Chemotion URI schema is meant to bridge the gap between browser and desktop applications. A common use case would be accessing and editing files stored in the ELN with desktop-installed applications. While one could simply download the files from the ELN and then open the file with a specific application the goal is to simplify the process to only require a single click.
The idea would be to install a URI schema handler on the client system and generating clickable links in the lab journal. The handler can then, for example, download data, launch the desired application, wait for changes and reupload the data afterwards. A simplified example can be seen here: {%youtube da_2mAzXj_Y %}