====== Kin-util C++ interfaces ======

Main routine of //kin-util// program is the parser of the input [[..:dtd|XML-file with the job instructions]]. It looks for the job commands and pass their XML texts to the corresponding subroutines. There are two groups of the commands: import/export commands and instructions for computations.

**Import/Export**. The result is returned as a reference via the second argument of the subroutine: 
  CLIStatus importSchema(const XMLElement&, Schema*& schema_ptr);
  CLIStatus importSchemaInstance(const XMLElement&, SchemaInstance*& instance_ptr);
  CLIStatus importInstanceExptlData(const XMLElement&);
**Computations**:
  CLIStatus doComputation(const XMLElement& calc_elem);
  CLIStatus displayResult(const XMLElement&);
  CLIStatus optimize(const XMLElement& optimize_elem);

**Global containers** are used by the main routine:
  std::vector<Schema*> globalSchemaList;
  std::vector<SchemaInstance*> globalInstanceList;
  std::map<String, CalculationResult*> globalResultMap;
  std::map<String, ExptlDataContainer*> globalExptlMap;
And there are several misc functions to find objects by their means:
  Schema* findSchemaById(const Clip& schema_id);
  SchemaInstance* findInstanceById(const Clip& instance_id);
  CalculationResult* findResultById(const Clip& result_id);
  InstanceExperimentalData* findExptlById(const Clip& exptl_id);

//CLIStatus// is the class which objects depict results of any parsing or calculation subroutine. It declares an Error/Warning ID, textual description of the error and the error's context (e.g. an invalid command syntax).