Patent US 7,302,641

An operator is allowed to provide desired data definitions, file definitions and application definitions by entering familiar characters symbols and/or graphicals in a document. Having created a data item descriptor chain, a system recognizes a group of data item names in the respective item descriptors constructing the chain. When it has been found that a recognized data item, say, “data item name”, “type”, “master name” or “synonym” has been registered as pertaining to a descriptor group of “define data”, the system operates to create a data definition descriptor, thus creating data definition descriptors which specify data names and their attributes according to descriptors entered in a data definition sheet.