Replace Element by Element

Hello,

When opening XML in FM, sometimes, FM can't apply correctly the EDD to my document.

Example on a book of 1.500 pages there can be around 20 superscript text that are display as normal normal text.

The only way i found is to forced FM to apply the EDD correctly by forcing him with Searching&replacing the <sup> element.

Or faster, replace the HighestLevelElement on each chapter (element call <CHAPTER>)

Would like to do it with a script (so i can add it to my open book script ... there are around 10 script at the opening of a book

I can select all the doc, get the HighestLevelElement name, can delete it or warp an element around it but can't replace the element by it self?

var vCurrentDoc= app.ActiveDoc;
var vFlow = vCurrentDoc.MainFlowInDoc;
var vPgf = vFlow.LastTextFrameInFlow;
var vFirstPgf = vFlow.FirstTextFrameInFlow;
var textRange = new TextRange();        textRange.beg.obj = vFirstPgf;        textRange.beg.offset = 0;        textRange.end.obj = vPgf;        textRange.end.offset = Constants.FTI_PgfEnd;        vCurrentDoc.TextSelection = textRange;
var vElement = vFlow.HighestLevelElement;
var vElemDef = vElement.ElementDef;

var vReplaceElem = vCurrentDoc.GetNamedElementDef(vElemDef.Name);
// vReplaceElem.Delete() or WarpElement();

So how to eaplce an existing element by itself?