The Trees Program for Licensed Users

Trees is a program (© Sean Crist and Anthony Kroch) that supports

1. the drawing of syntactic trees for insertion into word processing documents.
2. the creation of software exercises to help students learn the basics of syntactic structure and transformational derivations.

Trees was developed under a grant from the University of Pennsylvania School of Arts and Sciences Instructional Computing Development Fund and is used at Penn in Linguistics 250 and Linguistics 550. It is also available under license to students and faculty in more than a dozen linguistics departments in the United States and in other countries.

If you are a student affiliated the University of Pennsylvania or a licensed department, you may download the Player version of Trees 3. As exercises are assigned in your courses, the associated Trees grammars are made available by your instructors.

If you are an instructor at Penn, download the instructor's version of the program here: download

• To download the Trees 3 Player, click here.
• If you are installing the Trees Player on a Windows computer, decompress the downloaded file by double-clicking on it. Tell the program to unzip its files and let it install them in the default location. If prompted, type in the password you were sent via email or given as part of your site license. Once the program is installed, double-clicking on its icon will launch it.
   
  
• If you are installing the Player on a Macintosh computer, do not decompress the file. Instead, follow the directions below. Also, make sure that your browser doesn't automatically decompress the file as it is being downloaded.
   
  
  1. If you have never installed the X environment on your machine, install XQuartz, which is available without charge at the XQuartz site.
  2. If you are running a recent version of the MacOS X operating system, open the Security&Privacy panel in System Preferences. Choose the option to "Allow apps downloaded from Anywhere." Once you've get to the end of these instructions, you can go back to this preference and change it to a more secure setting.
  3. After downloading the Trees Player, download the Mac OSX wrapper (Wineskin) for the Trees 3 Player by clicking here.
  4. Decompress the wrapper file only and place both the downloaded still-compressed Player program and the decompressed wrapper in your Applications folder.
  5. Drag the Trees Player file icon onto the wrapper file icon. If asked whether to allow network connections, click on "Deny."
  6. Tell the program to unzip its files and let it install them in the default location. If prompted, type in the password you were sent via email or given as part of your site license.
  7. Once the program is installed in the wrapper, it will shut down. To launch it, double-click on the wrapper tree icon.
      
     
• To install the tree drawing tool for Trees 3, first download it by clicking here. Then move the downloaded tool to the Trees 3.1 folder inside the Program Files folder on your hard drive. To find this folder on a Macintosh, right-click (or hold down the control key while clicking) on the Trees Player tree icon and select "Show Package Contents" in the popup menu. Then double-click on the drive_c folder to reveal the Program Folder, into which you can drag the drawing tool file.
• To download a guide to using the Trees Player, click here.
• The most important difference between using the Trees program on a Mac and on a Windows machine is the Alt key. When grammar tools call for the use of the Alt key, the Mac version of the program uses the Mac Command Key, located to the immediate left to the space bar. Note that the keyboard may indicate that the "alt" key is associated with the "option" key, which is different from how the Trees program's key mapping works.

Instructors in licensed departments who wish to use the full version of Trees 3 should contact the faculty member in their department who holds the site license copy of that program.