Understand what XML with schema is, and understand the schema workflow in Adobe FrameMaker.
Adobe FrameMaker allows you to import XML markup documents that are associated with W3C's XML Schema language. FrameMaker automatically creates a DTD and EDD from the schema. FrameMaker validates the document structure against the associated schema upon both import and export to XML, but does not retain all schema information upon export.
For complete details of how an XML schema is mapped to a DTD, see the Structure Application Developer Reference.