PIVOT-TYPE MACHINE TRANSLATING SYSTEM COMPRISING A PRAGMATIC TABLE FOR CHECKING SEMANTIC STRUCTURES, A PIVOT REPRESENTATION, AND A RESULT OF TRANSLATION

In a machine translating system wherein word units of a source language are translated to word units of a target language through pivot words of a pivot language, a pragmatic table keeps the pivot words as dominant and dependant pairs together with a relation symbol specifying a semantic relationship between the pivot words of each pair in the pivot language and with surface data representative of the relationship in surface structures of the source and target languages. On analyzing an input word unit string into a source semantic structure, the pragmatic table is referenced to link the pivot words into pairs by relation symbols incompliance with the dominant and dependant pairs and the source surface data therefor. The semantic structure is therefore allowed by the pragmatic table. On mapping the semantic structure to a pivot representation and the representation to a target semantic structure in consideration of wording of the target language, the pragmatic table is similarly referred to. The representation and the target semantic structure are thereby checked against the dominant and dependant pairs and the relation symbols therefor. On generating an output word unit string from the target semantic structure, the pragmatic table is likewise referenced to check whether or not the output string is allowed by the dominant and dependant pairs and the target surface data therefor.