diff --git a/src/Squidex.Domain.Apps.Entities.MongoDb/Assets/MongoAssetRepository.cs b/src/Squidex.Domain.Apps.Entities.MongoDb/Assets/MongoAssetRepository.cs
index 6763827a2..8b3167968 100644
--- a/src/Squidex.Domain.Apps.Entities.MongoDb/Assets/MongoAssetRepository.cs
+++ b/src/Squidex.Domain.Apps.Entities.MongoDb/Assets/MongoAssetRepository.cs
@@ -14,6 +14,7 @@ using Squidex.Domain.Apps.Entities.Assets;
 using Squidex.Domain.Apps.Entities.Assets.Edm;
 using Squidex.Domain.Apps.Entities.Assets.Repositories;
 using Squidex.Domain.Apps.Entities.MongoDb.Assets.Visitors;
+using Squidex.Domain.Apps.Entities.Tags;
 using Squidex.Infrastructure;
 using Squidex.Infrastructure.Log;
 using Squidex.Infrastructure.MongoDb;
@@ -22,9 +23,14 @@ namespace Squidex.Domain.Apps.Entities.MongoDb.Assets
 {
     public sealed partial class MongoAssetRepository : MongoRepositoryBase<MongoAssetEntity>, IAssetRepository
     {
-        public MongoAssetRepository(IMongoDatabase database)
+        private readonly ITagService tagService;
+
+        public MongoAssetRepository(IMongoDatabase database, ITagService tagService)
             : base(database)
         {
+            Guard.NotNull(tagService, nameof(tagService));
+
+            this.tagService = tagService;
         }
 
         protected override string CollectionName()
@@ -51,7 +57,7 @@ namespace Squidex.Domain.Apps.Entities.MongoDb.Assets
                 {
                     var odataQuery = EdmAssetModel.Edm.ParseQuery(query);
 
-                    var filter = FindExtensions.BuildQuery(odataQuery, appId);
+                    var filter = FindExtensions.BuildQuery(odataQuery, appId, tagService);
 
                     var contentCount = Collection.Find(filter).CountDocumentsAsync();
                     var contentItems =
diff --git a/src/Squidex.Domain.Apps.Entities.MongoDb/Assets/Visitors/FindExtensions.cs b/src/Squidex.Domain.Apps.Entities.MongoDb/Assets/Visitors/FindExtensions.cs
index 914c1b1f2..455543d76 100644
--- a/src/Squidex.Domain.Apps.Entities.MongoDb/Assets/Visitors/FindExtensions.cs
+++ b/src/Squidex.Domain.Apps.Entities.MongoDb/Assets/Visitors/FindExtensions.cs
@@ -7,9 +7,11 @@
 
 using System;
 using System.Collections.Generic;
+using System.Threading.Tasks;
 using Microsoft.OData.UriParser;
 using MongoDB.Bson;
 using MongoDB.Driver;
+using Squidex.Domain.Apps.Entities.Tags;
 using Squidex.Infrastructure;
 using Squidex.Infrastructure.MongoDb.OData;
 
@@ -18,7 +20,7 @@ namespace Squidex.Domain.Apps.Entities.MongoDb.Assets.Visitors
     public static class FindExtensions
     {
         private static readonly FilterDefinitionBuilder<MongoAssetEntity> Filter = Builders<MongoAssetEntity>.Filter;
-        private static readonly PropertyCalculator PropertyCalculator = propertyNames =>
+        private static readonly ConvertProperty PropertyCalculator = propertyNames =>
         {
             if (propertyNames.Length > 0)
             {
@@ -47,15 +49,17 @@ namespace Squidex.Domain.Apps.Entities.MongoDb.Assets.Visitors
             return cursor.Skip(query);
         }
 
-        public static FilterDefinition<MongoAssetEntity> BuildQuery(ODataUriParser query, Guid appId)
+        public static FilterDefinition<MongoAssetEntity> BuildQuery(ODataUriParser query, Guid appId, ITagService tagService)
         {
+            var convertValue = CreateValueConverter(appId, tagService);
+
             var filters = new List<FilterDefinition<MongoAssetEntity>>
             {
                 Filter.Eq(x => x.IndexedAppId, appId),
                 Filter.Eq(x => x.IsDeleted, false)
             };
 
-            var filter = query.BuildFilter<MongoAssetEntity>(PropertyCalculator, false);
+            var filter = query.BuildFilter<MongoAssetEntity>(PropertyCalculator, convertValue, false);
 
             if (filter.Filter != null)
             {
@@ -82,5 +86,23 @@ namespace Squidex.Domain.Apps.Entities.MongoDb.Assets.Visitors
                 return new BsonDocument();
             }
         }
+
+        public static ConvertValue CreateValueConverter(Guid appId, ITagService tagService)
+        {
+            return new ConvertValue((field, value) =>
+            {
+                if (string.Equals(field, nameof(MongoAssetEntity.Tags), StringComparison.OrdinalIgnoreCase))
+                {
+                    var tags = Task.Run(() => tagService.GetTagIdsAsync(appId, TagGroups.Assets, new[] { value.ToString() })).Result;
+
+                    if (tags.Length == 1)
+                    {
+                        return tags[0] ?? value;
+                    }
+                }
+
+                return value;
+            });
+        }
     }
 }
diff --git a/src/Squidex.Domain.Apps.Entities.MongoDb/Contents/Visitors/FindExtensions.cs b/src/Squidex.Domain.Apps.Entities.MongoDb/Contents/Visitors/FindExtensions.cs
index 35f218538..de6b94581 100644
--- a/src/Squidex.Domain.Apps.Entities.MongoDb/Contents/Visitors/FindExtensions.cs
+++ b/src/Squidex.Domain.Apps.Entities.MongoDb/Contents/Visitors/FindExtensions.cs
@@ -27,7 +27,7 @@ namespace Squidex.Domain.Apps.Entities.MongoDb.Contents.Visitors
             typeof(MongoContentEntity).GetProperties()
                 .ToDictionary(x => x.Name, x => x.GetCustomAttribute<BsonElementAttribute>()?.ElementName ?? x.Name, StringComparer.OrdinalIgnoreCase);
 
-        public static PropertyCalculator CreatePropertyCalculator(Schema schema, bool useDraft)
+        public static ConvertProperty CreatePropertyCalculator(Schema schema, bool useDraft)
         {
             return propertyNames =>
             {
@@ -68,7 +68,7 @@ namespace Squidex.Domain.Apps.Entities.MongoDb.Contents.Visitors
             };
         }
 
-        public static IFindFluent<MongoContentEntity, MongoContentEntity> ContentSort(this IFindFluent<MongoContentEntity, MongoContentEntity> cursor, ODataUriParser query, PropertyCalculator propertyCalculator)
+        public static IFindFluent<MongoContentEntity, MongoContentEntity> ContentSort(this IFindFluent<MongoContentEntity, MongoContentEntity> cursor, ODataUriParser query, ConvertProperty propertyCalculator)
         {
             var sort = query.BuildSort<MongoContentEntity>(propertyCalculator);
 
@@ -85,7 +85,7 @@ namespace Squidex.Domain.Apps.Entities.MongoDb.Contents.Visitors
             return cursor.Skip(query);
         }
 
-        public static FilterDefinition<MongoContentEntity> BuildQuery(ODataUriParser query, Guid schemaId, Status[] status, PropertyCalculator propertyCalculator)
+        public static FilterDefinition<MongoContentEntity> BuildQuery(ODataUriParser query, Guid schemaId, Status[] status, ConvertProperty propertyCalculator)
         {
             var filters = new List<FilterDefinition<MongoContentEntity>>
             {
diff --git a/src/Squidex.Domain.Apps.Entities/Assets/AssetGrain.cs b/src/Squidex.Domain.Apps.Entities/Assets/AssetGrain.cs
index 53d7bdb48..687b712d0 100644
--- a/src/Squidex.Domain.Apps.Entities/Assets/AssetGrain.cs
+++ b/src/Squidex.Domain.Apps.Entities/Assets/AssetGrain.cs
@@ -78,7 +78,7 @@ namespace Squidex.Domain.Apps.Entities.Assets
                     {
                         GuardAsset.CanTag(c);
 
-                        c.Tags = await tagService.NormalizeTagsAsync(Snapshot.AppId.Id, "Assets", c.Tags, Snapshot.Tags);
+                        c.Tags = await tagService.NormalizeTagsAsync(Snapshot.AppId.Id, TagGroups.Assets, c.Tags, Snapshot.Tags);
 
                         Tag(c);
                     });
diff --git a/src/Squidex.Domain.Apps.Entities/Assets/AssetQueryService.cs b/src/Squidex.Domain.Apps.Entities/Assets/AssetQueryService.cs
index 62a33ede5..efd04181e 100644
--- a/src/Squidex.Domain.Apps.Entities/Assets/AssetQueryService.cs
+++ b/src/Squidex.Domain.Apps.Entities/Assets/AssetQueryService.cs
@@ -77,7 +77,7 @@ namespace Squidex.Domain.Apps.Entities.Assets
         {
             var tags = assets.SelectMany(x => x.Tags).Distinct().ToArray();
 
-            var tagsById = await tagService.DenormalizeTagsAsync(appId, "Assets", tags);
+            var tagsById = await tagService.DenormalizeTagsAsync(appId, TagGroups.Assets, tags);
 
             foreach (var asset in assets)
             {
diff --git a/src/Squidex.Domain.Apps.Entities/Assets/Edm/EdmAssetModel.cs b/src/Squidex.Domain.Apps.Entities/Assets/Edm/EdmAssetModel.cs
index ffb58c065..b6b77f59a 100644
--- a/src/Squidex.Domain.Apps.Entities/Assets/Edm/EdmAssetModel.cs
+++ b/src/Squidex.Domain.Apps.Entities/Assets/Edm/EdmAssetModel.cs
@@ -30,6 +30,7 @@ namespace Squidex.Domain.Apps.Entities.Assets.Edm
             entityType.AddStructuralProperty(nameof(IAssetEntity.MimeType).ToCamelCase(), EdmPrimitiveTypeKind.String);
             entityType.AddStructuralProperty(nameof(IAssetEntity.PixelHeight).ToCamelCase(), EdmPrimitiveTypeKind.Int32);
             entityType.AddStructuralProperty(nameof(IAssetEntity.PixelWidth).ToCamelCase(), EdmPrimitiveTypeKind.Int32);
+            entityType.AddStructuralProperty(nameof(IAssetEntity.Tags).ToCamelCase(), EdmPrimitiveTypeKind.String);
 
             var container = new EdmEntityContainer("Squidex", "Container");
 
diff --git a/src/Squidex.Domain.Apps.Entities/Tags/GrainTagService.cs b/src/Squidex.Domain.Apps.Entities/Tags/GrainTagService.cs
index 922a2fb68..7cfeccd85 100644
--- a/src/Squidex.Domain.Apps.Entities/Tags/GrainTagService.cs
+++ b/src/Squidex.Domain.Apps.Entities/Tags/GrainTagService.cs
@@ -29,6 +29,11 @@ namespace Squidex.Domain.Apps.Entities.Tags
             return GetGrain(appId, category).NormalizeTagsAsync(names, ids);
         }
 
+        public Task<string[]> GetTagIdsAsync(Guid appId, string category, string[] names)
+        {
+            return GetGrain(appId, category).GetTagIdsAsync(names);
+        }
+
         public Task<Dictionary<string, string>> DenormalizeTagsAsync(Guid appId, string category, string[] ids)
         {
             return GetGrain(appId, category).DenormalizeTagsAsync(ids);
diff --git a/src/Squidex.Domain.Apps.Entities/Tags/ITagGrain.cs b/src/Squidex.Domain.Apps.Entities/Tags/ITagGrain.cs
index 8dd82aa87..8639fc51b 100644
--- a/src/Squidex.Domain.Apps.Entities/Tags/ITagGrain.cs
+++ b/src/Squidex.Domain.Apps.Entities/Tags/ITagGrain.cs
@@ -15,6 +15,8 @@ namespace Squidex.Domain.Apps.Entities.Tags
     {
         Task<string[]> NormalizeTagsAsync(string[] names, string[] ids);
 
+        Task<string[]> GetTagIdsAsync(string[] names);
+
         Task<Dictionary<string, string>> DenormalizeTagsAsync(string[] ids);
 
         Task<Dictionary<string, int>> GetTagsAsync();
diff --git a/src/Squidex.Domain.Apps.Entities/Tags/ITagService.cs b/src/Squidex.Domain.Apps.Entities/Tags/ITagService.cs
index 8a48be95f..d045e1e5c 100644
--- a/src/Squidex.Domain.Apps.Entities/Tags/ITagService.cs
+++ b/src/Squidex.Domain.Apps.Entities/Tags/ITagService.cs
@@ -15,6 +15,8 @@ namespace Squidex.Domain.Apps.Entities.Tags
     {
         Task<string[]> NormalizeTagsAsync(Guid appId, string category, string[] names, string[] ids);
 
+        Task<string[]> GetTagIdsAsync(Guid appId, string category, string[] names);
+
         Task<Dictionary<string, string>> DenormalizeTagsAsync(Guid appId, string category, string[] ids);
 
         Task<Dictionary<string, int>> GetTagsAsync(Guid appId, string category);
diff --git a/src/Squidex.Domain.Apps.Entities/Tags/TagGrain.cs b/src/Squidex.Domain.Apps.Entities/Tags/TagGrain.cs
index 6fda8c6dd..0fb7c281e 100644
--- a/src/Squidex.Domain.Apps.Entities/Tags/TagGrain.cs
+++ b/src/Squidex.Domain.Apps.Entities/Tags/TagGrain.cs
@@ -106,6 +106,18 @@ namespace Squidex.Domain.Apps.Entities.Tags
             return result.ToArray();
         }
 
+        public Task<string[]> GetTagIdsAsync(string[] names)
+        {
+            var result = new List<string>();
+
+            foreach (var name in names)
+            {
+                result.Add(state.Tags.FirstOrDefault(x => x.Value.Name == name).Key);
+            }
+
+            return Task.FromResult(result.ToArray());
+        }
+
         public Task<Dictionary<string, string>> DenormalizeTagsAsync(string[] ids)
         {
             var result = new Dictionary<string, string>();
diff --git a/src/Squidex.Domain.Apps.Entities/Tags/TagGroups.cs b/src/Squidex.Domain.Apps.Entities/Tags/TagGroups.cs
new file mode 100644
index 000000000..99742c077
--- /dev/null
+++ b/src/Squidex.Domain.Apps.Entities/Tags/TagGroups.cs
@@ -0,0 +1,14 @@
+// ==========================================================================
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex UG (haftungsbeschraenkt)
+//  All rights reserved. Licensed under the MIT license.
+// ==========================================================================
+
+namespace Squidex.Domain.Apps.Entities.Tags
+{
+    public static class TagGroups
+    {
+        public const string Assets = "Assets";
+    }
+}
diff --git a/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/FilterBuilder.cs b/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/FilterBuilder.cs
index ffc82c1dc..c0562708e 100644
--- a/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/FilterBuilder.cs
+++ b/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/FilterBuilder.cs
@@ -13,7 +13,7 @@ namespace Squidex.Infrastructure.MongoDb.OData
 {
     public static class FilterBuilder
     {
-        public static (FilterDefinition<T> Filter, bool Last) BuildFilter<T>(this ODataUriParser query, PropertyCalculator propertyCalculator = null, bool supportsSearch = true)
+        public static (FilterDefinition<T> Filter, bool Last) BuildFilter<T>(this ODataUriParser query, ConvertProperty convertProperty = null, ConvertValue convertValue = null, bool supportsSearch = true)
         {
             SearchClause search;
             try
@@ -47,7 +47,7 @@ namespace Squidex.Infrastructure.MongoDb.OData
 
             if (filter != null)
             {
-                return (FilterVisitor<T>.Visit(filter.Expression, propertyCalculator), true);
+                return (FilterVisitor<T>.Visit(filter.Expression, convertProperty, convertValue), true);
             }
 
             return (null, false);
diff --git a/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/FilterVisitor.cs b/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/FilterVisitor.cs
index cfe498c4e..826068b0e 100644
--- a/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/FilterVisitor.cs
+++ b/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/FilterVisitor.cs
@@ -16,16 +16,18 @@ namespace Squidex.Infrastructure.MongoDb.OData
     public sealed class FilterVisitor<T> : QueryNodeVisitor<FilterDefinition<T>>
     {
         private static readonly FilterDefinitionBuilder<T> Filter = Builders<T>.Filter;
-        private readonly PropertyCalculator propertyCalculator;
+        private readonly ConvertProperty convertProperty;
+        private readonly ConvertValue convertValue;
 
-        private FilterVisitor(PropertyCalculator propertyCalculator)
+        private FilterVisitor(ConvertProperty convertProperty, ConvertValue convertValue)
         {
-            this.propertyCalculator = propertyCalculator;
+            this.convertProperty = convertProperty;
+            this.convertValue = convertValue;
         }
 
-        public static FilterDefinition<T> Visit(QueryNode node, PropertyCalculator propertyCalculator)
+        public static FilterDefinition<T> Visit(QueryNode node, ConvertProperty propertyCalculator, ConvertValue convertValue)
         {
-            var visitor = new FilterVisitor<T>(propertyCalculator);
+            var visitor = new FilterVisitor<T>(propertyCalculator, convertValue);
 
             return node.Accept(visitor);
         }
@@ -52,23 +54,26 @@ namespace Squidex.Infrastructure.MongoDb.OData
 
             if (string.Equals(nodeIn.Name, "endswith", StringComparison.OrdinalIgnoreCase))
             {
-                var value = BuildRegex(valueNode, v => v + "$");
+                var f = BuildFieldDefinition(fieldNode);
+                var v = BuildRegex(f, valueNode, s => s + "$");
 
-                return Filter.Regex(BuildFieldDefinition(fieldNode), value);
+                return Filter.Regex(f, v);
             }
 
             if (string.Equals(nodeIn.Name, "startswith", StringComparison.OrdinalIgnoreCase))
             {
-                var value = BuildRegex(valueNode, v => "^" + v);
+                var f = BuildFieldDefinition(fieldNode);
+                var v = BuildRegex(f, valueNode, s => "^" + s);
 
-                return Filter.Regex(BuildFieldDefinition(fieldNode), value);
+                return Filter.Regex(f, v);
             }
 
             if (string.Equals(nodeIn.Name, "contains", StringComparison.OrdinalIgnoreCase))
             {
-                var value = BuildRegex(valueNode, v => v);
+                var f = BuildFieldDefinition(fieldNode);
+                var v = BuildRegex(f, valueNode, s => s);
 
-                return Filter.Regex(BuildFieldDefinition(fieldNode), value);
+                return Filter.Regex(f, v);
             }
 
             throw new NotSupportedException();
@@ -107,53 +112,72 @@ namespace Squidex.Infrastructure.MongoDb.OData
             {
                 if (nodeIn.OperatorKind == BinaryOperatorKind.NotEqual)
                 {
-                    var field = BuildFieldDefinition(nodeIn.Left);
+                    var f = BuildFieldDefinition(nodeIn.Left);
+                    var v = BuildValue(f, nodeIn.Right);
 
-                    return Filter.Or(
-                        Filter.Not(Filter.Exists(field)),
-                        Filter.Ne(field, BuildValue(nodeIn.Right)));
+                    return Filter.Or(Filter.Not(Filter.Exists(f)), Filter.Ne(f, v));
                 }
 
                 if (nodeIn.OperatorKind == BinaryOperatorKind.Equal)
                 {
-                    return Filter.Eq(BuildFieldDefinition(nodeIn.Left), BuildValue(nodeIn.Right));
+                    var f = BuildFieldDefinition(nodeIn.Left);
+                    var v = BuildValue(f, nodeIn.Right);
+
+                    return Filter.Eq(f, v);
                 }
 
                 if (nodeIn.OperatorKind == BinaryOperatorKind.LessThan)
                 {
-                    return Filter.Lt(BuildFieldDefinition(nodeIn.Left), BuildValue(nodeIn.Right));
+                    var f = BuildFieldDefinition(nodeIn.Left);
+                    var v = BuildValue(f, nodeIn.Right);
+
+                    return Filter.Lt(f, v);
                 }
 
                 if (nodeIn.OperatorKind == BinaryOperatorKind.LessThanOrEqual)
                 {
-                    return Filter.Lte(BuildFieldDefinition(nodeIn.Left), BuildValue(nodeIn.Right));
+                    var f = BuildFieldDefinition(nodeIn.Left);
+                    var v = BuildValue(f, nodeIn.Right);
+
+                    return Filter.Lte(f, v);
                 }
 
                 if (nodeIn.OperatorKind == BinaryOperatorKind.GreaterThan)
                 {
-                    return Filter.Gt(BuildFieldDefinition(nodeIn.Left), BuildValue(nodeIn.Right));
+                    var f = BuildFieldDefinition(nodeIn.Left);
+                    var v = BuildValue(f, nodeIn.Right);
+
+                    return Filter.Gt(f, v);
                 }
 
                 if (nodeIn.OperatorKind == BinaryOperatorKind.GreaterThanOrEqual)
                 {
-                    return Filter.Gte(BuildFieldDefinition(nodeIn.Left), BuildValue(nodeIn.Right));
+                    var f = BuildFieldDefinition(nodeIn.Left);
+                    var v = BuildValue(f, nodeIn.Right);
+
+                    return Filter.Gte(f, v);
                 }
             }
 
             throw new NotSupportedException();
         }
 
-        private static BsonRegularExpression BuildRegex(QueryNode node, Func<string, string> formatter)
+        private BsonRegularExpression BuildRegex(string field, QueryNode node, Func<string, string> formatter)
+        {
+            return new BsonRegularExpression(formatter(BuildValue(field, node).ToString()), "i");
+        }
+
+        private string BuildFieldDefinition(QueryNode nodeIn)
         {
-            return new BsonRegularExpression(formatter(BuildValue(node).ToString()), "i");
+            return nodeIn.BuildFieldDefinition(convertProperty);
         }
 
-        private FieldDefinition<T, object> BuildFieldDefinition(QueryNode nodeIn)
+        private object BuildValue(string field, QueryNode nodeIn)
         {
-            return nodeIn.BuildFieldDefinition<T>(propertyCalculator);
+            return ValueConversion.Convert(field, ConstantVisitor.Visit(nodeIn), convertValue);
         }
 
-        private static object BuildValue(QueryNode nodeIn)
+        private object BuildValue(QueryNode nodeIn)
         {
             return ConstantVisitor.Visit(nodeIn);
         }
diff --git a/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/PropertyBuilder.cs b/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/PropertyBuilder.cs
index ede103c64..c1fa51466 100644
--- a/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/PropertyBuilder.cs
+++ b/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/PropertyBuilder.cs
@@ -11,23 +11,23 @@ using MongoDB.Driver;
 
 namespace Squidex.Infrastructure.MongoDb.OData
 {
-    public delegate string PropertyCalculator(string[] parts);
+    public delegate string ConvertProperty(string[] parts);
 
     public static class PropertyBuilder
     {
-        private static readonly PropertyCalculator DefaultCalculator = parts =>
+        private static readonly ConvertProperty Default = parts =>
         {
             return string.Join(".", parts).ToPascalCase();
         };
 
-        public static StringFieldDefinition<T, object> BuildFieldDefinition<T>(this QueryNode node, PropertyCalculator propertyCalculator)
+        public static string BuildFieldDefinition(this QueryNode node, ConvertProperty convertProperty)
         {
-            propertyCalculator = propertyCalculator ?? DefaultCalculator;
+            convertProperty = convertProperty ?? Default;
 
             var propertyParts = node.Accept(PropertyNameVisitor.Instance).ToArray();
-            var propertyName = propertyCalculator(propertyParts);
+            var propertyName = convertProperty(propertyParts);
 
-            return new StringFieldDefinition<T, object>(propertyName);
+            return propertyName;
         }
     }
 }
diff --git a/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/SortBuilder.cs b/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/SortBuilder.cs
index c19ca4305..9a43597e1 100644
--- a/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/SortBuilder.cs
+++ b/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/SortBuilder.cs
@@ -13,7 +13,7 @@ namespace Squidex.Infrastructure.MongoDb.OData
 {
     public static class SortBuilder
     {
-        public static SortDefinition<T> BuildSort<T>(this ODataUriParser query, PropertyCalculator propertyCalculator = null)
+        public static SortDefinition<T> BuildSort<T>(this ODataUriParser query, ConvertProperty propertyCalculator = null)
         {
             var orderBy = query.ParseOrderBy();
 
@@ -41,9 +41,9 @@ namespace Squidex.Infrastructure.MongoDb.OData
             return null;
         }
 
-        public static SortDefinition<T> OrderBy<T>(OrderByClause clause, PropertyCalculator propertyCalculator = null)
+        public static SortDefinition<T> OrderBy<T>(OrderByClause clause, ConvertProperty propertyCalculator = null)
         {
-            var propertyName = clause.Expression.BuildFieldDefinition<T>(propertyCalculator);
+            var propertyName = clause.Expression.BuildFieldDefinition(propertyCalculator);
 
             if (clause.Direction == OrderByDirection.Ascending)
             {
diff --git a/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/ValueConversion.cs b/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/ValueConversion.cs
new file mode 100644
index 000000000..8492c7098
--- /dev/null
+++ b/src/Squidex.Infrastructure.MongoDb/MongoDb/OData/ValueConversion.cs
@@ -0,0 +1,24 @@
+// ==========================================================================
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex UG (haftungsbeschraenkt)
+//  All rights reserved. Licensed under the MIT license.
+// ==========================================================================
+
+namespace Squidex.Infrastructure.MongoDb.OData
+{
+    public delegate object ConvertValue(string field, object value);
+
+    public static class ValueConversion
+    {
+        public static object Convert(string field, object value, ConvertValue converter = null)
+        {
+            if (converter == null)
+            {
+                return value;
+            }
+
+            return converter(field, value);
+        }
+    }
+}
diff --git a/tests/Squidex.Domain.Apps.Entities.Tests/Assets/OData/ODataQueryTests.cs b/tests/Squidex.Domain.Apps.Entities.Tests/Assets/OData/ODataQueryTests.cs
index 6a0a6be00..cfe1a5b51 100644
--- a/tests/Squidex.Domain.Apps.Entities.Tests/Assets/OData/ODataQueryTests.cs
+++ b/tests/Squidex.Domain.Apps.Entities.Tests/Assets/OData/ODataQueryTests.cs
@@ -5,6 +5,7 @@
 //  All rights reserved. Licensed under the MIT license.
 // ==========================================================================
 
+using System;
 using FakeItEasy;
 using Microsoft.OData.Edm;
 using MongoDB.Bson.Serialization;
@@ -12,6 +13,7 @@ using MongoDB.Driver;
 using Squidex.Domain.Apps.Entities.Assets.Edm;
 using Squidex.Domain.Apps.Entities.MongoDb.Assets;
 using Squidex.Domain.Apps.Entities.MongoDb.Assets.Visitors;
+using Squidex.Domain.Apps.Entities.Tags;
 using Squidex.Infrastructure.MongoDb;
 using Squidex.Infrastructure.MongoDb.OData;
 using Xunit;
@@ -20,15 +22,26 @@ namespace Squidex.Domain.Apps.Entities.Assets.OData
 {
     public class ODataQueryTests
     {
+        private readonly ITagService tagService = A.Fake<ITagService>();
         private readonly IBsonSerializerRegistry registry = BsonSerializer.SerializerRegistry;
         private readonly IBsonSerializer<MongoAssetEntity> serializer = BsonSerializer.SerializerRegistry.GetSerializer<MongoAssetEntity>();
         private readonly IEdmModel edmModel = EdmAssetModel.Edm;
+        private readonly Guid appId = Guid.NewGuid();
+        private readonly ConvertValue valueConverter;
 
         static ODataQueryTests()
         {
             InstantSerializer.Register();
         }
 
+        public ODataQueryTests()
+        {
+            A.CallTo(() => tagService.GetTagIdsAsync(appId, TagGroups.Assets, A<string[]>.That.Contains("tag1")))
+                .Returns(new[] { "normalized1" });
+
+            valueConverter = FindExtensions.CreateValueConverter(appId, tagService);
+        }
+
         [Fact]
         public void Should_parse_query()
         {
@@ -82,6 +95,24 @@ namespace Squidex.Domain.Apps.Entities.Assets.OData
             Assert.Equal(o, i);
         }
 
+        [Fact]
+        public void Should_make_query_with_normalized_tags()
+        {
+            var i = F("$filter=tags eq 'tag1'");
+            var o = C("{ 'Tags' : 'normalized1' }");
+
+            Assert.Equal(o, i);
+        }
+
+        [Fact]
+        public void Should_make_query_with_tags()
+        {
+            var i = F("$filter=tags eq 'tag2'");
+            var o = C("{ 'Tags' : 'tag2' }");
+
+            Assert.Equal(o, i);
+        }
+
         [Fact]
         public void Should_make_query_with_fileName()
         {
@@ -246,7 +277,7 @@ namespace Squidex.Domain.Apps.Entities.Assets.OData
             var parser = edmModel.ParseQuery(value);
 
             var query =
-                parser.BuildFilter<MongoAssetEntity>()
+                parser.BuildFilter<MongoAssetEntity>(convertValue: valueConverter)
                     .Filter.Render(serializer, registry).ToString();
 
             return query;
diff --git a/tests/Squidex.Domain.Apps.Entities.Tests/Contents/ContentQueryServiceTests.cs b/tests/Squidex.Domain.Apps.Entities.Tests/Contents/ContentQueryServiceTests.cs
index 8911861be..02d6b9b6d 100644
--- a/tests/Squidex.Domain.Apps.Entities.Tests/Contents/ContentQueryServiceTests.cs
+++ b/tests/Squidex.Domain.Apps.Entities.Tests/Contents/ContentQueryServiceTests.cs
@@ -187,7 +187,7 @@ namespace Squidex.Domain.Apps.Entities.Contents
             A.CallTo(() => contentRepository.QueryAsync(app, schema, A<Status[]>.That.IsSameSequenceAs(status), A<ODataUriParser>.Ignored))
                 .Returns(ResultList.Create(Enumerable.Repeat(content, count), total));
 
-            var result = await sut.QueryAsync(context.WithSchemaId(schemaId).WithArchived(archive), A<Query>.That.Matches(x => x.ODataQuery == string.Empty));
+            var result = await sut.QueryAsync(context.WithSchemaId(schemaId).WithArchived(archive), Query.Empty);
 
             Assert.Equal(contentData, result[0].Data);
             Assert.Equal(content.Id, result[0].Id);
@@ -215,7 +215,7 @@ namespace Squidex.Domain.Apps.Entities.Contents
             A.CallTo(() => modelBuilder.BuildEdmModel(schema, app))
                 .Throws(new ODataException());
 
-            return Assert.ThrowsAsync<ValidationException>(() => sut.QueryAsync(context.WithSchemaId(schemaId), A<Query>.That.Matches(x => x.ODataQuery == "query")));
+            return Assert.ThrowsAsync<ValidationException>(() => sut.QueryAsync(context.WithSchemaId(schemaId), Query.Empty.WithODataQuery("query")));
         }
 
         public static IEnumerable<object[]> ManyIdRequestData = new[]
@@ -241,7 +241,7 @@ namespace Squidex.Domain.Apps.Entities.Contents
             A.CallTo(() => contentRepository.QueryAsync(app, schema, A<Status[]>.That.IsSameSequenceAs(status), A<HashSet<Guid>>.Ignored))
                 .Returns(ResultList.Create(ids.Select(x => CreateContent(x)).Shuffle(), total));
 
-            var result = await sut.QueryAsync(context.WithSchemaId(schemaId).WithArchived(archive), A<Query>.Ignored);
+            var result = await sut.QueryAsync(context.WithSchemaId(schemaId).WithArchived(archive), Query.Empty.WithIds(ids));
 
             Assert.Equal(ids, result.Select(x => x.Id).ToList());
             Assert.Equal(total, result.Total);