transactions reference. It will be made clearin later chapters that every FTR must have at least one or more transactions. BoundariesDefinition:Review the purpose of thefunction point count. Look at how andwhich applications maintain data. Identifythe business areas that support the applications. Definition: Record Element Type (RET): File Type Referenced (FTR): Data Element Type (DET): Examples of elements identifiedas data elements. Those elements are considered when we talk about GUIs.: RadioButtonsRadio Buttons are treated as dataelement types. Within a group of, a frame, radio buttons the user has theoption of selecting only one radio button; so only one data element type iscounted for all the radio buttons contained in the frame.CheckBoxesCheck Boxes differ from radiobuttons in that more than one check box can be selected at a time.Each checkbox, within a frame, that can be selected should be treated as a data element. CommandButtonsCommand buttons may specify anadd, change, delete or inquire action.A button, like OK, may invoke severaldifferent types of transactions.According to IFPUG counting rules each commandbutton would be counted as a data element ___________________________________ EXTERNAL INPUTS (EI) It is an elementary process inwhich data crosses the boundary from outsideto inside. This data is comingexternal to the application. The data may come from a data input screen oranother application. The data may be used to maintain one or more internallogical files. The data can be either control information or business information.If the data is control information it does not have to maintain an internallogical file. File Types Referenced(FTRs): Unique FTRs helps distinguishexternal input from other external input. An FTR must be either an InternalLogical File and/or External Interface File. Each internal logical file that anexternal input maintains is counted as an FTR. Any internal logical file orexternal interface file that is referenced by an external input as part of theelementary process of maintaining an interna logical file would be consideredan FTR also. Rating: Like all components, EIs arerated and scored. The rating is based upon the number of dataelement types (DETs) and thefile types referenced (FTRs). DETs and FTRs are discussed earlier. The tablebelow lists both the level (low, average or high) and appropriate score (3, 4or 6)._______________________________________________________________________EXTERNAL OUTPUTS (EO) an elementary process inwhich deriveddata passes across the boundary frominside to outside. Additionally,an EO may update anILF. The data creates reports or output files sent to otherapplications. These reports and files are created from information contained in oneor more internal logical files and external interface files. Rating:Like all components,EOs are rated and scored. The rating is based upon the number of data elements(DETs) and the file types referenced (FTRs). The rating is based upon the total numberof unique (combined unique input and out sides) data elements (DETs) andthe file types referenced (FTRs) (combined unique input and output sides).DETs and FTRs were discussed earlier in this section. The table below listsboth the level (low, average or high) and appropriate score (4, 5 or 7). _________________________________________________________________________ EXTERNAL INQUIRY (EQ) It is an elementary process with bothinput and output components that result in dataretrieval from one or moreinternal logical files and external interface files. The