preserving cross references in docbook xml files

Folks, I was a member of this list several years ago. It's great to be back among you. I inherited a large XML document (700 pages) that was written under the docbook DTD. The editing tool originally used to create the file is unknown. I'd like to be able to edit it in Frame and save it

preserving cross references in docbook xml files

Folks, I was a member of this list several years ago. It's great to be back among you. I inherited a large XML document (700 pages) that was written under the docbook DTD. The editing tool originally used to create the file is unknown. I'd like to be able to edit it in Frame and save it back