Just under the main banner for this site you'll see a main header in orange called 'Labels'. Here a string of key words or Labels appears.
These labels function as tags to the material entered into the site. When a user makes an entry, it's possible to also choose how to label it. This means adding a new label or selecting one/s from the list that appears automatically. These choices appear at the bottom of the screen when you are in edit mode.
Labels from across the site are then gathered and the string of labels above is shown. Clicking on one of labels in the string leads you to all those entries in the site that is tagged with the label.
This help us build semantic links across transactions. Building such links is part of the 'transactional research rhetoric' InterMedia (a partner in the group) has designed and built for the site as well as being one of their research objects under Transactions.
For us this shows how a research group with related but varying interest can build a set of core, shared concepts over time, across projects and via situated use of this wiki based site.