# Document license All right reserved. Rights given by the copyleft licenses are indicated below. Copyright (c) 2007 2i2L Sarl. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation ; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License". The contents of this tutorial are available under a double **copyleft** license: [GNU FDL](http://www.gnu.org/licenses/fdl.txt) : and [CC-BY-SA](http://creativecommons.org/licenses/by-sa/2.0/fr/) : A small amount of illustrations have been borrowed from the OpenClipart library. In the true spirit of software freedom, all fixes and updates to this tutorial are welcome at this e-mail address: --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.chamilo.org/1.11.x/teacher-guide/appendix/document_license.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.