PLEASE READ CAREFULLY:
AUTODESK, INC. ("AUTODESK") LICENSES THIS SOFTWARE TO YOU ONLY UPON THE CONDITION THAT YOU ACCEPT ALL OF THE TERMS CONTAINED IN THIS SOFTWARE LICENSE AGREEMENT ("AGREEMENT").
BY SELECTING THE "I ACCEPT" BUTTON BELOW THIS AGREEMENT OR BY COPYING, INSTALLING, UPLOADING, ACCESSING, OR USING ALL OR ANY PORTION OF THE SOFTWARE YOU AGREE TO BE LEGALLY BOUND BY THIS AGREEMENT.  A CONTRACT IS THEN FORMED BETWEEN AUTODESK AND EITHER YOU PERSONALLY, IF YOU ACQUIRE THE SOFTWARE FOR YOURSELF, OR THE COMPANY OR OTHER LEGAL ENTITY FOR WHICH YOU ARE ACQUIRING THE SOFTWARE.
IF YOU DO NOT AGREE OR DO NOT WISH TO BIND YOURSELF OR THE ENTITY YOU REPRESENT: (A) DO NOT COPY, INSTALL, UPLOAD, ACCESS, OR USE THE SOFTWARE; (B) SELECT THE "I REJECT" BUTTON BELOW THIS AGREEMENT (WHICH WILL CANCEL THE LOADING OF THE SOFTWARE); AND (C) WITHIN THIRTY (30) DAYS FROM THE DATE OF ACQUISITION, RETURN THE SOFTWARE TO THE LOCATION WHERE YOU ACQUIRED IT FOR A REFUND, IF APPLICABLE.
COPYING, INSTALLATION, UPLOADING, ACCESS, OR USE OF THIS SOFTWARE OR ANY ACCOMPANYING DOCUMENTATION OR MATERIALS EXCEPT AS PERMITTED BY THIS AGREEMENT IS UNAUTHORIZED AND CONSTITUTES A MATERIAL BREACH OF THIS AGREEMENT AND AN INFRINGEMENT OF THE COPYRIGHT AND OTHER INTELLECTUAL PROPERTY RIGHTS IN SUCH SOFTWARE AND DOCUMENTATION. IF YOU COPY, INSTALL, UPLOAD, ACCESS, OR USE ALL OR ANY PORTION OF THIS SOFTWARE OR ITS USER DOCUMENTATION WITHOUT ENTERING INTO THIS AGREEMENT OR OTHERWISE OBTAINING WRITTEN PERMISSION OF AUTODESK, YOU ARE VIOLATING COPYRIGHT AND OTHER INTELLECTUAL PROPERTY LAW.  YOU MAY BE LIABLE TO AUTODESK AND ITS LICENSORS FOR DAMAGES, AND YOU MAY BE SUBJECT TO CRIMINAL PENALTIES.
This Agreement accompanies the Autodesk® Revit API product and related explanatory materials ("Software"). The term "Software" shall also include any upgrades, modified versions, or updates of the Software licensed to you by Autodesk. 
1. Use of the Software
You may install the Software in a single location on a single hard disk or other storage device; install and use the Software on a file server for use on a network for the purpose of installation onto hard disks or other storage devices or use the Software over such network; and make backup copies of the Software. You may not use the Software for competitive analysis purposes. You may make unlimited copies of the Software and give copies to other persons or entities so long as (i) all such copies are used to develop applications for Autodesk products based on the Revit platform and (ii) all such copies contain this Agreement and the same copyright and other proprietary notices that appear on or in the Software. 

You may also (a) modify and make unlimited copies of the source code examples contained in the Software ("Source Examples") and any resulting binary files for the exclusive purpose of incorporation into Your own works (the "User Works"); and You may also (b) use the User Works subject to the following restrictions:  (1) You must clearly identify any modified Source Examples and any resulting binary files as User Works developed by You, and not by Autodesk, and You must use class identifications for any classes of objects You create that are different and clearly distinguishable from the class identifications used by Autodesk;  (2) You may distribute the resulting binary files of the Source Examples in User Works that are commercially distributed software applications only if: (i) such applications require a Revit platform product to operate; and (ii) such applications contain, subject to Autodesk's sole discretion, significant features and functionality in addition to the Source Examples so that the Source Examples are not the primary source of value.  In any copy of the Source Examples, derivative works, and resulting binary files, You must include the copyright notices of Autodesk, Inc. as well as the following statement: "This software contains copyrighted code owned by Autodesk but has been modified and is not endorsed by Autodesk in its modified form".
2. Copyright
The Software is owned by Autodesk and its suppliers, and its structure, organization and code are the valuable trade secrets of Autodesk and its suppliers. The Software is also protected by copyright law and international treaty provisions. You agree not to modify, adapt, translate, reverse engineer, decompile, disassemble, or otherwise attempt to discover the source code of the Software except as expressly provided for in this Agreement. You may use trademarks only to identify printed output produced by the Software, in accordance with accepted trademark practice, including identification of trademark owner's name. Such use of any trademark does not give you any rights of ownership in that trademark. Except as stated above, this Agreement does not grant you any intellectual property rights in the Software. 
3. NO WARRANTY AND LIMITATION OF LIABILITY
The Software is provided to you "AS IS," and you acknowledge that it may contain errors. Autodesk disclaims any warranty or liability obligations to you of any kind. 
AUTODESK AND ITS SUPPLIERS DO NOT AND CANNOT WARRANT THE PERFORMANCE OR RESULTS YOU MAY OBTAIN BY USING THE SOFTWARE. AUTODESK AND ITS SUPPLIERS MAKE NO WARRANTIES, EXPRESS OR IMPLIED, AS TO NONINFRINGEMENT OF THIRD PARTY RIGHTS, MERCHANTABILITY, OR FITNESS FOR ANY PARTICULAR PURPOSE. IN NO EVENT WILL AUTODESK OR ITS SUPPLIERS BE LIABLE TO YOU FOR ANY CONSEQUENTIAL, INCIDENTAL OR SPECIAL DAMAGES, INCLUDING ANY LOST PROFITS OR LOST SAVINGS, EVEN IF AN AUTODESK REPRESENTATIVE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM BY ANY THIRD PARTY. 
Some states or jurisdictions do not allow the exclusion or limitation of incidental, consequential, or special damages, or the exclusion of implied warranties or limitations on how long an implied warranty may last, so the above limitations may not apply to you.
4. Governing Law and General Provisions
This Agreement will be governed by the laws of the State of California, U.S.A., excluding the application of its conflicts of law rules. This Agreement will not be governed by the United Nations Convention on Contracts for the International Sale of Goods, the application of which is expressly excluded. If any part of this Agreement is found void and unenforceable, it will not affect the validity of the balance of the Agreement, which shall remain valid and enforceable according to its terms. You agree that the Software will not be shipped, transferred or exported into any country or used in any manner prohibited by the United States Export Administration Act or any other export laws, restrictions or regulations. This Agreement shall automatically terminate upon failure by you to comply with its terms.
5. Notice to Government End Users
All Autodesk Software provided to the U.S. Government are provided with the same commercial license rights and restrictions described elsewhere herein.