Unless the Air Force has changed the 38784 DTD since the hid it behind a
firewall, what I see for the attribute 'pgwide' is it is used only on the
elements <figtable> (not used in the Army) and <table>. In the Army DTD,
this attribute has been removed.
If you have a new attribute added to your DTD this is the format you'll
pgwide (0 | 1) #IMPLIED
This is the attribute name, a choice of '0' or '1' where the zero is not
page wide and the '1' is page wide.
You will also need to add functionality to the stylesheet to read the
attribute and make the appropriate formatting change(s) to the output.