I made a lot of progress today, getting used to how the Rhino engine works with the Oxygen API, and I now have two working actions with linked interface components (toolbar buttons and menu items) which allow you to add tags and also to clear tags from an entire selection. I've also added icons for these, and I've worked on the CSS for the Author view so it's easier to tell what tags in the text represent, by hovering over the curly brace representing the start tag. I think we now have a proper working environment for rapid tagging. The next stage is to have some usability testing done by HCMC folks, who in any case need to tag their texts. 360 minutes.