DES is a web-based collaborative system to transcribe serial historic sources to structured data. The web-based system runs completely in the web browser without additional plug-ins. Its key feature is the fact that data entry is performed directly on scanned images: The scan is used as background image of the browser window; it is overlaid by the entry mask as well as text boxes with already transcribed data. The system has been successfully used to transcribe more than 31,000 pages from the German WW1 casualty lists to structured data resulting in more than 8.5 million entries.
You can access CompGen's productive installation at http://des.genealogy.net
## Testing
We are using [BrowserStack](https://www.browserstack.com) for end-to-end tests. Here is the result of the last test: [](https://www.browserstack.com/automate/public-build/VUVzY2M2NzZjMlBUV3RZOC9MN2tXUFNDZkV1eWJRQUt6K2tYbTE3ajMwYz0tLTZjZ1JZUFZmTmRNNmhuZ0wrcWxUQlE9PQ==--5ea8e3624c3a45a135fccf0d527207cec69018e1)
listInstance.errors.rejectValue("version","default.optimistic.locking.failure",[message(code:'list.label',default:'List')]asObject[],"Another user has updated this List while you were editing")