diff --git a/src/Umbraco.Core/Constants-Examine.cs b/src/Umbraco.Core/Constants-Examine.cs
index 4ff6115749..9b1de812f7 100644
--- a/src/Umbraco.Core/Constants-Examine.cs
+++ b/src/Umbraco.Core/Constants-Examine.cs
@@ -1,15 +1,23 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace Umbraco.Core
+namespace Umbraco.Core
 {
     public static partial class Constants
     {
         public static class Examine
         {
+            /// <summary>
+            /// The alias of the internal member indexer
+            /// </summary>
+            public const string InternalMemberIndexer = "InternalMemberIndexer";
+
+            /// <summary>
+            /// The alias of the internal content indexer
+            /// </summary>
+            public const string InternalIndexer = "InternalIndexer";
+
+            /// <summary>
+            /// The alias of the external content indexer
+            /// </summary>
+            public const string ExternalIndexer = "ExternalIndexer";
             /// <summary>
             /// The alias of the internal member searcher
             /// </summary>
@@ -19,6 +27,11 @@ namespace Umbraco.Core
             /// The alias of the internal content searcher
             /// </summary>
             public const string InternalSearcher = "InternalSearcher";
+
+            /// <summary>
+            /// The alias of the external content searcher
+            /// </summary>
+            public const string ExternalSearcher = "ExternalSearcher";
         }
     }
 }
diff --git a/src/Umbraco.Web/PublishedCache/XmlPublishedCache/PublishedMediaCache.cs b/src/Umbraco.Web/PublishedCache/XmlPublishedCache/PublishedMediaCache.cs
index 47879f2c18..db2ca62794 100644
--- a/src/Umbraco.Web/PublishedCache/XmlPublishedCache/PublishedMediaCache.cs
+++ b/src/Umbraco.Web/PublishedCache/XmlPublishedCache/PublishedMediaCache.cs
@@ -130,7 +130,7 @@ namespace Umbraco.Web.PublishedCache.XmlPublishedCache
                 try
                 {
                     //by default use the InternalSearcher
-                    var indexer = eMgr.IndexProviderCollection["InternalIndexer"];
+                    var indexer = eMgr.IndexProviderCollection[Constants.Examine.InternalIndexer];
                     if (indexer.IndexerData.IncludeNodeTypes.Any() || indexer.IndexerData.ExcludeNodeTypes.Any())
                     {
                         LogHelper.Warn<PublishedMediaCache>("The InternalIndexer for examine is configured incorrectly, it should not list any include/exclude node types or field names, it should simply be configured as: " + "<IndexSet SetName=\"InternalIndexSet\" IndexPath=\"~/App_Data/TEMP/ExamineIndexes/Internal/\" />");
@@ -157,7 +157,7 @@ namespace Umbraco.Web.PublishedCache.XmlPublishedCache
 			    try
 			    {
 			        //by default use the InternalSearcher
-			        return eMgr.SearchProviderCollection["InternalSearcher"];
+			        return eMgr.SearchProviderCollection[Constants.Examine.InternalSearcher];
 			    }
 			    catch (FileNotFoundException)
 			    {
diff --git a/src/Umbraco.Web/Search/ExamineEvents.cs b/src/Umbraco.Web/Search/ExamineEvents.cs
index a56d5a14ca..20701fe330 100644
--- a/src/Umbraco.Web/Search/ExamineEvents.cs
+++ b/src/Umbraco.Web/Search/ExamineEvents.cs
@@ -53,12 +53,12 @@ namespace Umbraco.Web.Search
             CacheRefresherBase<MemberCacheRefresher>.CacheUpdated += MemberCacheRefresherCacheUpdated;
             CacheRefresherBase<ContentTypeCacheRefresher>.CacheUpdated += ContentTypeCacheRefresherCacheUpdated;
             
-			var contentIndexer = ExamineManager.Instance.IndexProviderCollection["InternalIndexer"] as UmbracoContentIndexer;
+			var contentIndexer = ExamineManager.Instance.IndexProviderCollection[Constants.Examine.InternalIndexer] as UmbracoContentIndexer;
 			if (contentIndexer != null)
 			{
 				contentIndexer.DocumentWriting += IndexerDocumentWriting;
 			}
-			var memberIndexer = ExamineManager.Instance.IndexProviderCollection["InternalMemberIndexer"] as UmbracoMemberIndexer;
+			var memberIndexer = ExamineManager.Instance.IndexProviderCollection[Constants.Examine.InternalMemberIndexer] as UmbracoMemberIndexer;
 			if (memberIndexer != null)
 			{
 				memberIndexer.DocumentWriting += IndexerDocumentWriting;
diff --git a/src/Umbraco.Web/WebServices/ExamineManagementApiController.cs b/src/Umbraco.Web/WebServices/ExamineManagementApiController.cs
index 31ef4d23f2..9c50468465 100644
--- a/src/Umbraco.Web/WebServices/ExamineManagementApiController.cs
+++ b/src/Umbraco.Web/WebServices/ExamineManagementApiController.cs
@@ -29,9 +29,9 @@ namespace Umbraco.Web.WebServices
         {
             var total = Services.MemberService.Count();
 
-            var criteria = ExamineManager.Instance.SearchProviderCollection["InternalMemberSearcher"]
+            var criteria = ExamineManager.Instance.SearchProviderCollection[Constants.Examine.InternalMemberSearcher]
                 .CreateSearchCriteria().RawQuery("__IndexType:member");
-            var totalIndexed = ExamineManager.Instance.SearchProviderCollection["InternalMemberSearcher"].Search(criteria);
+            var totalIndexed = ExamineManager.Instance.SearchProviderCollection[Constants.Examine.InternalMemberSearcher].Search(criteria);
 
             return total == totalIndexed.TotalItemCount;
         }
@@ -45,9 +45,9 @@ namespace Umbraco.Web.WebServices
         {
             var total = Services.MediaService.Count();
 
-            var criteria = ExamineManager.Instance.SearchProviderCollection["InternalSearcher"]
+            var criteria = ExamineManager.Instance.SearchProviderCollection[Constants.Examine.InternalSearcher]
                 .CreateSearchCriteria().RawQuery("__IndexType:media");
-            var totalIndexed = ExamineManager.Instance.SearchProviderCollection["InternalSearcher"].Search(criteria);
+            var totalIndexed = ExamineManager.Instance.SearchProviderCollection[Constants.Examine.InternalSearcher].Search(criteria);
 
             return total == totalIndexed.TotalItemCount;
         }
@@ -61,9 +61,9 @@ namespace Umbraco.Web.WebServices
         {
             var total = Services.ContentService.Count();
 
-            var criteria = ExamineManager.Instance.SearchProviderCollection["InternalSearcher"]
+            var criteria = ExamineManager.Instance.SearchProviderCollection[Constants.Examine.InternalSearcher]
                 .CreateSearchCriteria().RawQuery("__IndexType:content");
-            var totalIndexed = ExamineManager.Instance.SearchProviderCollection["InternalSearcher"].Search(criteria);
+            var totalIndexed = ExamineManager.Instance.SearchProviderCollection[Constants.Examine.InternalSearcher].Search(criteria);
 
             return total == totalIndexed.TotalItemCount;
         }
diff --git a/src/Umbraco.Web/umbraco.presentation/UmbracoContext.cs b/src/Umbraco.Web/umbraco.presentation/UmbracoContext.cs
index 1cf985503e..0f423f902c 100644
--- a/src/Umbraco.Web/umbraco.presentation/UmbracoContext.cs
+++ b/src/Umbraco.Web/umbraco.presentation/UmbracoContext.cs
@@ -8,6 +8,7 @@ using System.Xml;
 using umbraco.presentation.preview;
 using Examine.Providers;
 using Examine;
+using Umbraco.Core;
 
 namespace umbraco.presentation
 {
@@ -183,7 +184,7 @@ namespace umbraco.presentation
         {
             get
             {
-                return ExamineManager.Instance.SearchProviderCollection["InternalSearcher"];
+                return ExamineManager.Instance.SearchProviderCollection[Constants.Examine.InternalSearcher];
             }
         }
 
@@ -195,7 +196,7 @@ namespace umbraco.presentation
         {
             get
             {
-                return ExamineManager.Instance.SearchProviderCollection["InternalMemberSearcher"];
+                return ExamineManager.Instance.SearchProviderCollection[Constants.Examine.InternalMemberSearcher];
             }
         }
     }
diff --git a/src/umbraco.MacroEngines/RazorDynamicNode/ExamineBackedMedia.cs b/src/umbraco.MacroEngines/RazorDynamicNode/ExamineBackedMedia.cs
index f6351623ff..5ac595c652 100644
--- a/src/umbraco.MacroEngines/RazorDynamicNode/ExamineBackedMedia.cs
+++ b/src/umbraco.MacroEngines/RazorDynamicNode/ExamineBackedMedia.cs
@@ -30,11 +30,11 @@ namespace umbraco.MacroEngines
             {
                 //first check in Examine as this is WAY faster
                 var criteria = ExamineManager.Instance
-                    .SearchProviderCollection["InternalSearcher"]
+                    .SearchProviderCollection[Constants.Examine.InternalSearcher]
                     .CreateSearchCriteria("media");
                 var filter = criteria.Id(id);
                 var results = ExamineManager
-                    .Instance.SearchProviderCollection["InternalSearcher"]
+                    .Instance.SearchProviderCollection[Constants.Examine.InternalSearcher]
                     .Search(filter.Compile());
                 if (results.Any())
                 {
@@ -299,12 +299,12 @@ namespace umbraco.MacroEngines
 
         private BaseIndexProvider GetIndexer()
         {
-            return _indexer ?? ExamineManager.Instance.IndexProviderCollection["InternalIndexer"];
+            return _indexer ?? ExamineManager.Instance.IndexProviderCollection[Constants.Examine.InternalIndexer];
         }
 
         private BaseSearchProvider GetSearcher()
         {
-            return _searcher ?? ExamineManager.Instance.SearchProviderCollection["InternalSearcher"];
+            return _searcher ?? ExamineManager.Instance.SearchProviderCollection[Constants.Examine.InternalSearcher];
         }
 
         private DateTime GetvalueAsDateTime(string key)