Language
 \. p{ Non-formal_language
       (Formal_language
         \. p{ Non-purely_declarative_language
               (Purely_declarative_language = Purely_descriptive_language,
                 \. ne{ (Purely_descriptive_assertion_language
                          \. p{ (Knowledge_representation_language = Semantic_representation_language,
                                  \. FL  FE  JSON-LD )
                                (Data_structuration_language = Data-structure_representation_language,
                                  \. (HTML
                                       \. e{ (HTML5 = HTML5_model/HTML5_notation)
                                             (XHTML = XHTML_model/XML) //subtype+restriction of XML + HTML
                                           } )
                                     (XML \. XHTML )
                                     JSON
                              } )
                        Purely-descriptive_query-language
                        Transformation_specification_language  //e.g. XSLT
                        Presentation_specification_language  //e.g. CSS
                      } )  //no exclusion: e.g., an hyperlink is a query and a structural-relation assertion
                       
             } )
     }.
Légende, explications et intérêts :
  Language
   has for `subtype partition´ the list composed of
     ` Non-formal_language along with
       `Formal_language
         which has for `subtype partition´ the list composed of
           ` Non-purely_declarative_language along with
             `Purely_declarative_language
               which is the same as Purely_descriptive_language
               and has for `incomplete non-exclusive subtype set´ the list composed of
                 ` `Purely_descriptive_assertion_language
                     which has for `subtype partition´ the list composed of
                       ` `Knowledge_representation_language
                           which is the same as Semantic_representation_language 
                           and has for subtype FL as well as FE as well as JSON-LD´ along with
                         `Data_representation_language
                           which is the same as Data-structure_representation_language
                           and has for subtype
                             `HTML
                               which has for `incomplete non-exclusive subtype set´ the list composed of
                                 ` `HTML5 which is the same as HTML5_model/HTML5_notation´ along with
                                   `XHTML which is the same as XHTML_model/XML´
                                 ´ as well as
                             `XML which has for subtype XHTML´ as well as 
                             JSON ´
                       ´ along with
                   Purely-descriptive_query-language along with
                   Transformation_specification_language  (e.g. XSLT) along with
                   Presentation_specification_language  (e.g. CSS)
                 ´ (no exclusion: e.g., an hyperlink is a query and a structural-relation assertion)
             ´          
           ´          
     ´
  Language
   has for `subtype partition´ the list composed of 
     Non-formal_language along with
     Formal_language.
     Formal_languague
      has for `subtype partition´ the list composed of
        Non-purely_declarative_language along with
        Purely_declarative_language.
        Purely_declarative_language
         is the same as Purely_descriptive_language
         and has for `incomplete non-exclusive subtype set´ the list composed of
           Purely_descriptive_assertion_language along with
           Purely-descriptive_query-language along with
           Transformation_specification_language (e.g. XSLT) along with
           Presentation_specification_language (e.g. CSS)
           (no exclusion: e.g., an hyperlink is a query and a structural-relation assertion).
           Purely_descriptive_assertion_language
            has for `subtype partition´ the list composed of
              Knowledge_representation_language along with
              Data_representation_language.
              Knowledge_representation_language
               is the same as Semantic_representation_language 
               and has for subtype JSON-LD along with FE along with FL.
              Data_representation_language
               is the same as Data-structure_representation_language
               and has for subtype HTML as well as
                 XML as well as
                 JSON.
                 HTML
                  has for `incomplete non-exclusive subtype set´ the list composed of
                    HTML5 along with
                    XHTML along with JSON.
                    HTML5 is the same as HTML5_model/HTML5_notation.
                    XHTML is the same as XHTML_model/XML.
                 XML has for subtype XHTML.
   
                      Language
                        △  {complete, disjoint}
                _________|________
               |                 |
     Non-formal_language      Formal_language
                                △  {complete, disjoint}
             ____________________|____________
            |                                |
  Non-purely_declarative_language      Purely_declarative_language = Purely_descriptive_language
                                            △
             ________________________________|__________________________________________________
            |                                     |                               |            |
Purely_descriptive_assertion_language             |                               |            |
           △  {complete, disjoint}            Purely-descriptive_query-language     |            | 
      ______|_____________________________            Transformation_specification_language     |
     |                                   |                    Presentation_specification_language
Knowledge_representation_language      Data_structuration_language 
 = Semantic_representation_language     = Data-structure_representation_language
        △                         △
       ____|______                     ___|________
     |    |      |                   |     |      |
    FL   FE  JSON-LD                HTML   XML   JSON
                                   △    △
                                   ___|___   | 
                                |       |   |
                               HTML5    XHML