diff --git a/src/Microsoft.OpenApi.OData.Reader/Edm/EdmAnnotationExtensions.cs b/src/Microsoft.OpenApi.OData.Reader/Edm/EdmAnnotationExtensions.cs
index b5eb1e32..9b9658f9 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Edm/EdmAnnotationExtensions.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/Edm/EdmAnnotationExtensions.cs
@@ -9,9 +9,11 @@
 using System.Linq;
 using Microsoft.OData.Edm;
 using Microsoft.OData.Edm.Vocabularies;
+using Microsoft.OpenApi.Models;
 using Microsoft.OpenApi.OData.Common;
 using Microsoft.OpenApi.OData.Vocabulary;
 using Microsoft.OpenApi.OData.Vocabulary.Authorization;
+using Microsoft.OpenApi.OData.Vocabulary.Core;
 
 namespace Microsoft.OpenApi.OData.Edm
 {
@@ -256,6 +258,21 @@ public static IEnumerable<T> GetCollection<T>(this IEdmModel model, IEdmVocabula
             });
         }
 
+        /// <summary>
+        /// Gets the links record value (a complex type) for the given <see cref="IEdmVocabularyAnnotatable"/>.
+        /// </summary>
+        /// <param name="model">The Edm model.</param>
+        /// <param name="target">The Edm target.</param>
+        /// <param name="linkRel">The link relation type for path operation.</param>
+        /// <returns>Null or the links record value (a complex type) for this annotation.</returns>
+        public static Link GetLinkRecord(this IEdmModel model, IEdmVocabularyAnnotatable target, string linkRel)
+        {
+            Utils.CheckArgumentNull(model, nameof(model));
+            Utils.CheckArgumentNull(target, nameof(target));
+
+            return model.GetCollection<Link>(target, CoreConstants.Links)?.FirstOrDefault(x => x.Rel == linkRel);
+        }
+
         /// <summary>
         /// Create the corresponding Authorization object.
         /// </summary>
diff --git a/src/Microsoft.OpenApi.OData.Reader/Edm/ODataContext.cs b/src/Microsoft.OpenApi.OData.Reader/Edm/ODataContext.cs
index edf433ce..63841a68 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Edm/ODataContext.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/Edm/ODataContext.cs
@@ -177,7 +177,7 @@ internal IEnumerable<DeprecatedRevisionsType> GetDeprecationInformations(IEdmVoc
         {
             return annotable == null ?
                 Enumerable.Empty<DeprecatedRevisionsType>() :
-                    (Model?.GetCollection<DeprecatedRevisionsType>(annotable, "Org.OData.Core.V1.Revisions") ?? 
+                    (Model?.GetCollection<DeprecatedRevisionsType>(annotable, CoreConstants.Revisions) ?? 
                     Enumerable.Empty<DeprecatedRevisionsType>());
         }
     }
diff --git a/src/Microsoft.OpenApi.OData.Reader/OpenApiConvertSettings.cs b/src/Microsoft.OpenApi.OData.Reader/OpenApiConvertSettings.cs
index 5b7ed51e..00ea04b2 100644
--- a/src/Microsoft.OpenApi.OData.Reader/OpenApiConvertSettings.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/OpenApiConvertSettings.cs
@@ -8,6 +8,7 @@
 using Microsoft.OpenApi.OData.Common;
 using Microsoft.OpenApi.OData.Edm;
 using Microsoft.OpenApi.OData.Extensions;
+using Microsoft.OpenApi.OData.Vocabulary.Core;
 
 namespace Microsoft.OpenApi.OData
 {
@@ -179,6 +180,11 @@ public string PathPrefix
         /// </summary>
         public bool ShowMsDosGroupPath { get; set; } = true;
 
+        /// <summary>
+        /// Gets/sets links to external documentation for operations
+        /// </summary>
+        public bool ShowExternalDocs { get; set; } = true;
+
         /// <summary>
         /// Gets/sets a the path provider.
         /// </summary>
@@ -259,6 +265,20 @@ public string PathPrefix
         /// </summary>
         public bool UseSuccessStatusCodeRange { get; set; } = false;
 
+        /// <summary>
+        /// Get/Sets a dictionary containing a mapping of HTTP methods to custom link relation types 
+        /// </summary>
+        public Dictionary<LinkRelKey, string> CustomHttpMethodLinkRelMapping { get; set; } = new()
+        {
+            { LinkRelKey.List, "https://graph.microsoft.com/rels/docs/list" },
+            { LinkRelKey.ReadByKey, "https://graph.microsoft.com/rels/docs/get" },
+            { LinkRelKey.Create, "https://graph.microsoft.com/rels/docs/create" },
+            { LinkRelKey.Update, "https://graph.microsoft.com/rels/docs/update" },
+            { LinkRelKey.Delete, "https://graph.microsoft.com/rels/docs/delete" },
+            { LinkRelKey.Action, "https://graph.microsoft.com/rels/docs/action" },
+            { LinkRelKey.Function, "https://graph.microsoft.com/rels/docs/function" }
+        };
+
         internal OpenApiConvertSettings Clone()
         {
             var newSettings = new OpenApiConvertSettings
@@ -288,6 +308,7 @@ internal OpenApiConvertSettings Clone()
                 RequireDerivedTypesConstraintForBoundOperations = this.RequireDerivedTypesConstraintForBoundOperations,
                 ShowSchemaExamples = this.ShowSchemaExamples,
                 ShowRootPath = this.ShowRootPath,
+                ShowExternalDocs = this.ShowExternalDocs,
                 PathProvider = this.PathProvider,
                 EnableDollarCountPath = this.EnableDollarCountPath,
                 AddSingleQuotesForStringParameters = this.AddSingleQuotesForStringParameters,
@@ -300,6 +321,7 @@ internal OpenApiConvertSettings Clone()
                 RequireRestrictionAnnotationsToGenerateComplexPropertyPaths = this.RequireRestrictionAnnotationsToGenerateComplexPropertyPaths,
                 ExpandDerivedTypesNavigationProperties = this.ExpandDerivedTypesNavigationProperties,
                 CustomXMLAttributesMapping = this.CustomXMLAttributesMapping,
+                CustomHttpMethodLinkRelMapping = this.CustomHttpMethodLinkRelMapping,
                 AppendBoundOperationsOnDerivedTypeCastSegments = this.AppendBoundOperationsOnDerivedTypeCastSegments,
                 UseSuccessStatusCodeRange = this.UseSuccessStatusCodeRange
             };
diff --git a/src/Microsoft.OpenApi.OData.Reader/Operation/EdmActionOperationHandler.cs b/src/Microsoft.OpenApi.OData.Reader/Operation/EdmActionOperationHandler.cs
index 77cd097a..1844181b 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Operation/EdmActionOperationHandler.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/Operation/EdmActionOperationHandler.cs
@@ -7,7 +7,9 @@
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Models;
 using Microsoft.OpenApi.OData.Common;
+using Microsoft.OpenApi.OData.Edm;
 using Microsoft.OpenApi.OData.Generator;
+using Microsoft.OpenApi.OData.Vocabulary.Capabilities;
 
 namespace Microsoft.OpenApi.OData.Operation
 {
@@ -19,6 +21,19 @@ internal class EdmActionOperationHandler : EdmOperationOperationHandler
         /// <inheritdoc/>
         public override OperationType OperationType => OperationType.Post;
 
+        /// <inheritdoc/>
+        protected override void SetBasicInfo(OpenApiOperation operation)
+        {
+            base.SetBasicInfo(operation);
+
+            // Description
+            var insertRestrictions = Context.Model.GetRecord<InsertRestrictionsType>(EdmOperation, CapabilitiesConstants.InsertRestrictions);
+            if (!string.IsNullOrWhiteSpace(insertRestrictions?.LongDescription))
+            {
+                operation.Description = insertRestrictions.LongDescription;
+            }
+        }
+
         /// <inheritdoc/>
         protected override void SetRequestBody(OpenApiOperation operation)
         {
diff --git a/src/Microsoft.OpenApi.OData.Reader/Operation/EdmFunctionOperationHandler.cs b/src/Microsoft.OpenApi.OData.Reader/Operation/EdmFunctionOperationHandler.cs
index c1134f8d..192a2976 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Operation/EdmFunctionOperationHandler.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/Operation/EdmFunctionOperationHandler.cs
@@ -7,6 +7,8 @@
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Models;
 using Microsoft.OpenApi.OData.Common;
+using Microsoft.OpenApi.OData.Edm;
+using Microsoft.OpenApi.OData.Vocabulary.Capabilities;
 
 namespace Microsoft.OpenApi.OData.Operation
 {
@@ -23,6 +25,19 @@ internal class EdmFunctionOperationHandler : EdmOperationOperationHandler
         /// </summary>
         public IEdmFunction Function => EdmOperation as IEdmFunction;
 
+        /// <inheritdoc/>
+        protected override void SetBasicInfo(OpenApiOperation operation)
+        {
+            base.SetBasicInfo(operation);
+
+            // Description
+            var readRestrictions = Context.Model.GetRecord<ReadRestrictionsType>(EdmOperation, CapabilitiesConstants.ReadRestrictions);
+            if (!string.IsNullOrWhiteSpace(readRestrictions?.LongDescription))
+            {
+                operation.Description = readRestrictions.LongDescription;
+            }
+        }
+
         /// <inheritdoc/>
         protected override void SetExtensions(OpenApiOperation operation)
         {
diff --git a/src/Microsoft.OpenApi.OData.Reader/Operation/EdmOperationImportOperationHandler.cs b/src/Microsoft.OpenApi.OData.Reader/Operation/EdmOperationImportOperationHandler.cs
index 36c3b141..13ee7af7 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Operation/EdmOperationImportOperationHandler.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/Operation/EdmOperationImportOperationHandler.cs
@@ -13,6 +13,7 @@
 using Microsoft.OpenApi.OData.Edm;
 using Microsoft.OpenApi.OData.Generator;
 using Microsoft.OpenApi.OData.Vocabulary.Capabilities;
+using Microsoft.OpenApi.OData.Vocabulary.Core;
 
 namespace Microsoft.OpenApi.OData.Operation
 {
@@ -152,5 +153,18 @@ internal static string PathAsString(IEnumerable<string> path)
         {
             return String.Join("/", path);
         }
+
+        /// <inheritdoc/>
+        protected override void SetExternalDocs(OpenApiOperation operation)
+        {
+            if (Context.Settings.ShowExternalDocs && Context.Model.GetLinkRecord(EdmOperationImport, CustomLinkRel) is Link externalDocs)
+            {
+                operation.ExternalDocs = new OpenApiExternalDocs()
+                {
+                    Description = CoreConstants.ExternalDocsDescription,
+                    Url = externalDocs.Href
+                };
+            }
+        }
     }
 }
diff --git a/src/Microsoft.OpenApi.OData.Reader/Operation/EdmOperationOperationHandler.cs b/src/Microsoft.OpenApi.OData.Reader/Operation/EdmOperationOperationHandler.cs
index b8bded2f..cb50b01c 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Operation/EdmOperationOperationHandler.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/Operation/EdmOperationOperationHandler.cs
@@ -12,6 +12,7 @@
 using Microsoft.OpenApi.OData.Edm;
 using Microsoft.OpenApi.OData.Generator;
 using Microsoft.OpenApi.OData.Vocabulary.Capabilities;
+using Microsoft.OpenApi.OData.Vocabulary.Core;
 
 namespace Microsoft.OpenApi.OData.Operation
 {
@@ -42,9 +43,7 @@ internal abstract class EdmOperationOperationHandler : OperationHandler
 
         /// <inheritdoc/>
         protected override void Initialize(ODataContext context, ODataPath path)
-        {
-            base.Initialize(context, path);
-
+        { 
             // It's bound operation, the first segment must be the navigaiton source.
             ODataNavigationSourceSegment navigationSourceSegment = path.FirstSegment as ODataNavigationSourceSegment;
             NavigationSource = navigationSourceSegment.NavigationSource;
@@ -53,6 +52,8 @@ protected override void Initialize(ODataContext context, ODataPath path)
             EdmOperation = OperationSegment.Operation;
 
             HasTypeCast = path.Segments.Any(s => s is ODataTypeCastSegment);
+
+            base.Initialize(context, path);
         }
 
         /// <inheritdoc/>
@@ -198,5 +199,30 @@ protected override void AppendCustomParameters(OpenApiOperation operation)
                 AppendCustomParameters(operation, restriction.CustomQueryOptions, ParameterLocation.Query);
             }
         }
+
+        /// <inheritdoc/>
+        protected override void SetCustomLinkRelType()
+        {
+            if (Context.Settings.CustomHttpMethodLinkRelMapping != null && EdmOperation != null)
+            {
+                LinkRelKey key = EdmOperation.IsAction() ? LinkRelKey.Action : LinkRelKey.Function;
+                Context.Settings.CustomHttpMethodLinkRelMapping.TryGetValue(key, out string linkRelValue);
+                CustomLinkRel =  linkRelValue;
+            }
+        }
+    
+
+    /// <inheritdoc/>
+    protected override void SetExternalDocs(OpenApiOperation operation)
+        {
+            if (Context.Settings.ShowExternalDocs && Context.Model.GetLinkRecord(EdmOperation, CustomLinkRel) is Link externalDocs)
+            {
+                operation.ExternalDocs = new OpenApiExternalDocs()
+                {
+                    Description = CoreConstants.ExternalDocsDescription,
+                    Url = externalDocs.Href
+                };
+            }
+        }
     }
 }
diff --git a/src/Microsoft.OpenApi.OData.Reader/Operation/EntitySetOperationHandler.cs b/src/Microsoft.OpenApi.OData.Reader/Operation/EntitySetOperationHandler.cs
index 750d11b7..bffd943a 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Operation/EntitySetOperationHandler.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/Operation/EntitySetOperationHandler.cs
@@ -8,6 +8,7 @@
 using Microsoft.OpenApi.Models;
 using Microsoft.OpenApi.OData.Common;
 using Microsoft.OpenApi.OData.Edm;
+using Microsoft.OpenApi.OData.Vocabulary.Core;
 
 namespace Microsoft.OpenApi.OData.Operation
 {
@@ -56,5 +57,18 @@ protected override void SetExtensions(OpenApiOperation operation)
 
             base.SetExtensions(operation);
         }
+
+        /// <inheritdoc/>
+        protected override void SetExternalDocs(OpenApiOperation operation)
+        {
+            if (Context.Settings.ShowExternalDocs && Context.Model.GetLinkRecord(EntitySet, CustomLinkRel) is Link externalDocs)
+            {
+                operation.ExternalDocs = new OpenApiExternalDocs()
+                {
+                    Description = CoreConstants.ExternalDocsDescription,
+                    Url = externalDocs.Href
+                };
+            }
+        }
     }
 }
diff --git a/src/Microsoft.OpenApi.OData.Reader/Operation/MediaEntityOperationalHandler.cs b/src/Microsoft.OpenApi.OData.Reader/Operation/MediaEntityOperationalHandler.cs
index a14c75de..85e150ae 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Operation/MediaEntityOperationalHandler.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/Operation/MediaEntityOperationalHandler.cs
@@ -10,6 +10,7 @@
 using Microsoft.OpenApi.OData.Common;
 using Microsoft.OpenApi.OData.Edm;
 using Microsoft.OpenApi.OData.Vocabulary.Capabilities;
+using Microsoft.OpenApi.OData.Vocabulary.Core;
 using System.Collections.Generic;
 using System.Linq;
 
@@ -24,7 +25,7 @@ internal abstract class MediaEntityOperationalHandler : NavigationPropertyOperat
         /// Gets/Sets the NavigationSource segment
         /// </summary>
         protected ODataNavigationSourceSegment NavigationSourceSegment { get; private set; }
-
+    
         /// <summary>
         /// Gets/Sets flag indicating whether path is navigation property path
         /// </summary>
@@ -204,5 +205,18 @@ private IEdmNavigationProperty GetNavigationProperty(IEdmEntityType entityType,
         {
             return entityType.DeclaredNavigationProperties().FirstOrDefault(x => x.Name.Equals(identifier));
         }
+
+        protected override void SetExternalDocs(OpenApiOperation operation)
+        {
+            if (Context.Settings.ShowExternalDocs && IsNavigationPropertyPath &&
+                Context.Model.GetLinkRecord(NavigationProperty, CustomLinkRel) is Link externalDocs)
+            {
+                operation.ExternalDocs = new OpenApiExternalDocs()
+                {
+                    Description = CoreConstants.ExternalDocsDescription,
+                    Url = externalDocs.Href
+                };
+            }
+        }
     }
 }
diff --git a/src/Microsoft.OpenApi.OData.Reader/Operation/NavigationPropertyOperationHandler.cs b/src/Microsoft.OpenApi.OData.Reader/Operation/NavigationPropertyOperationHandler.cs
index ff1079a8..59d26222 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Operation/NavigationPropertyOperationHandler.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/Operation/NavigationPropertyOperationHandler.cs
@@ -12,6 +12,7 @@
 using Microsoft.OpenApi.OData.Edm;
 using Microsoft.OpenApi.OData.Vocabulary;
 using Microsoft.OpenApi.OData.Vocabulary.Capabilities;
+using Microsoft.OpenApi.OData.Vocabulary.Core;
 
 namespace Microsoft.OpenApi.OData.Operation
 {
@@ -156,6 +157,19 @@ protected string GetOperationId(string prefix = null)
             return string.Join(".", items);
         }
 
+        /// <inheritdoc/>
+        protected override void SetExternalDocs(OpenApiOperation operation)
+        {
+            if (Context.Settings.ShowExternalDocs && Context.Model.GetLinkRecord(NavigationProperty, CustomLinkRel) is Link externalDocs)
+            {
+                operation.ExternalDocs = new OpenApiExternalDocs()
+                { 
+                    Description = CoreConstants.ExternalDocsDescription, 
+                    Url = externalDocs.Href 
+                };
+            }
+        }
+            
         /// <summary>
         /// Retrieves the CRUD restrictions annotations for the navigation property
         /// in context, given a capability annotation term.
diff --git a/src/Microsoft.OpenApi.OData.Reader/Operation/OperationHandler.cs b/src/Microsoft.OpenApi.OData.Reader/Operation/OperationHandler.cs
index 510314fe..7d47d8f8 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Operation/OperationHandler.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/Operation/OperationHandler.cs
@@ -3,6 +3,7 @@
 //  Licensed under the MIT License (MIT). See LICENSE in the repo root for license information.
 // ------------------------------------------------------------
 
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using Microsoft.OpenApi.Any;
@@ -11,6 +12,7 @@
 using Microsoft.OpenApi.OData.Edm;
 using Microsoft.OpenApi.OData.Generator;
 using Microsoft.OpenApi.OData.Vocabulary.Capabilities;
+using Microsoft.OpenApi.OData.Vocabulary.Core;
 
 namespace Microsoft.OpenApi.OData.Operation
 {
@@ -47,6 +49,9 @@ public virtual OpenApiOperation CreateOperation(ODataContext context, ODataPath
             SetBasicInfo(operation);
             SetDeprecation(operation);
 
+            // ExternalDocs
+            SetExternalDocs(operation);
+
             // Security
             SetSecurity(operation);
 
@@ -68,12 +73,13 @@ will be used in the Responses when creating Links.
             // Extensions
             SetExtensions(operation);
 
+
             return operation;
         }
 
         private void SetDeprecation(OpenApiOperation operation)
         {
-            if(operation != null && Context.Settings.EnableDeprecationInformation)
+            if (operation != null && Context.Settings.EnableDeprecationInformation)
             {
                 var deprecationInfo = Path.SelectMany(x => x.GetAnnotables())
                                     .SelectMany(x => Context.GetDeprecationInformations(x))
@@ -82,7 +88,7 @@ private void SetDeprecation(OpenApiOperation operation)
                                     .ThenByDescending(x => x.RemovalDate)
                                     .FirstOrDefault();
 
-                if(deprecationInfo != null)
+                if (deprecationInfo != null)
                 {
                     operation.Deprecated = true;
                     var deprecationDetails = deprecationInfo.GetOpenApiExtension();
@@ -101,6 +107,11 @@ private void SetDeprecation(OpenApiOperation operation)
         /// </summary>
         protected ODataPath Path { get; private set; }
 
+        /// <summary>
+        /// Gets the custom link relation type for path based on operation type
+        /// </summary>
+        protected string CustomLinkRel { get; set; }
+
         /// <summary>
         /// Initialize the handler.
         /// It should be call ahead of in derived class.
@@ -108,7 +119,9 @@ private void SetDeprecation(OpenApiOperation operation)
         /// <param name="context">The context.</param>
         /// <param name="path">The path.</param>
         protected virtual void Initialize(ODataContext context, ODataPath path)
-        { }
+        {
+            SetCustomLinkRelType();
+        }
 
         /// <summary>
         /// Set the basic information for <see cref="OpenApiOperation"/>.
@@ -177,21 +190,26 @@ protected virtual void SetTags(OpenApiOperation operation)
         protected virtual void SetExtensions(OpenApiOperation operation)
         { }
 
+        /// <summary>
+        /// Set the ExternalDocs information for <see cref="OpenApiOperation"/>.
+        /// </summary>
+        /// <param name="operation">The <see cref="OpenApiOperation"/>.</param>
+        protected virtual void SetExternalDocs(OpenApiOperation operation)
+        { }
+
         /// <summary>
         /// Set the customized parameters for the operation.
         /// </summary>
         /// <param name="operation">The operation.</param>
         protected virtual void AppendCustomParameters(OpenApiOperation operation)
-        {
-        }
+        { }
 
         /// <summary>
         /// Set the addition annotation for the response.
         /// </summary>
         /// <param name="operation">The operation.</param>
         protected virtual void AppendHttpResponses(OpenApiOperation operation)
-        {
-        }
+        { }
 
         /// <summary>
         /// Sets the custom parameters.
@@ -246,5 +264,29 @@ protected static void AppendCustomParameters(OpenApiOperation operation, IList<C
                 operation.Parameters.AppendParameter(parameter);
             }
         }
+
+        /// <summary>
+        /// Set link relation type to be used to get external docs link for path operation
+        /// </summary>
+        protected virtual void SetCustomLinkRelType()
+        {
+            if (Context.Settings.CustomHttpMethodLinkRelMapping != null)
+            {
+                LinkRelKey? key = OperationType switch
+                {
+                    OperationType.Get => Path.LastSegment?.Kind ==  ODataSegmentKind.Key ? LinkRelKey.ReadByKey : LinkRelKey.List,
+                    OperationType.Post => LinkRelKey.Create,
+                    OperationType.Patch => LinkRelKey.Update,
+                    OperationType.Delete => LinkRelKey.Delete,
+                    _ => null,
+                };
+
+                if (key != null)
+                {
+                    Context.Settings.CustomHttpMethodLinkRelMapping.TryGetValue((LinkRelKey)key, out string linkRelValue);
+                    CustomLinkRel = linkRelValue;
+                }
+            }
+        }
     }
 }
diff --git a/src/Microsoft.OpenApi.OData.Reader/Operation/SingletonOperationHandler.cs b/src/Microsoft.OpenApi.OData.Reader/Operation/SingletonOperationHandler.cs
index ff1b049a..393f77bc 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Operation/SingletonOperationHandler.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/Operation/SingletonOperationHandler.cs
@@ -8,6 +8,7 @@
 using Microsoft.OpenApi.Models;
 using Microsoft.OpenApi.OData.Common;
 using Microsoft.OpenApi.OData.Edm;
+using Microsoft.OpenApi.OData.Vocabulary.Core;
 
 namespace Microsoft.OpenApi.OData.Operation
 {
@@ -60,5 +61,18 @@ protected override void SetExtensions(OpenApiOperation operation)
 
             base.SetExtensions(operation);
         }
+
+        /// <inheritdoc/>
+        protected override void SetExternalDocs(OpenApiOperation operation)
+        {
+            if (Context.Settings.ShowExternalDocs && Context.Model.GetLinkRecord(Singleton, CustomLinkRel) is Link externalDocs)
+            {
+                operation.ExternalDocs = new OpenApiExternalDocs() 
+                { 
+                    Description = CoreConstants.ExternalDocsDescription, 
+                    Url = externalDocs.Href 
+                };
+            }
+        }
     }
 }
diff --git a/src/Microsoft.OpenApi.OData.Reader/PublicAPI.Unshipped.txt b/src/Microsoft.OpenApi.OData.Reader/PublicAPI.Unshipped.txt
index 9ec0d341..56210bd2 100644
--- a/src/Microsoft.OpenApi.OData.Reader/PublicAPI.Unshipped.txt
+++ b/src/Microsoft.OpenApi.OData.Reader/PublicAPI.Unshipped.txt
@@ -7,14 +7,26 @@ Microsoft.OpenApi.OData.Edm.EdmModelExtensions
 Microsoft.OpenApi.OData.Edm.EdmTypeExtensions
 Microsoft.OpenApi.OData.OpenApiConvertSettings.AppendBoundOperationsOnDerivedTypeCastSegments.get -> bool
 Microsoft.OpenApi.OData.OpenApiConvertSettings.AppendBoundOperationsOnDerivedTypeCastSegments.set -> void
+Microsoft.OpenApi.OData.OpenApiConvertSettings.CustomHttpMethodLinkRelMapping.get -> System.Collections.Generic.Dictionary<Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey, string>
+Microsoft.OpenApi.OData.OpenApiConvertSettings.CustomHttpMethodLinkRelMapping.set -> void
 Microsoft.OpenApi.OData.OpenApiConvertSettings.ExpandDerivedTypesNavigationProperties.get -> bool
 Microsoft.OpenApi.OData.OpenApiConvertSettings.ExpandDerivedTypesNavigationProperties.set -> void
 Microsoft.OpenApi.OData.OpenApiConvertSettings.CustomXMLAttributesMapping.get -> System.Collections.Generic.Dictionary<string, string>
 Microsoft.OpenApi.OData.OpenApiConvertSettings.CustomXMLAttributesMapping.set -> void
 Microsoft.OpenApi.OData.OpenApiConvertSettings.RequireRestrictionAnnotationsToGenerateComplexPropertyPaths.get -> bool
 Microsoft.OpenApi.OData.OpenApiConvertSettings.RequireRestrictionAnnotationsToGenerateComplexPropertyPaths.set -> void
+Microsoft.OpenApi.OData.OpenApiConvertSettings.ShowExternalDocs.get -> bool
+Microsoft.OpenApi.OData.OpenApiConvertSettings.ShowExternalDocs.set -> void
 Microsoft.OpenApi.OData.OpenApiConvertSettings.UseSuccessStatusCodeRange.get -> bool
 Microsoft.OpenApi.OData.OpenApiConvertSettings.UseSuccessStatusCodeRange.set -> void
+Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey
+Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey.Action = 6 -> Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey
+Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey.Create = 2 -> Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey
+Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey.Delete = 4 -> Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey
+Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey.Function = 5 -> Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey
+Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey.List = 1 -> Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey
+Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey.ReadByKey = 0 -> Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey
+Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey.Update = 3 -> Microsoft.OpenApi.OData.Vocabulary.Core.LinkRelKey
 static Microsoft.OpenApi.OData.Common.OpenApiOperationExtensions.AddErrorResponses(this Microsoft.OpenApi.Models.OpenApiOperation operation, Microsoft.OpenApi.OData.OpenApiConvertSettings settings, bool addNoContent = false, Microsoft.OpenApi.Models.OpenApiSchema schema = null) -> void
 static Microsoft.OpenApi.OData.Edm.EdmTypeExtensions.ShouldPathParameterBeQuoted(this Microsoft.OData.Edm.IEdmType edmType, Microsoft.OpenApi.OData.OpenApiConvertSettings settings) -> bool
 Microsoft.OpenApi.OData.Edm.IODataPathProvider
diff --git a/src/Microsoft.OpenApi.OData.Reader/Vocabulary/Core/CoreConstants.cs b/src/Microsoft.OpenApi.OData.Reader/Vocabulary/Core/CoreConstants.cs
new file mode 100644
index 00000000..3847db4f
--- /dev/null
+++ b/src/Microsoft.OpenApi.OData.Reader/Vocabulary/Core/CoreConstants.cs
@@ -0,0 +1,28 @@
+// ------------------------------------------------------------
+//  Copyright (c) Microsoft Corporation.  All rights reserved.
+//  Licensed under the MIT License (MIT). See LICENSE in the repo root for license information.
+// -----------------------------------------------------------
+
+namespace Microsoft.OpenApi.OData.Vocabulary.Core
+{
+    /// <summary>
+    /// Constants for the Core vocabulary
+    /// </summary>
+    internal static class CoreConstants
+    {
+        /// <summary>
+        /// Org.OData.Core.V1.Links
+        /// </summary>
+        public const string Links = "Org.OData.Core.V1.Links";
+
+        /// <summary>
+        /// Org.OData.Core.V1.Revisions
+        /// </summary>
+        public const string Revisions = "Org.OData.Core.V1.Revisions";
+
+        /// <summary>
+        /// External docs description.
+        /// </summary>
+        public const string ExternalDocsDescription = "Find more info here";
+    }
+}
diff --git a/src/Microsoft.OpenApi.OData.Reader/Vocabulary/Core/Link.cs b/src/Microsoft.OpenApi.OData.Reader/Vocabulary/Core/Link.cs
new file mode 100644
index 00000000..211de695
--- /dev/null
+++ b/src/Microsoft.OpenApi.OData.Reader/Vocabulary/Core/Link.cs
@@ -0,0 +1,40 @@
+// ------------------------------------------------------------
+//  Copyright (c) Microsoft Corporation.  All rights reserved.
+//  Licensed under the MIT License (MIT). See LICENSE in the repo root for license information.
+// ------------------------------------------------------------
+
+using Microsoft.OData.Edm.Vocabularies;
+using Microsoft.OpenApi.OData.Common;
+using Microsoft.OpenApi.OData.Edm;
+using System;
+
+namespace Microsoft.OpenApi.OData.Vocabulary.Core
+{
+    /// <summary>
+    /// Complex Type: Org.OData.Core.V1.Link
+    /// </summary>
+    [Term("Org.OData.Core.V1.Links")]
+    internal class Link : IRecord
+    {
+        /// <summary>
+        /// The link relation type.
+        /// </summary>
+        public string Rel { get; private set; }
+
+        /// <summary>
+        /// The link to the documentation.
+        /// </summary>
+        public Uri Href { get; private set; }
+
+        /// <summary>
+        /// Init the <see cref="Link"/>.
+        /// </summary>
+        /// <param name="record"></param>
+        public virtual void Initialize(IEdmRecordExpression record)
+        {
+            Utils.CheckArgumentNull(record, nameof(record));
+            Rel = record.GetString("rel");
+            Href = new Uri(record.GetString("href"));
+        }
+    }
+}
diff --git a/src/Microsoft.OpenApi.OData.Reader/Vocabulary/Core/LinkRelKey.cs b/src/Microsoft.OpenApi.OData.Reader/Vocabulary/Core/LinkRelKey.cs
new file mode 100644
index 00000000..833a46b6
--- /dev/null
+++ b/src/Microsoft.OpenApi.OData.Reader/Vocabulary/Core/LinkRelKey.cs
@@ -0,0 +1,44 @@
+namespace Microsoft.OpenApi.OData.Vocabulary.Core
+{
+
+    /// <summary>
+    /// Custom link relation type keys
+    /// </summary>
+    public enum LinkRelKey
+    {
+        /// <summary>
+        /// Identifies external documentation for a GET operation on an entity.
+        /// </summary>
+        ReadByKey,
+
+        /// <summary>
+        /// Identifies external documentation for a GET operation on an entity set.
+        /// </summary>
+        List,
+
+        /// <summary>
+        /// Identifies external documentation for a POST operation.
+        /// </summary>
+        Create,
+
+        /// <summary>
+        /// Identifies external documentation for a PATCH operation.
+        /// </summary>
+        Update,
+
+        /// <summary>
+        /// Identifies external documentation for a DELETE operation.
+        /// </summary>
+        Delete,
+
+        /// <summary>
+        /// Identifies external documentation for a function.
+        /// </summary>
+        Function,
+
+        /// <summary>
+        /// Identifies external documentation for an action.
+        /// </summary>
+        Action
+    }
+}