diff --git a/Controllers/XFileProviderControllerBase.cs b/Controllers/XFileProviderControllerBase.cs
new file mode 100644
index 0000000..df66b35
--- /dev/null
+++ b/Controllers/XFileProviderControllerBase.cs
@@ -0,0 +1,222 @@
+using System;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore.Query;
+using Microsoft.Extensions.Logging;
+using xCommons.Configurations;
+using xCommons.Extensions;
+using xCommons.Providers;
+using xExceptions.Constants;
+using xFileService.Interfaces;
+using xFileService.Models.Dtos;
+using xFileService.Models.Entities;
+using xFileService.Providers.Dtos;
+using xIdentityService.Interfaces;
+using xTagService.Controllers;
+
+namespace xFileService.Controllers
+{
+    public abstract class XFileProviderControllerBase : XBaseProvidedHasTagControllerBase<XFile, XFileDto, Guid, XFileDtoHub>, IXFileProviderController
+    {
+        private readonly IXFileProvider provider;
+
+        protected XFileProviderControllerBase(
+            ILogger<XFileProviderControllerBase> logger,
+            XAppConfiguration appConfiguration,
+            IXIdentityProvider identityProvider,
+            XValidationProvider validationProvider,
+            IXFileProvider provider,
+            IXFileTagProvided tagProvided,
+            Func<IQueryable<XFile>, IOrderedQueryable<XFile>> defaultOrderBuilder = null,
+            Func<IQueryable<XFile>, IIncludableQueryable<XFile, object>> defaultIncludeBuilder = null
+        ) : base(
+            logger,
+            appConfiguration,
+            identityProvider,
+            validationProvider,
+            provider,
+            tagProvided,
+            defaultOrderBuilder,
+            defaultIncludeBuilder
+        )
+        {
+            this.provider = provider;
+        }
+
+        //
+        #region Reference ...
+        /// <summary>
+        /// Check an Item Has Reference to Specified ProvideFor and Specified forProvidedId ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="providedFor"></param>
+        /// <param name="forProvidedId"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        [HttpGet("{id}/Reference/IsProvidedFor")]
+        public virtual async Task<ActionResult<bool>> IsProvidedFor(
+            [FromRoute] Guid id,
+            [FromQuery] string providedFor,
+            [FromQuery] object forProvidedId,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            try
+            {
+                //
+                // Validate ...
+                if (!ModelState.IsValid)
+                {
+                    XException.InvalidArgs.Throw();
+                }
+                await ValidationProvider
+                    .GroupValidationBuilder()
+                    .AddNotNull(id)
+                    .AddNotEmpty(providedFor)
+                    .AddNotNull(forProvidedId)
+                    .ValidateGroupAsync();
+
+                //
+                var result = await provider.IsProvidedFor(
+                    id: id,
+                    providedFor: providedFor,
+                    forProvidedId: forProvidedId,
+                    cancellationToken: cancellationToken
+                );
+
+                //
+                return Ok(result);
+            }
+            catch (Exception ex)
+            {
+                //
+                var result = GetExceptionActionResult(ex);
+                return result;
+            }
+        }
+
+        /// <summary>
+        /// Add a Reference to Item for Specified ProvideFor and Specified forProvidedId ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="providedFor"></param>
+        /// <param name="forProvidedId"></param>
+        /// <param name="forIndex"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        [HttpPost("{id}/Reference")]
+        public virtual async Task<ActionResult> AddReference(
+            [FromRoute] Guid id,
+            [FromQuery] string providedFor,
+            [FromQuery] object forProvidedId,
+            [FromQuery] int forIndex = 0,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            try
+            {
+                //
+                // Validate ...
+                if (!ModelState.IsValid)
+                {
+                    XException.InvalidArgs.Throw();
+                }
+                await ValidationProvider
+                    .GroupValidationBuilder()
+                    .AddNotNull(id)
+                    .AddNotEmpty(providedFor)
+                    .AddNotNull(forProvidedId)
+                    .ValidateGroupAsync();
+
+                //
+                var userInfo = await GetUserInfo();
+                var connectionId = GetConnectionId();
+
+                //
+                await provider.AddReference(
+                    id: id,
+                    forIndex: forIndex,
+                    userInfo: userInfo,
+                    providedFor: providedFor,
+                    connectionId: connectionId,
+                    forProvidedId: forProvidedId,
+                    cancellationToken: cancellationToken
+                );
+
+                //
+                return Ok();
+            }
+            catch (Exception ex)
+            {
+                //
+                var result = GetExceptionActionResult(ex);
+                return result;
+            }
+        }
+
+        /// <summary>
+        /// Remove a Reference from Item for Specified ProvideFor and Specified forProvidedId ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="providedFor"></param>
+        /// <param name="forProvidedId"></param>
+        /// <param name="forIndex"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        [HttpDelete("{id}/Reference")]
+        public virtual async Task<ActionResult> RemoveReference(
+            [FromRoute] Guid id,
+            [FromQuery] string providedFor,
+            [FromQuery] object forProvidedId,
+            [FromQuery] int forIndex = 0,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            try
+            {
+                //
+                // Validate ...
+                if (!ModelState.IsValid)
+                {
+                    XException.InvalidArgs.Throw();
+                }
+                await ValidationProvider
+                    .GroupValidationBuilder()
+                    .AddNotNull(id)
+                    .AddNotEmpty(providedFor)
+                    .AddNotNull(forProvidedId)
+                    .ValidateGroupAsync();
+
+                //
+                var userInfo = await GetUserInfo();
+                var connectionId = GetConnectionId();
+
+                //
+                await provider.RemoveReference(
+                    id: id,
+                    forIndex: forIndex,
+                    userInfo: userInfo,
+                    providedFor: providedFor,
+                    connectionId: connectionId,
+                    forProvidedId: forProvidedId,
+                    cancellationToken: cancellationToken
+                );
+
+                //
+                return Ok();
+            }
+            catch (Exception ex)
+            {
+                //
+                var result = GetExceptionActionResult(ex);
+                return result;
+            }
+        }
+        #endregion
+    }
+}
\ No newline at end of file
diff --git a/DI/XDIHelperExtension.cs b/DI/XDIHelperExtension.cs
index 4c2d6d8..0d21dd1 100644
--- a/DI/XDIHelperExtension.cs
+++ b/DI/XDIHelperExtension.cs
@@ -15,6 +15,8 @@ using xFileService.Interfaces.Dtos;
 using xFileService.Interfaces.Entities;
 using xFileService.Providers.Dtos;
 using xFileService.Providers.Entities;
+using xFileService.Interfaces;
+using xFileService.Providers;
 
 namespace xFileService.DI
 {
@@ -213,6 +215,18 @@ namespace xFileService.DI
                 new ServiceDescriptor(typeof(IXFileRepositoryProvider), typeof(XFileRepositoryProvider), lifeTime)
             );
 
+            //
+            // Register Additional Service ...
+            services.Add(
+                new ServiceDescriptor(typeof(IXFileTagProvider), typeof(XFileTagProvider), lifeTime)
+            );
+            services.Add(
+                new ServiceDescriptor(typeof(IXFileTagProvided), typeof(XFileTagProvided), lifeTime)
+            );
+            services.Add(
+                new ServiceDescriptor(typeof(IXFileProvider), typeof(XFileProvider), lifeTime)
+            );
+
             //
             Log("Service Regitration Succeed ...");
         }
diff --git a/Interfaces/IXFileProviderController.cs b/Interfaces/IXFileProviderController.cs
index 0dd108a..32a2052 100644
--- a/Interfaces/IXFileProviderController.cs
+++ b/Interfaces/IXFileProviderController.cs
@@ -1,12 +1,12 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
+using xFileService.Models.Dtos;
+using xFileService.Models.Entities;
+using xFileService.Providers.Dtos;
+using xIdentityService.Interfaces;
+using xTagService.Interfaces;
 
 namespace xFileService.Interfaces
 {
-    public interface IXFileProviderController
-    {
-        
-    }
+    public interface IXFileProviderController : IXBaseProvidedHasTagController<XFile, XFileDto, Guid, XFileDtoHub>, IXBaseReferencedController<XFile, Guid>
+    { }
 }
\ No newline at end of file
diff --git a/Interfaces/IXFileTagProvided.cs b/Interfaces/IXFileTagProvided.cs
new file mode 100644
index 0000000..8ff8856
--- /dev/null
+++ b/Interfaces/IXFileTagProvided.cs
@@ -0,0 +1,11 @@
+using System;
+using xFileService.Models.Dtos;
+using xFileService.Models.Entities;
+using xFileService.Providers.Dtos;
+using xTagService.Interfaces;
+
+namespace xFileService.Interfaces
+{
+    public interface IXFileTagProvided : IXTagProvided<XFile, XFileDto, Guid, XFileDtoHub>
+    { }
+}
\ No newline at end of file
diff --git a/Providers/XFileTagProvided.cs b/Providers/XFileTagProvided.cs
new file mode 100644
index 0000000..d676604
--- /dev/null
+++ b/Providers/XFileTagProvided.cs
@@ -0,0 +1,56 @@
+using System;
+using xCommons.Extensions;
+using xFileService.Interfaces;
+using xFileService.Interfaces.Dtos;
+using xFileService.Models.Dtos;
+using xFileService.Models.Entities;
+using xFileService.Providers.Dtos;
+using xIdentityModels.Models;
+using xTagService.Interfaces;
+using xTagService.Providers;
+
+namespace xFileService.Providers
+{
+    public class XFileTagProvided : XBaseTagProvided<XFile, XFileDto, Guid, XFileDtoHub>, IXFileTagProvided
+    {
+        public XFileTagProvided(
+            IXFileTagProvider tagProvider,
+            IXFileServiceProvider provider
+        ) : base(
+            provider: provider,
+            tagProvider: tagProvider,
+            permittedRoles: new string[] { "admin" }
+        )
+        { }
+
+        public override bool IsOwned(
+            XFileDto item,
+            XUserClaimsInfoDto userInfo
+        )
+        {
+            //
+            var result =
+                !item.IsNullOrDefault() &&
+                !userInfo.IsNullOrDefault() &&
+                item.OwnerId == userInfo.UserId;
+
+            //
+            return result;
+        }
+
+        public override bool IsOwned(
+            XFile item,
+            XUserClaimsInfoDto userInfo
+        )
+        {
+            //
+            var result =
+                !item.IsNullOrDefault() &&
+                !userInfo.IsNullOrDefault() &&
+                item.OwnerId == userInfo.UserId;
+
+            //
+            return result;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Providers/XFileTagProvider.cs b/Providers/XFileTagProvider.cs
index 5810890..12a9a50 100644
--- a/Providers/XFileTagProvider.cs
+++ b/Providers/XFileTagProvider.cs
@@ -9,7 +9,6 @@ namespace xFileService.Providers
     public class XFileTagProvider : XBaseTagProvider<Guid>, IXFileTagProvider
     {
         public XFileTagProvider(
-            string providedFor, 
             IXTagServiceProvider tagProvider
         ) : base(
             providedFor: nameof(XFile),