I need to be able to lock worksheets against being edited (well, and allow
sections to be editable). This would be a trivial task, but I need to be
able to do it by manipulating the XML representation of an Excel document
(working against Excel 2003, for the record).

I can't simply use Excel to do this, save it to XML, and then see what's
changed, because Excel strips out protection information when you do that.

I've spent a great deal of time looking at the schemas, fiddling with a
SpreadsheetML file and seeing what elements and attributes pop up when... but
no luck.

I've figured out how to Protect the Workbook and how to Protect a Worksheet,
and I can find attributes that allow/disallow pretty much anything you'd like
to be able to restrict on cells... except for content editing.

I simply cannot find where I:

1) Tell Excel to prevent the editing of cells.

2) Tell Excel to allow the editing of specific cells while the rest of the
sheet is locked.

Does anyone know how to do this? I'm at loss.

Thanks!

Richard