diff --git a/models/tag.go b/models/tag.go
index 8560cb8..a9f37c3 100644
--- a/models/tag.go
+++ b/models/tag.go
@@ -5,3 +5,8 @@ type Tag struct {
 	Kind TagKind `bson:"kind"`
 	Name string  `bson:"name"`
 }
+
+// Equal returns true if the tags match one another.
+func (tag *Tag) Equal(other Tag) bool {
+	return tag.Kind == other.Kind && tag.Name == other.Name
+}