P6 xml including all fields

Hello, 

I have created an application that takes P6 schedules as an input using an xml parser, only to realise that the xml export from P6 does not contain all of the fields that are available in the xer export. 

Is there a way to export all fields in xml, or are there any tools available to convert an xer to an xml? I've heard of Legare, Xena and an xer file parser but I'm not sure whether these do what i'm looking for. 

Thanks in advance for any help. 

James