Keyword it is a value of property of a data element (or record) to identify the data element(or record). If keyword can be identified only as a record, said that the " primary keyword. If keyword can identify a number of records, said that the" general keywordKeyword it is a value of property of a data element (or record) to identify the data element( or record). If keyword can be identified only as a record, said that the “primary keyword." If keyword can identify a number of records, said that the “general keyword