After you’ve used InDesign to create and export
an XML file, you can make changes to the XML using either of these
methods:
To make changes directly in the XML
file, open it in a text or XML editor.
To make changes that will be preserved in the source
document, open the InDesign file that the XML was exported from.
After you make changes to the content in InDesign, you can export
it to XML again, using the original XML filename if you want to
replace the file.