Lots of workings to search processing, UI Categories

src/NzbDrone.Core/IndexerSearch/Definitions/MusicSearchCriteria.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NzbDrone.Core.IndexerSearch.Definitions
+{
+    public class MusicSearchCriteria : SearchCriteriaBase
+    {
+        public string Album { get; set; }
+        public string Artist { get; set; }
+        public string Label { get; set; }
+    }
+}