1. marked sets or target domains
   1. target domains
      1. = known domain + unknown domain
   2. the examples in marked sets:
      1. 0 marked： 0,00,000,0000,........
      2. 01 marked： ε,01,001,0001,........
      3. ... marked： .....................................
      4. 10 marked： ε,10,100,1000,........
      5. 1 marked： 1,11,111,1111,........
2. single set or complete sub-domain
   1. examples of elements in single set or in complete sub-domain: e.g.1. 0,1 e.g.2. Excited, Inhibition e.g.3. on,off
3. hierarchical sets or super-sub-domains
   1. examples of elements and combination of elements in hierarchical sets or in super-sub-domains：e.g.1. 0,1 00,01,10,11 000,001,010,011,110,101,100,111 ............................................................................................ ......................................................................................................................