Fourth-generation Languages: Principles"This book seeks to set the field of fourth--generation languages into perspective, discussing the mechanism, uses and future evolution of the new tools."--Preface |
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Page 12
... interaction . With one - dimensional inter- action , the computer and user exchange character streams . The user keys commands and operands into the computer . The computer may give the user lists of options from which he can select ...
... interaction . With one - dimensional inter- action , the computer and user exchange character streams . The user keys commands and operands into the computer . The computer may give the user lists of options from which he can select ...
Page 46
... interaction is faster and more powerful than line - oriented interaction and can speed up the building of certain types of pro- grams . A great variety of forms of screen interaction are used . Some of them appear in various places in ...
... interaction is faster and more powerful than line - oriented interaction and can speed up the building of certain types of pro- grams . A great variety of forms of screen interaction are used . Some of them appear in various places in ...
Page 242
... interaction are appropriate for these different types . The screen interaction of a good report generator , for example , is quite different from that for expressing nested loops . A mistake in some of the early 4GLS is that they tried ...
... interaction are appropriate for these different types . The screen interaction of a good report generator , for example , is quite different from that for expressing nested loops . A mistake in some of the early 4GLS is that they tried ...
Contents
What Are FourthGeneration Languages? | 1 |
Procedural Versus Nonprocedural Languages 7 User Friendliness | 9 |
Avoidance of Gobbledygook 14 Simple Tools for Simple Tasks | 16 |
Copyright | |
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Common terms and phrases
action diagram Application Development automatically bracket BUBONIC PLAGUE building CALL PROJE2 checks COBOL column compiler complex COMPUTATIONAL VALUE computer-aided design create CUR1 cursor data base data dictionary data model data-base DATATRIEVE decisecond decision-support default options development life cycle dialogue display DP professionals employ EMPLOYEE end users ENDIF enter errors example executed expert systems facilities field Figure files forecast format fourth-generation languages functions graphics guage HOSPNAME human factoring ILENGTH information center input INTELLECT interaction lines of code logic LOOP machine mainframe manipulate menu mnemonics nonprocedural on-line operations ORDER.DISCOUNT PERFORM PRIN1 PERFORM TAB personal computers PICTURE S9(8 PL/I possible problems procedural productivity programming language prototype query language RAMIS requirements SALES screen SELECT spreadsheet spreadsheet tools STRBUFF MOVE structures SUPPLIER syntax systems analysts techniques terminal testing third-generation languages tion types UPDATE user computing user-friendly V-15 BLANKA VALUE SPACE variables WARDNO