1[article Doc Title 1a 2[quickbook 1.5] 3[id doc-title] 4] 5 6[/ A repeat of doc-title1, but with an explicit id. ] 7 8[heading a1] 9 10[include doc-title1-inc1.quickbook] 11 12[heading a2] 13 14[include doc-title1-inc2.quickbook] 15 16[heading a3] 17 18[include doc-title1-inc3.quickbook] 19 20[heading a4] 21