LDraw.org Contributor Agreement

Version: 4.2 (23-Oct-04)

The License

By submitting work ("the Work") to The LDraw Organization ("LDraw.org"), the submitter ("the Author"), agrees to release the Work under the Creative Commons Attribution License version 2.0 ("the CCAL").

The human readable version of the CCAL can be found at this link:

The legal text of the CCAL can be found at this link:

For the purposes of this license The Work is define as the LDraw Parts Library (and all parts within it) which have fall under the LDRaw Contributor Agreement. These parts may be identified by the appearance of the following line in their header as placed their by the LDraw Library Administrators or the Original Author.

0 !LICENSE Redistributable under CCAL version 2.0 : see CAreadme.txt

The Author acknowledges that, provided LDraw.org follows the guidelines of the CCAL, the following rights are granted to LDraw.org via the CCAL:

  • Non-revocable, no-cost, non-exclusive rights to distribute the Work in any form LDraw.org chooses
  • The right to create derivative works of the Work


The acceptable method of including attribution information in the Work will be provided by Ldraw.org. While it is The LDraw.org's responsibility to maintain the correct attribution on all submitted works, it is the Author's responsibility to provide LDraw.org with the correct attribution information. LDraw.org will investigate and, if necessary, correct any attribution errors if notified by the Author or other persons.

Since it may become necessary for LDraw.org to contact the Author regarding the Work, it is the Author's responsibility to maintain an up to date method of contact with LDraw.org.

If it becomes necessary to change the license under which the Work is released, LDraw.org will make all reasonable efforts to contact the author regarding the change. No change to the license will be made without the author's permission; however, distribution of the Work by LDraw.org may be discontinued or the method of distribution may be altered.


To submit parts or models, you must be authorized as an author on the Parts Tracker or the LDraw Model Repository and have read and affirmed the Contributor Agreement.
To become authorized as an author you must first register with the LDraw.org Forum (it's free) and then send an email to the Parts Library Admin (Chris Dee) with your true first and last names and your LDraw.org username. You must also include the statement "I accept the LDraw.org Contributor Agreement with regards to all past and future contributions I make to LDraw.org". A list of the current authors can be found at http://www.ldraw.org/cgi-bin/tracker/ptuserlist.cgi

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LDraw is a completely unofficial, community run free CAD system which represents official parts produced by the LEGO company.