#  paludis --query virtual/editor
* virtual/editor
    virtuals:          1.2.5 1.3.11-r2 1.3.12-r1 (2.0.0)KA 2.0.1 2.0.2 (2.0.3)KA 4.6.1 (4.6.1-r3)KA {:0}
    installed_virtuals: 2.0.1 4.6.1* {:0}
    Virtual for:       app-misc/mc-4.6.1::installed


Key to mask reasons:

* K: keyword
* A: by association