diff --git a/.github/workflows/swift.yml b/.github/workflows/swift.yml
index 8276154..9686010 100644
--- a/.github/workflows/swift.yml
+++ b/.github/workflows/swift.yml
@@ -2,8 +2,12 @@
 # For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-swift
 
 name: Swift
-
-on: [push]
+on:
+  pull_request:
+    types: [opened, reopened]
+  push:
+    branches: ['main']
+    tags: [ v* ]
 
 jobs:
   build:
diff --git a/Sources/MdocDataTransfer18013/BLETransfer/MdocGATTServer.swift b/Sources/MdocDataTransfer18013/BLETransfer/MdocGATTServer.swift
index 7665f32..e40a9cf 100644
--- a/Sources/MdocDataTransfer18013/BLETransfer/MdocGATTServer.swift
+++ b/Sources/MdocDataTransfer18013/BLETransfer/MdocGATTServer.swift
@@ -65,7 +65,7 @@ public class MdocGattServer: @unchecked Sendable, ObservableObject {
 	}
 	
 	@objc(CBPeripheralManagerDelegate)
-	class Delegate: NSObject, @preconcurrency CBPeripheralManagerDelegate {
+	class Delegate: NSObject, CBPeripheralManagerDelegate {
 		unowned var server: MdocGattServer
 		
 		init(server: MdocGattServer) {
@@ -267,6 +267,7 @@ public class MdocGattServer: @unchecked Sendable, ObservableObject {
 				}
 			}
 			catch { errorToSend = error }
+			if let errorToSend { logger.error("Error preparing response: \(errorToSend.localizedDescription)") }
 		}
 	}
 	
diff --git a/Sources/MdocDataTransfer18013/MdocHelpers.swift b/Sources/MdocDataTransfer18013/MdocHelpers.swift
index f154e32..7fe0b4c 100644
--- a/Sources/MdocDataTransfer18013/MdocHelpers.swift
+++ b/Sources/MdocDataTransfer18013/MdocHelpers.swift
@@ -28,7 +28,7 @@ import SwiftCBOR
 import Logging
 import X509
 
-public typealias RequestItems = [String: [String: [String]]]
+public typealias RequestItems = [String: [String: [RequestItem]]]
 
 /// Helper methods
 public class MdocHelpers {
@@ -157,11 +157,11 @@ public class MdocHelpers {
 			guard let issuerNs = doc.issuerNameSpaces else { logger.error("Document does not contain issuer namespaces"); return nil }
 			var nsItemsToAdd = [NameSpace: [IssuerSignedItem]]()
 			var nsErrorsToAdd = [NameSpace: ErrorItems]()
-			var validReqItemsNsDict = [NameSpace: [String]]()
+			var validReqItemsNsDict = [NameSpace: [RequestItem]]()
 			// for each request namespace
 			let reqNamespaces = if haveSelectedItems { Array(selectedItems![reqDocIdOrDocType]!.keys)} else {  Array(docReq!.itemsRequest.requestNameSpaces.nameSpaces.keys) }
 			for reqNamespace in reqNamespaces {
-				let reqElementIdentifiers = if haveSelectedItems { Array(selectedItems![reqDocIdOrDocType]![reqNamespace]!)} else { docReq!.itemsRequest.requestNameSpaces.nameSpaces[reqNamespace]!.elementIdentifiers }
+				let reqElementIdentifiers = if haveSelectedItems { Array(selectedItems![reqDocIdOrDocType]![reqNamespace]!).map(\.elementIdentifier) } else { docReq!.itemsRequest.requestNameSpaces.nameSpaces[reqNamespace]!.elementIdentifiers }
 				guard let items = issuerNs[reqNamespace] else {
 					nsErrorsToAdd[reqNamespace] = Dictionary(grouping: reqElementIdentifiers, by: {$0}).mapValues { _ in 0 }
 					continue
@@ -172,11 +172,11 @@ public class MdocHelpers {
 				var itemsToAdd = items.filter({ itemsReqSet.contains($0.elementIdentifier) })
 				if let selectedItems {
 					let selectedNsItems = selectedItems[reqDocIdOrDocType]?[reqNamespace] ?? []
-					itemsToAdd = itemsToAdd.filter({ selectedNsItems.contains($0.elementIdentifier) })
+					itemsToAdd = itemsToAdd.filter({ selectedNsItems.map(\.elementIdentifier).contains($0.elementIdentifier) })
 				}
 				if itemsToAdd.count > 0 {
 					nsItemsToAdd[reqNamespace] = itemsToAdd
-					validReqItemsNsDict[reqNamespace] = itemsToAdd.map(\.elementIdentifier)
+					validReqItemsNsDict[reqNamespace] = itemsToAdd.map { RequestItem(elementIdentifier: $0.elementIdentifier, intentToRetail: docReq?.itemsRequest.requestNameSpaces.nameSpaces[reqNamespace]?.dataElements[$0.elementIdentifier] ?? false, isOptional: false) }
 				}
 				let errorItemsSet = itemsReqSet.subtracting(itemsSet)
 				if errorItemsSet.count > 0 {
@@ -203,7 +203,7 @@ public class MdocHelpers {
 			} else {
 				docErrors.append([doc.issuerAuth.mso.docType: UInt64(0)])
 			}
-			errorReqItemsDocDict[doc.issuerAuth.mso.docType] = nsErrorsToAdd.mapValues { Array($0.keys) }
+			errorReqItemsDocDict[doc.issuerAuth.mso.docType] = nsErrorsToAdd.mapValues { $0.keys.map(RequestItem.init) }
 		} // end doc for
 		let documentErrors: [DocumentError]? = docErrors.count == 0 ? nil : docErrors.map(DocumentError.init(docErrors:))
 		let documentsToAdd = docFiltered.count == 0 ? nil : docFiltered
diff --git a/Sources/MdocDataTransfer18013/RequestItem.swift b/Sources/MdocDataTransfer18013/RequestItem.swift
new file mode 100644
index 0000000..8be8c69
--- /dev/null
+++ b/Sources/MdocDataTransfer18013/RequestItem.swift
@@ -0,0 +1,33 @@
+/*
+Copyright (c) 2023 European Commission
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+		http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+import Foundation
+
+public struct RequestItem: Sendable {
+    public init(elementIdentifier: String, intentToRetail: Bool, isOptional: Bool) {
+        self.elementIdentifier = elementIdentifier
+        self.intentToRetail = intentToRetail
+        self.isOptional = isOptional
+    }
+    public init(elementIdentifier: String) {
+        self.elementIdentifier = elementIdentifier
+        self.intentToRetail = false
+        self.isOptional = false
+    }
+
+    let elementIdentifier: String
+    let intentToRetail: Bool
+    let isOptional: Bool
+}