diff --git a/addressbook/inc/class.addressbook_groupdav.inc.php b/addressbook/inc/class.addressbook_groupdav.inc.php
index 75f7bd2804..aecac673ef 100644
--- a/addressbook/inc/class.addressbook_groupdav.inc.php
+++ b/addressbook/inc/class.addressbook_groupdav.inc.php
@@ -61,6 +61,11 @@ class addressbook_groupdav extends Api\CalDAV\Handler
 	 */
 	var $home_set_pref;
 
+	/**
+	 * Prefix for JsCardGroup id
+	 */
+	const JS_CARDGROUP_ID_PREFIX = 'list-';
+
 	/**
 	 * Constructor
 	 *
@@ -350,7 +355,7 @@ class addressbook_groupdav extends Api\CalDAV\Handler
 				{
 					foreach($lists as $list)
 					{
-						$list[self::$path_attr] = $is_jscontact ? 'list-'.$list['list_id'] : $list['list_carddav_name'];
+						$list[self::$path_attr] = $is_jscontact ? self::JS_CARDGROUP_ID_PREFIX.$list['list_id'] : $list['list_carddav_name'];
 						$etag = $list['list_id'].':'.$list['list_etag'];
 						// for all-in-one addressbook, add selected ABs to etag
 						if (isset($filter['owner']) && is_array($filter['owner']))
@@ -637,9 +642,33 @@ class addressbook_groupdav extends Api\CalDAV\Handler
 			return $oldContact;
 		}
 
-		if (Api\CalDAV::isJSON())
+		$type = null;
+		if (($is_json=Api\CalDAV::isJSON($type)))
 		{
-			$contact = JsContact::parseJsCard($options['content']);
+			if (strpos($type, JsContact::MIME_TYPE_JSCARD) === false && strpos($type, JsContact::MIME_TYPE_JSCARDGROUP) === false)
+			{
+				if (!empty($id))
+				{
+					$type = strpos($id, self::JS_CARDGROUP_ID_PREFIX) === 0 ? JsContact::MIME_TYPE_JSCARDGROUP : JsContact::MIME_TYPE_JSCARD;
+				}
+				else
+				{
+					$json = json_decode($options['content'], true);
+					$type = is_array($json['members']) ? JsContact::MIME_TYPE_JSCARDGROUP : JsContact::MIME_TYPE_JSCARD;
+				}
+			}
+			$contact = $type === JsContact::MIME_TYPE_JSCARD ?
+				JsContact::parseJsCard($options['content']) : JsContact::parseJsCardGroup($options['content']);
+
+			if (!empty($id) && strpos($id, self::JS_CARDGROUP_ID_PREFIX) === 0)
+			{
+				$id = substr($id, strlen(self::JS_CARDGROUP_ID_PREFIX));
+			}
+			elseif (empty($id))
+			{
+				$contact['cardav_name'] = $contact['uid'].'.vcf';
+				$contact['owner'] = $user;
+			}
 
 			/* uncomment to return parsed data for testing
 			header('Content-Type: application/json');
@@ -687,7 +716,7 @@ class addressbook_groupdav extends Api\CalDAV\Handler
 			$contactId = -1;
 			$retval = '201 Created';
 		}
-		$is_group = $contact['##X-ADDRESSBOOKSERVER-KIND'] == 'group';
+		$is_group = isset($type) && $type === JsContact::MIME_TYPE_JSCARDGROUP || $contact['##X-ADDRESSBOOKSERVER-KIND'] === 'group';
 		if ($oldContact && $is_group !== isset($oldContact['list_id']))
 		{
 			throw new Api\Exception\AssertionFailed(__METHOD__."(,'$id',$user,'$prefix') can contact into group or visa-versa!");
@@ -756,7 +785,7 @@ class addressbook_groupdav extends Api\CalDAV\Handler
 		if ($this->http_if_match) $contact['etag'] = self::etag2value($this->http_if_match);
 
 		// ignore photo for JSON/REST, it's not yet supported
-		$contact['photo_unchanged'] = Api\CalDAV::isJSON(); //false;	// photo needs saving
+		$contact['photo_unchanged'] = $is_json; //false;	// photo needs saving
 		if (!($save_ok = $is_group ? $this->save_group($contact, $oldContact) : $this->bo->save($contact)))
 		{
 			if ($this->debug) error_log(__METHOD__."(,$id) save(".array2string($contact).") failed, Ok=$save_ok");
@@ -775,7 +804,7 @@ class addressbook_groupdav extends Api\CalDAV\Handler
 			{
 				if (($contact = $this->bo->read_list($save_ok)))
 				{
-					// re-read group to get correct etag (not dublicate etag code here)
+					// re-read group to get correct etag (not duplicate etag code here)
 					$contact = $this->read($contact['list_'.self::$path_attr], $options['path']);
 				}
 			}
@@ -787,14 +816,17 @@ class addressbook_groupdav extends Api\CalDAV\Handler
 		}
 
 		// send evtl. necessary response headers: Location, etag, ...
-		$this->put_response_headers($contact, $options['path'], $retval, self::$path_attr != 'id');
+		$this->put_response_headers($contact, $options['path'], $retval,
+			// JSON uses 'id', while CardDAV uses carddav_name !== 'id'
+			(self::$path_attr !== 'id') === !$is_json, null,
+			$is_group && $is_json ? self::JS_CARDGROUP_ID_PREFIX : '');
 
 		if ($this->debug > 1) error_log(__METHOD__."(,'$id', $user, '$prefix') returning ".array2string($retval));
 		return $retval;
 	}
 
 	/**
-	 * Save distribition-list / group
+	 * Save distribution-list / group
 	 *
 	 * @param array $contact
 	 * @param array|false $oldContact
@@ -813,18 +845,21 @@ class addressbook_groupdav extends Api\CalDAV\Handler
 			$contact['owner'], null, $data)))
 		{
 			// update members given in $contact['##X-ADDRESSBOOKSERVER-MEMBER']
-			$new_members = $contact['##X-ADDRESSBOOKSERVER-MEMBER'];
-			if ($new_members[1] == ':' && ($n = unserialize($new_members)))
+			$new_members = $contact['members'] ?: $contact['##X-ADDRESSBOOKSERVER-MEMBER'];
+			if (is_string($new_members) && $new_members[1] === ':' && ($n = unserialize($new_members)))
 			{
 				$new_members = $n['values'];
 			}
 			else
 			{
-				$new_members = array($new_members);
+				$new_members = (array)$new_members;
 			}
 			foreach($new_members as &$uid)
 			{
-				$uid = substr($uid,9);	// cut off "urn:uuid:" prefix
+				if (substr($uid, 0, 9) === 'urn:uuid:')
+				{
+					$uid = substr($uid,9);	// cut off "urn:uuid:" prefix
+				}
 			}
 			if ($oldContact)
 			{
@@ -861,7 +896,7 @@ class addressbook_groupdav extends Api\CalDAV\Handler
 			// reread as update of list-members updates etag and modified
 			if (($contact = $this->bo->read_list($list_id)))
 			{
-				// re-read group to get correct etag (not dublicate etag code here)
+				// re-read group to get correct etag (not duplicate etag code here)
 				$contact = $this->read($contact['list_'.self::$path_attr]);
 			}
 		}
@@ -1059,7 +1094,7 @@ class addressbook_groupdav extends Api\CalDAV\Handler
 		$keys = ['tid' => $non_deleted_tids];
 
 		// with REST/JSON we only use our id, but DELETE request has neither Accept nor Content-Type header to detect JSON request
-		if (preg_match('/^(list-)?(\d+)$/', $id, $matches))
+		if (preg_match('/^('.self::JS_CARDGROUP_ID_PREFIX.')?(\d+)$/', $id, $matches))
 		{
 			if (!empty($matches[1]))
 			{
diff --git a/api/src/CalDAV.php b/api/src/CalDAV.php
index a9e97289e4..5a0f0dc62d 100644
--- a/api/src/CalDAV.php
+++ b/api/src/CalDAV.php
@@ -996,9 +996,10 @@ class CalDAV extends HTTP_WebDAV_Server
 	/**
 	 * Check if client want or sends JSON
 	 *
+	 * @param string &$type=null
 	 * @return bool|string false: no json, true: application/json, string: application/(string)+json
 	 */
-	public static function isJSON(string $type=null)
+	public static function isJSON(string &$type=null)
 	{
 		if (!isset($type))
 		{
diff --git a/api/src/CalDAV/Handler.php b/api/src/CalDAV/Handler.php
index 440984de0f..6c360a769a 100644
--- a/api/src/CalDAV/Handler.php
+++ b/api/src/CalDAV/Handler.php
@@ -570,8 +570,9 @@ abstract class Handler
 	 * @param int|string $retval
 	 * @param boolean $path_attr_is_name =true true: path_attr is ca(l|rd)dav_name, false: id (GroupDAV needs Location header)
 	 * @param string $etag =null etag, to not calculate it again (if != null)
+	 * @param string $prefix='' prefix for id
 	 */
-	function put_response_headers($entry, $path, $retval, $path_attr_is_name=true, $etag=null)
+	function put_response_headers($entry, $path, $retval, $path_attr_is_name=true, $etag=null, string $prefix='')
 	{
 		//error_log(__METHOD__."(".array2string($entry).", '$path', ".array2string($retval).", path_attr_is_name=$path_attr_is_name, etag=".array2string($etag).")");
 		// we should not return an etag here, as EGroupware never stores ical/vcard byte-by-byte
@@ -589,9 +590,9 @@ abstract class Handler
 		// send Location header only on success AND if we dont use caldav_name as path-attribute or
 		if ((is_bool($retval) ? $retval : $retval[0] === '2') && (!$path_attr_is_name ||
 			// POST with add-member query parameter
-			$_SERVER['REQUEST_METHOD'] == 'POST' && isset($_GET['add-member'])) ||
-			// in case we choose to use a different name for the resourece, give the client a hint
-			basename($path) !== $this->new_id)
+			$_SERVER['REQUEST_METHOD'] == 'POST') ||
+			// in case we choose to use a different name for the resource, give the client a hint
+			basename($path) !== $prefix.$this->new_id)
 		{
 			$path = preg_replace('|(.*)/[^/]*|', '\1/', $path);
 			header('Location: '.$this->base_uri.$path.$this->new_id);
diff --git a/api/src/Contacts/JsContact.php b/api/src/Contacts/JsContact.php
index b6b0feeb94..a5d71b647e 100644
--- a/api/src/Contacts/JsContact.php
+++ b/api/src/Contacts/JsContact.php
@@ -41,14 +41,14 @@ class JsContact
 			throw new Api\Exception\NotFound();
 		}
 		$data = array_filter([
-			'uid' => $contact['uid'],
+			'uid' => self::uid($contact['uid']),
 			'prodId' => 'EGroupware Addressbook '.$GLOBALS['egw_info']['apps']['api']['version'],
 			'created' => self::UTCDateTime($contact['created']),
 			'updated' => self::UTCDateTime($contact['modified']),
 			//'kind' => '', // 'individual' or 'org'
 			//'relatedTo' => [],
 			'name' => self::nameComponents($contact),
-			'fullName' => self::localizedString($contact['n_fn']),
+			'fullName' => $contact['n_fn'],
 			//'nickNames' => [],
 			'organizations' => array_filter(['org' => self::organization($contact)]),
 			'titles' => self::titles($contact),
@@ -74,11 +74,11 @@ class JsContact
 			]),
 			'photos' => self::photos($contact),
 			'anniversaries' => self::anniversaries($contact),
-			'notes' => empty($contact['note']) ? null : [self::localizedString($contact['note'])],
+			'notes' => empty($contact['note']) ? null : [$contact['note']],
 			'categories' => self::categories($contact['cat_id']),
-			'egroupware.org/customfields' => self::customfields($contact),
-			'egroupware.org/assistant' => $contact['assistent'],
-			'egroupware.org/fileAs' => $contact['fileas'],
+			'egroupware.org:customfields' => self::customfields($contact),
+			'egroupware.org:assistant' => $contact['assistent'],
+			'egroupware.org:fileAs' => $contact['fileas'],
 		]);
 		if ($encode)
 		{
@@ -119,7 +119,7 @@ class JsContact
 						break;
 
 					case 'fullName':
-						$contact['n_fn'] = self::parseLocalizedString($value);
+						$contact['n_fn'] = self::parseString($value);
 						break;
 
 					case 'organizations':
@@ -156,7 +156,7 @@ class JsContact
 
 					case 'notes':
 						$contact['note'] = implode("\n", array_map(static function ($note) {
-							return self::parseLocalizedString($note);
+							return self::parseString($note);
 						}, $value));
 						break;
 
@@ -164,15 +164,15 @@ class JsContact
 						$contact['cat_id'] = self::parseCategories($value);
 						break;
 
-					case 'egroupware.org/customfields':
+					case 'egroupware.org:customfields':
 						$contact += self::parseCustomfields($value);
 						break;
 
-					case 'egroupware.org/assistant':
+					case 'egroupware.org:assistant':
 						$contact['assistent'] = $value;
 						break;
 
-					case 'egroupware.org/fileAs':
+					case 'egroupware.org:fileAs':
 						$contact['fileas'] = $value;
 						break;
 
@@ -188,28 +188,47 @@ class JsContact
 				}
 			}
 		}
-		catch (\JsonException $e) {
-			throw new JsContactParseException("Error parsing JSON: ".$e->getMessage(), 422, $e);
-		}
-		catch (\InvalidArgumentException $e) {
-			throw new JsContactParseException("Error parsing JsContact field '$name': ".
-				str_replace('"', "'", $e->getMessage()), 422);
-		}
-		catch (\TypeError $e) {
-			$message = $e->getMessage();
-			if (preg_match('/must be of the type ([^ ]+), ([^ ]+) given/', $message, $matches))
-			{
-				$message = "$matches[1] expected, but got $matches[2]: ".
-					str_replace('"', "'", json_encode($value, self::JSON_OPTIONS_ERROR));
-			}
-			throw new JsContactParseException("Error parsing JsContact field '$name': $message", 422, $e);
-		}
 		catch (\Throwable $e) {
-			throw new JsContactParseException("Error parsing JsContact field '$name': ". $e->getMessage(), 422, $e);
+			self::handleExceptions($e, 'JsContact Card', $name, $value);
 		}
 		return $contact;
 	}
 
+	const URN_UUID_PREFIX = 'urn:uuid:';
+	const UUID_PREG = '/^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/i';
+
+	/**
+	 * Get UID with either "urn:uuid:" prefix for UUIDs or just the text
+	 *
+	 * @param string $uid
+	 * @return string
+	 */
+	protected static function uid(string $uid)
+	{
+		return preg_match(self::UUID_PREG, $uid) ? self::URN_UUID_PREFIX.$uid : $uid;
+	}
+
+	/**
+	 * Parse and optionally generate UID
+	 *
+	 * @param string|null $uid
+	 * @param bool $generate_when_empty true: generate UID if empty, false: throw error
+	 * @return string without urn:uuid: prefix
+	 * @throws \InvalidArgumentException
+	 */
+	protected static function parseUid(string $uid=null, $generate_when_empty=false)
+	{
+		if (empty($uid) || strlen($uid) < 12)
+		{
+			if (!$generate_when_empty)
+			{
+				throw new \InvalidArgumentException("Invalid or missing UID: ".json_encode($uid));
+			}
+			$uid = \HTTP_WebDAV_Server::_new_uuid();
+		}
+		return strpos($uid, self::URN_UUID_PREFIX) === 0 ? substr($uid, 9) : $uid;
+	}
+
 	/**
 	 * JSON options for errors thrown as exceptions
 	 */
@@ -229,8 +248,8 @@ class JsContact
 			return null;    // name is mandatory
 		}
 		return array_filter([
-			'name' => self::localizedString($contact['org_name']),
-			'units' => empty($contact['org_unit']) ? null : ['org_unit' => self::localizedString($contact['org_unit'])],
+			'name' => $contact['org_name'],
+			'units' => empty($contact['org_unit']) ? null : ['org_unit' => $contact['org_unit']],
 		]);
 	}
 
@@ -247,10 +266,10 @@ class JsContact
 		$contact = [];
 		foreach($orgas as $orga)
 		{
-			$contact['org_name'] = self::parseLocalizedString($orga['name']);
+			$contact['org_name'] = self::parseString($orga['name']);
 			$contact['org_unit'] = implode(' ', array_map(static function($unit)
 			{
-				return self::parseLocalizedString($unit);
+				return self::parseString($unit);
 			}, $orga['units']));
 			break;
 		}
@@ -270,8 +289,8 @@ class JsContact
 	protected static function titles(array $contact)
 	{
 		return array_filter([
-			'title' => self::localizedString($contact['title']),
-			'role' => self::localizedString($contact['role']),
+			'title' => $contact['title'],
+			'role' => $contact['role'],
 		]);
 	}
 
@@ -286,21 +305,21 @@ class JsContact
 		$contact = [];
 		if (isset($titles[$id='title']) || isset($contact[$id='jobTitle']))
 		{
-			$contact['title'] = self::parseLocalizedString($titles[$id]);
+			$contact['title'] = self::parseString($titles[$id]);
 			unset($titles[$id]);
 		}
 		if (isset($titles[$id='role']))
 		{
-			$contact['role'] = self::parseLocalizedString($titles[$id]);
+			$contact['role'] = self::parseString($titles[$id]);
 			unset($titles[$id]);
 		}
 		if (!isset($contact['title']) && $titles)
 		{
-			$contact['title'] = self::parseLocalizedString(array_shift($titles));
+			$contact['title'] = self::parseString(array_shift($titles));
 		}
 		if (!isset($contact['role']) && $titles)
 		{
-			$contact['role'] = self::parseLocalizedString(array_shift($titles));
+			$contact['role'] = self::parseString(array_shift($titles));
 		}
 		if (count($titles))
 		{
@@ -481,10 +500,10 @@ class JsContact
 			'street' => self::streetComponents($contact[$prefix.'street'], $contact[$prefix.'street2']),
 		]);
 		// only add contexts and preference to non-empty address
-		return !$address ? [] : $address+[
+		return !$address ? [] : array_filter($address+[
 			'contexts' => [$type => true],
 			'pref' => $preference,
-		];
+		]);
 	}
 
 	/**
@@ -946,16 +965,12 @@ class JsContact
 	 *
 	 * We're not currently storing/allowing any localization --> they get ignored/thrown away!
 	 *
-	 * @param array $value object with attribute "value"
+	 * @param string $value =null
 	 * @return string
 	 */
-	protected static function parseLocalizedString(array $value)
+	protected static function parseString(string $value=null)
 	{
-		if (!is_string($value['value']))
-		{
-			throw new \InvalidArgumentException("Invalid localizedString: ".json_encode($value, self::JSON_OPTIONS_ERROR));
-		}
-		return $value['value'];
+		return $value;
 	}
 
 	/**
@@ -996,10 +1011,10 @@ class JsContact
 			throw new Api\Exception\NotFound();
 		}
 		$data = array_filter([
-			'uid' => $group['list_uid'],
+			'uid' => self::uid($group['list_uid']),
 			'name' => $group['list_name'],
 			'card' => self::getJsCard([
-				'uid' => $group['list_uid'],
+				'uid' => self::uid($group['list_uid']),
 				'n_fn' => $group['list_name'],  // --> fullName
 				'modified' => $group['list_modified'],  // no other way to send modification date
 			], false),
@@ -1007,7 +1022,7 @@ class JsContact
 		]);
 		foreach($group['members'] as $uid)
 		{
-			$data['members'][$uid] = true;
+			$data['members'][self::uid($uid)] = true;
 		}
 		if ($encode)
 		{
@@ -1016,6 +1031,116 @@ class JsContact
 		return $data;
 	}
 
+	/**
+	 * Parse JsCard
+	 *
+	 * @param string $json
+	 * @return array
+	 */
+	public static function parseJsCardGroup(string $json)
+	{
+		try
+		{
+			$data = json_decode($json, true, 10, JSON_THROW_ON_ERROR);
+
+			if (!isset($data['uid'])) $data['uid'] = null;  // to fail below, if it does not exist
+
+			// make sure missing mandatory members give an error
+			$data += ['uid' => null, 'members' => null];
+			$group = [];
+			foreach ($data as $name => $value)
+			{
+				switch ($name)
+				{
+					case 'uid':
+						$group['uid'] = self::parseUid($value);
+						break;
+
+					case 'name':
+						$group['n_fn'] = $value;
+						break;
+
+					case 'card':
+						$card = self::parseJsCard(json_encode($value, self::JSON_OPTIONS_ERROR));
+						// prefer name over card-fullName
+						if (!empty($card['n_fn']) && empty($group['n_fn']))
+						{
+							$group['n_fn'] = $card['n_fn'];
+						}
+						break;
+
+					case 'members':
+						$group['members'] = self::parseMembers($value);
+						break;
+
+					default:
+						error_log(__METHOD__ . "() $name=" . json_encode($value, self::JSON_OPTIONS_ERROR) . ' --> ignored');
+						break;
+				}
+			}
+		}
+		catch (\Throwable $e) {
+			self::handleExceptions($e, 'JsContact CardGroup', $name, $value);
+		}
+		return $group;
+	}
+
+	/**
+	 * Parse members object
+	 *
+	 * @link https://datatracker.ietf.org/doc/html/draft-ietf-jmap-jscontact-07#section-3.1.2
+	 * @param array $values uid => true pairs
+	 * @return array of uid's
+	 */
+	protected static function parseMembers(array $values)
+	{
+		$members = [];
+		foreach($values as $uid => $value)
+		{
+			if (!is_string($uid) || $value !== true)
+			{
+				throw new \InvalidArgumentException('Invalid members object: '.json_encode($values, self::JSON_OPTIONS_ERROR));
+			}
+			$members[] = self::parseUid($uid);
+		}
+		return $members;
+	}
+
+	/**
+	 * Map all kind of exceptions while parsing to a JsContactParseException
+	 *
+	 * @param \Throwable $e
+	 * @param string $type
+	 * @param string $name
+	 * @param mixed $value
+	 * @throws JsContactParseException
+	 */
+	protected static function handleExceptions(\Throwable $e, $type='JsContact', string $name, $value)
+	{
+		try {
+			throw $e;
+		}
+		catch (\JsonException $e) {
+			throw new JsContactParseException("Error parsing JSON: ".$e->getMessage(), 422, $e);
+		}
+		catch (\InvalidArgumentException $e) {
+			throw new JsContactParseException("Error parsing $type attribute '$name': ".
+				str_replace('"', "'", $e->getMessage()), 422);
+		}
+		catch (\TypeError $e) {
+			$message = $e->getMessage();
+			if (preg_match('/must be of the type ([^ ]+( or [^ ]+)*), ([^ ]+) given/', $message, $matches))
+			{
+				$message = "$matches[1] expected, but got $matches[3]: ".
+					str_replace('"', "'", json_encode($value, self::JSON_OPTIONS_ERROR));
+			}
+			throw new JsContactParseException("Error parsing $type attribute '$name': $message", 422, $e);
+		}
+		catch (\Throwable $e) {
+			throw new JsContactParseException("Error parsing $type attribute '$name': ". $e->getMessage(), 422, $e);
+		}
+	}
+
 	/**
 	 * @return Api\Contacts
 	 */
diff --git a/doc/REST-CalDAV-CardDAV/README.md b/doc/REST-CalDAV-CardDAV/README.md
index 695f21ae86..9100633cf1 100644
--- a/doc/REST-CalDAV-CardDAV/README.md
+++ b/doc/REST-CalDAV-CardDAV/README.md
@@ -41,7 +41,8 @@ from the data of a allprop PROPFIND, allow browsing CalDAV/CardDAV tree with a r
 > currently implemented only for contacts!
 
 Following RFCs / drafts used/planned for JSON encoding of ressources
-* [draft-ietf-jmap-jscontact: JSContact: A JSON Representation of Contact Data](https://datatracker.ietf.org/doc/html/draft-ietf-jmap-jscontact-07)
+* [draft-ietf-jmap-jscontact: JSContact: A JSON Representation of Contact Data](https://datatracker.ietf.org/doc/html/draft-ietf-jmap-jscontact-07) ([*](#implemented-changes-to-jscontact-draft-07-from-next-draft))
+* [draft-ietf-jmap-jscontact-vcard-06: JSContact: Converting from and to vCard](https://datatracker.ietf.org/doc/html/draft-ietf-jmap-jscontact-vcard/)
 * [rfc8984: JSCalendar: A JSON Representation of Calendar Data](https://datatracker.ietf.org/doc/html/rfc8984)
 
 ### Supported request methods and examples
@@ -66,9 +67,9 @@ curl https://example.org/egroupware/groupdav.php/<username>/addressbook/ -H "Acc
       "fullName": { "value": "Default Tester" },
       "organizations": {
         "org": {
-          "name": { "value": "default.org" },
+          "name": "default.org",
           "units": {
-            "org_unit": { "value": "department.default.org" }
+            "org_unit": "department.default.org"
           }
         }
       },
@@ -83,7 +84,7 @@ curl https://example.org/egroupware/groupdav.php/<username>/addressbook/ -H "Acc
         "url": { "resource": "https://www.test.com/", "type": "uri", "contexts": { "work": true } }
       },
       "notes": [
-        { "value": "Test test TEST\n\\server\\share\n\\\nother\nblah" }
+        "Test test TEST\n\\server\\share\n\\\nother\nblah"
       ],
     },
     "/<username>/addressbook/list-36": {
@@ -96,7 +97,7 @@ curl https://example.org/egroupware/groupdav.php/<username>/addressbook/ -H "Acc
         "fullName": { "value": "Example distribution list" }
       },
       "members": {
-        "5638-8623c4830472a8ede9f9f8b30d435ea4": true
+        "urn:uuid:5638-8623c4830472a8ede9f9f8b30d435ea4": true
       }
     }
   }
@@ -194,7 +195,7 @@ curl 'https://example.org/egroupware/groupdav.php/addressbook/?sync-token=https:
         { "type": "personal", "value": "Default" },
         { "type": "surname", "value": "Tester" }
       ],
-      "fullName": { "value": "Default Tester" },
+      "fullName": "Default Tester",
 ....
     }
   },
@@ -218,7 +219,7 @@ curl 'https://example.org/egroupware/groupdav.php/addressbook/5593' -H "Accept:
     { "type": "personal", "value": "Default" },
     { "type": "surname", "value": "Tester" }
   ],
-  "fullName": { "value": "Default Tester" },
+  "fullName": "Default Tester",
 ....
 }
 ```
@@ -255,3 +256,7 @@ Location: https://example.org/egroupware/groupdav.php/<username>/addressbook/123
 * **DELETE** requests delete single resources
 
 * one can use ```Accept: application/pretty+json``` to receive pretty-printed JSON eg. for debugging and exploring the API
+
+#### Implemented changes to [JsContact draft 07](https://datatracker.ietf.org/doc/html/draft-ietf-jmap-jscontact-07) from next draft:
+* localizedString type / object is removed in favor or regular String type and a [localizations object like in JsCalendar](https://datatracker.ietf.org/doc/html/rfc8984#section-4.6.1)
+* [Vendor-specific Property Extensions and Values](https://datatracker.ietf.org/doc/html/draft-ietf-jmap-jscontact-07#section-1.3) use ```<domain-name>:<name>``` like in JsCalendar
\ No newline at end of file