> document 1
       > text 2
         [pcdata[
	]] 2
           > sentence 3
             [pcdata[
	]] 3
               > phrase 4
                 [pcdata[This]] 4
               < phrase 4
             [pcdata[
	]] 3
               > phrase 4
                 [pcdata[is]] 4
               < phrase 4
             [pcdata[
	]] 3
               > phrase 4
                 [pcdata[an example ]] 4
                   > phrase 5
                     [pcdata[of ]] 5
                       > phrase 6
                         [pcdata[an XML file]] 6
                       < phrase 6
                   < phrase 5
               < phrase 4
             [pcdata[
	]] 3
           : punct 3
             [pcdata[
	]] 3
           < sentence 3
         [pcdata[
]] 2
       < text 2
   > <document 1