Since used of aliases url for front office, {site-configuration:
{request-param:site}:url} returns all the site urls separated by coma (ex: http://www.domaine1.com,http://www.domain2.com)
So, it can not be used anymore in sitemap.xmap as following :
<map:transform src="{template}"> <map:parameter name="siteName" value="{request-param:site}"/> <map:parameter name="contextPath" value="{site-configuration:{request-param:site}:url}"/> </map:transform>