LDRAW.ORG PARTS LIBRARY AGREEMENT: CAreadme.txt

1. Introduction

The following is the README text for the LDraw.org Parts Library
licensed by the Creative Commons Attribution License 2.0 (CC BY 2.0) and
Creative Commons Attribution License 4.0 International (CC BY 4.0)
as specified by the LDraw Contributor Agreement (CA).

However this document is not a license! It is simply a handy reference
for understanding the Legal Code (the full license), which can be
found in the CAlicense.txt file (CC BY 2.0) or CALicense4.txt (CC BY 4.0),
it is a human-readable expression of some key terms. Think of it as the
user-friendly interface to the Legal Code beneath. This text itself has no
legal value and its contents do not appear in the actual license. For a deeper
insight please visit:
http://creativecommons.org/licenses/by/2.0/
http://creativecommons.org/licenses/by/4.0/

Parts which fall under this agreement will contain one of the following lines in
the header:

Parts submitted/edited before 2023-03-05 where some (but not all) authors or 
editors have affirmed the new CA:
0 !LICENSE Licensed under CC BY 2.0 and CC BY 4.0 : see CAreadme.txt

Modifications of dual licensed parts:
All modifications to the original work will be listed in individual !HISTORY 
lines. For all !HISTORY lines dated before 2023-03-05, the modification is 
licensed under the CC BY 2.0 license. For all !HISTORY lines dated on or after 
2023-03-05, the modification is licensed under the CC BY 4.0 license

Parts submitted/edited on or after 2023-03-05 or
Parts submitted/edited before 2023-03-05 where all authors and editors have 
affirmed the new CA:
0 !LICENSE Licensed under CC BY 4.0 : see CAreadme.txt

Note:
The following line was originally used in the Parts Library and its use is
considered to be depreciated. "CCAL version 2.0" should be
read to mean CC BY 2.0.
0 !LICENSE Redistributable under CCAL version 2.0 : see CAreadme.txt


2. Rights

You are free:
  * To distribute, remix, adapt, and build upon the material in any
    medium or format, so long as attribution, as specified by the license,
    is given to the creator.
  * To make commercial use of the CA approved LDraw Parts Library

Given the following attribution is provided:
  1. Name the creator
  2. Provide a URL for the work
  3. Name the license
  4. Provide a URL for the license
  5. Note whether the work has been modified

Items 1-4 are provided by either the file itself or this document. Item 5 is 
your responsibility if you have modified the work.

Please read the following best practices article regarding attribution:
https://wiki.creativecommons.org/wiki/best_practices_for_attribution

4. Enforcements

The single copyright holders are the sole entity responsible for
enforcements of their copyrights. For purposes of enforcement
LDraw.org considers the following good rules of thumb to determine
if a new file is not a Derivative Work. Anything else should be
considered a Derivative work and an attribution would be required.
If in doubt, contact the current LDraw SteerCo.

What is not considered a Derivative work?

  * Rendered images generated from the LDraw library. Rendering here
    covers any conversion of a 3D model file into a 2D image.

  * Model files containing references only (the source code for the
    part may NOT be included in any form) to parts in the official
    LDraw Parts Library at the time of their creation. Part files
    which are marked as unofficial at the time of creation may be
    included in full in the model file. If the sole or main purpose (as
    determined by the LDraw SteerCo in consultation with the potentially
    offending author and the LDraw community at large) of the model file
    is to include large numbers of unofficial parts then it WILL be
    considered a derivative work.

  * Alternative libraries of parts which LDraw.org does not own or
    enforce the copyright. If some or more of the parts in the library
    are converted from the LDraw Parts Library then they must be
    considered a Derivative Work.