is providing SPDX data for the upstream project.
6. Main Success Senario: Committer communicates that they are agreeing to the SPDX data for the project applying to their commit.
7. Failed End Condition: Committer communicates inaccurate incomplete licensing information for their package.
8. Trigger:
   1. Commit of code to an upstream project.
9. Notes: