OMTo accepts collaborative material under the following conditions:

1. all material must be original: that includes text, drawings, computer programs, etc. OMTo does not wish to violate any copyright laws and any material which so violate will be duly removed.
2. OMTo is a non-profit organisation and as such, any contributed material is so given as to refrain from profit.
3. all contributed material must contain a notice indicating whether it has been previously published (in a magazine, as lecture notes, etc.)
4. material which can be considered advertisements will not be accepted.
5. material donated must refrain from ad hominen attacks or from attacks at institutions. OMTo believes textbooks are not the appropriate forum to express particular opinions about persons or institutions.
6. All work must contain a note like the one on this item, or the one on the next item:

   This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, version 1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/ .

   THIS WORK IS LICENSED AND PROVIDED ``AS IS'' WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE OR A WARRANTY OF NON-INFRINGEMENT.

   THIS DOCUMENT MAY NOT BE SOLD FOR PROFIT OR INCORPORATED INTO COMMERCIAL DOCUMENTS WITHOUT EXPRESS PERMISSION FROM THE AUTHOR(S). THIS DOCUMENT MAY BE FREELY DISTRIBUTED PROVIDED THE NAME OF THE ORIGINAL AUTHOR(S) IS(ARE) KEPT AND ANY CHANGES TO IT NOTED.

7. Some collaborators might prefer the copyleft notice available here: GNU Free Documentation License.