The volume.htg source file can contain the following entity declarations and entity references so that the actual text can be put into the named files:
<!entity topic1 FILE "topic1"> <!entity topic2 FILE "topic2"> <!entity topic3 FILE "topic3"> &topic1; &topic2; &topic3;
The following entity declaration causes the words "Architectural Analysis of Aircraft Precision Components" to be displayed wherever the &apc; entity reference appears in the marked-up files.
<!entity apc "Architectural Analysis of Aircraft Precision Components">
The following entity declaration for a figure is placed at the beginning of the source file:
<!entity CloseUpFig FILE "figname.tif">
and the figure would be inserted where the following markup appears:
<figure entity=CloseUpFig> Close Up View <\figure>