org: Language-specific header arguments in Org mode properties

 
 Language-specific header arguments in Org mode properties
 .........................................................
 
 Language-specific header arguments are also read from properties
 ‘header-args:<lang>’ where ‘<lang>’ is the name of the language
 targeted.  As an example
 
      * Heading
        :PROPERTIES:
        :header-args:clojure:    :session *clojure-1*
        :header-args:R:          :session *R*
        :END:
      ** Subheading
        :PROPERTIES:
        :header-args:clojure:    :session *clojure-2*
        :END:
 
    would independently set a default session header argument for R and
 clojure for calls and source blocks under subtree “Heading” and change
 to a different clojure setting for evaluations under subtree
 “Subheading”, while the R session is inherited from “Heading” and
 therefore unchanged.