The Microsoft Office Smart Tag List (MOSTL) and Office namespaces has been changed and updated to move away from using the "urn" declarations. However, so as not to break backwards compatibility, the old namespaces are also supported.

MOSTL Namespace

The MOSTL namespace "urn:schemas-microsoft-com:smarttags:list" used in Office XP has now in Office 2003 became "http://schemas.microsoft.com/office/smarttags/2003/mostl".

The office namespace which is "urn:schemas-microsoft-com:office:office" in Office XP has now in Office 2003 became "http://schemas.microsoft.com/office/smarttags/2003"

The MOSTL update namespace is unchanged and remains "urn:schemas-microsoft-com:smarttags:listupdate"

Guidelines on Usage

Since the old namespace is supported in Office 2003 for backwards compatibility, it is recommended that you use the new namespaces when creating smart tags using MOSTL. It is recommended that you use the new MOSTL namespace is "http://schemas.microsoft.com/office/smarttags/2003/mostl"and new office namespace which is "http://schemas.microsoft.com/office/smarttags/2003" if you don't need backwards compatibility.