14. A document processing device, comprising: means configured to acquire a template comprising a set of semantic items, wherein (i) candidate values of the set of semantic items and relations among a plurality of semantic items in the set of semantic items are associated with one or more semantic codes, and (ii) the template is associated with a natural language expression mode; semantic item input means configured to receive an input value for at least one semantic item in the set of semantic items, wherein the input value comprises one or more constituent values; machine-processable document generating means configured to generate a first document comprising (i) a first set of semantic codes corresponding to the input value, (ii) the relations among the plurality of semantic items, and (iii) a second set of semantic codes corresponding to the relations among the plurality of semantic items; and natural language document generating means configured to generate, based on the input value and based on the natural language expression mode, a second document comprising the input value.
14. A document processing device, comprising: means configured to acquire a template comprising a set of semantic items, wherein (i) candidate values of the set of semantic items and relations among a plurality of semantic items in the set of semantic items are associated with one or more semantic codes, and (ii) the template is associated with a natural language expression mode; semantic item input means configured to receive an input value for at least one semantic item in the set of semantic items, wherein the input value comprises one or more constituent values; machine-processable document generating means configured to generate a first document comprising (i) a first set of semantic codes corresponding to the input value, (ii) the relations among the plurality of semantic items, and (iii) a second set of semantic codes corresponding to the relations among the plurality of semantic items; and natural language document generating means configured to generate, based on the input value and based on the natural language expression mode, a second document comprising the input value. 18. The device of claim 14 , further comprising means for generating the template from a natural language document sample, said means comprising: means configured to display the natural language document sample via a display device; means configured to select an interested sentence element in the natural language document sample as a core concept and as a semantic item in the set of semantic items of the template; means configured to determine a relation between a current concept of one or more semantic items in the set of semantic items, and the core concept; means configured to search in a concept library for a qualifier concept, wherein a relation between the qualifier concept and the core concept identical to the relation between the current concept and the core concept; and means configured to generate, based on the qualifier concept, candidate values of the one or more semantic items in the set of semantic items.