[summary][draft][part] Bash script parsing

DISCLAIMER. English language used here only for compatibility (ASCII only), so any suggestions about my bad grammar (and not only it) will be greatly appreciated.

Status: summary.
State: draft,part.
Detailed description: illustration for info bash ch-2.

Bash script parsing units:

                    token = single unit
                   /     \
                 /         \
               /             \
             /                 \
          word                operator
         / | \                /     \
       /   |   \             /       \
     /     |     \          /         \
reserved  name    ..     control     redirection
word                     operator     operator


              metacharacter - separate words (or tokens?)
              /     \   
            /         \ 
          /             \
       blank           some (why not all?)
                       control operators