update taxonomies guide (add highlighted & required

taxonomy/README.md

@@ -216,6 +216,36 @@ Tags can be used to:
 
 * Enrich IDS export with tags to fit your NIDS deployment.
 
+## More options to configure taxonomies.
+
+For MISP users and organisations, it's important to show the important contextualised information and especially the taxonomies which are important to your use-case.
+Once a taxonomy is enabled and available for use in MISP, there are two more options a admin can be set to encourage the use of particular taxonomies. Both are found in Event Actions > List Taxonomies menu.
+
+![taxonomies-list](./figures/taxonomy-list.png)
+
+### Setting a taxonomy as "Highlighted"
+
+If a taxonomy is highlighted, its namespace will appear in a visible box, even if it is not set in the event.
+
+![highlight-event](./figures/highlight-event.png)
+
+Tags are also hilighted in the event list.
+
+![highlight-list-event](./figures/highlight-list-event.png)
+
+It is also easier to add an highlighted tag to an event.
+
+![tag-box](./figures/tag-box.png)
+
+### Setting a taxonomy as "Required"
+If taxonomies are set as required, a message will be visible on the tag list of the event, enumerating the missing required taxonomies still missing.
+
+![missing-taxo](./figures/missing-taxo.png)
+
+An event will not be published if it is not tagged with at least one of tag of each required taxonomy.
+
+![publishing-without-required](./figures/publishing-without-required.png)
+
 ## Future functionalities related to MISP taxonomies
 
 - Sighting support (thanks to NCSC-NL) is integrated in MISP allowing to auto expire IOC based on user detection.