Hi,
all field types's definitition are into folder /administrator/components/com_jsn/helpers/fields/, you can take a simple field type like "text" and create a new type.

About layout or Joomla field types you can refer to Joomla documentation.

I know that I am giving you a somewhat generic answer, but in fact the easy profile's fields use an XML declaration used by Joomla Forms and the Joomla field types (some native and others created by us which mostly extend native fields)

Please help me write the fields. I cloned the scripts and started writing link generation. But I can’t figure out how to get the settings from the xml?

			<field

				name="account_path"

				label="COM_JSN_ACCOUNT_PATH"

				description ="COM_JSN_ACCOUNT_PATH_DESC"

				type="text"

			/>



			<field

				name="account_window"

				label="COM_JSN_ACCOUNT_WINDOW"

				description ="COM_JSN_ACCOUNT_WINDOW_DESC"

				class="btn-group"

				type="radio"

				default="_blank"

			>

				<option value="_self">JNO</option>

				<option value="_blank">JYES</option>

			</field>

		public static function account($field)

	{	

		//require_once(JPATH_SITE.'/components/com_jsn/helpers/helper.php');

		$value=$field->__get('value');

		//$accountPath=JsnHelper::getFieldOptions($alias);

		$path=$field->element[0];



		if (empty($value))

		{

			return JHtml::_('users.value', $value);

		}

		else

		{

			JPluginHelper::importPlugin('content');

			return JHtml::_('content.prepare', '<a href="'.$path.'/'.$value.'" target="'.$target.'">'.$value.' '.$path.'</a>', '', 'jsn_content.content');

		}

	}

Hi,
you can use a code like this:

public static function account($field)

	{	

                if (empty($value))

		{

			return JHtml::_('users.value', $value);

		}

		else

		{

			if(method_exists($field,'getAttribute')){ /* This is necessary because in some point Joomla can call this static function but not pass $field as instance of JField */

                            $accountPath = $field->getAttribute('attribute_name_used_in_function_getXml');

                            // HERE THE CODE

                        } 

			else return $value;

		}

	}