EspressoDev Plug-in
The EspressoDev plug-in adds common plug-in XML elements to CodeSense, making it easier to author Espresso plug-ins.
Download the EspressoDev plug-in
Unzip the plug-in and double click it to install (as with any other plug-in). The next time you relaunch Espresso you will have access to plug-in-related CodeSense in your XML files.