12345678910111213141516171819 .X set epub-uuid very-unique-identifier.X set document-title Title.Pt Part1.Ch Chap1Text..Ch Chap2Text..Sh Section1Text..Sh Section2Text..Ss Subsection1Text..Pt Part2.Ch Chap3Text..Sx Section2.Sx Chap1.Sx Part2
.X set epub-uuid very-unique-identifier
.X set document-title Title
.Pt Part1
.Ch Chap1
Text.
.Ch Chap2
.Sh Section1
.Sh Section2
.Ss Subsection1
.Pt Part2
.Ch Chap3
.Sx Section2
.Sx Chap1
.Sx Part2