Dependency-Track Server allows projects to be provided with tags.  This is a very useful way of slicing and dicing projects by team, customer, environment, etc. eg

/projects/?tag=java 

 It would be useful if the Jenkins Dependency-Track plugin supported the specification of tags.

The ability to add an existing tag or to create and add a new tag might be best controlled by permissions, something requested in Dependency-Track Issue #586.

For instance, I would prefer to see a build fail with a permissions issue (and a good error message) when attempting to use a tag that does not already exist in DT.

The implementation should also support lowercasing of tags (see also Dependency-Track Issue #238 so that when JAVA is specified in the plugin, what is actually used in DT is java.