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diff --git a/usth/ICT2.7/P2L2 OO Software Engineering and UML Subtitles/7 - OO Analysis History - lang_en_vs4.srt b/usth/ICT2.7/P2L2 OO Software Engineering and UML Subtitles/7 - OO Analysis History - lang_en_vs4.srt deleted file mode 100644 index 843126e..0000000 --- a/usth/ICT2.7/P2L2 OO Software Engineering and UML Subtitles/7 - OO Analysis History - lang_en_vs4.srt +++ /dev/null @@ -1,175 +0,0 @@ -1 -00:00:00,060 --> 00:00:02,160 -The use of object orientation and object oriented - -2 -00:00:02,160 --> 00:00:06,430 -concepts led to what we call OOAD, object oriented - -3 -00:00:06,430 --> 00:00:10,650 -analysis and design. OOAD is a software engineering approach - -4 -00:00:10,650 --> 00:00:13,790 -whose main characteristics is to model a software system - -5 -00:00:13,790 --> 00:00:16,600 -as a group of interacting objects, and we'll - -6 -00:00:16,600 --> 00:00:19,160 -see what that means. In particular, in this lesson - -7 -00:00:19,160 --> 00:00:21,590 -we will specifically focus on the first part of - -8 -00:00:21,590 --> 00:00:25,360 -this, object oriented analysis, which is a requirements analysis - -9 -00:00:25,360 --> 00:00:29,650 -technique that concentrates on modeling real world objects. And - -10 -00:00:29,650 --> 00:00:31,340 -as I usually like to do, I would like - -11 -00:00:31,340 --> 00:00:34,812 -to start by providing some historical perspective on object - -12 -00:00:34,812 --> 00:00:37,472 -oriented analysis to better understand how we went from a - -13 -00:00:37,472 --> 00:00:40,990 -function-centric world to a data-centric world. And several people - -14 -00:00:40,990 --> 00:00:43,800 -contributed to this shift in perspective, but I'd like - -15 -00:00:43,800 --> 00:00:46,960 -to mention a few that were particularly influential. Starting - -16 -00:00:46,960 --> 00:00:50,540 -from James Rumbaugh, which in the 90s developed an integrated - -17 -00:00:50,540 --> 00:00:53,900 -approach to object oriented modelling with three main aspects. - -18 -00:00:53,900 --> 00:00:56,680 -A data aspect, so the modelling was based on - -19 -00:00:56,680 --> 00:01:00,390 -using an extended version of entity relationship diagrams to - -20 -00:01:00,390 --> 00:01:03,680 -describe classes and inheritance. So that's what was called - -21 -00:01:03,680 --> 00:01:06,770 -the object model. And the second aspect has to - -22 -00:01:06,770 --> 00:01:09,770 -do with functions. So data flow diagrams were used - -23 -00:01:09,770 --> 00:01:12,850 -to represent the functional aspects of the system, where - -24 -00:01:12,850 --> 00:01:16,070 -each function was then becoming a method in a class. - -25 -00:01:16,070 --> 00:01:18,500 -So this is what is called the functional model. - -26 -00:01:18,500 --> 00:01:22,120 -So object model and functional model. The third model - -27 -00:01:22,120 --> 00:01:25,120 -in Rumbaugh's methodology had to do with control. So - -28 -00:01:25,120 --> 00:01:29,301 -it was representing the dynamic aspects of a system. And - -29 -00:01:29,301 --> 00:01:31,880 -it uses state machines, which we'll cover in more - -30 -00:01:31,880 --> 00:01:35,730 -detail, to represent how a system would evolve going from - -31 -00:01:35,730 --> 00:01:37,650 -one state to the other based on what happened - -32 -00:01:37,650 --> 00:01:41,260 -to the system. These three models together represented what was - -33 -00:01:41,260 --> 00:01:44,950 -called the Object Modeling Technique, or OMT. And - -34 -00:01:44,950 --> 00:01:47,860 -OMT combined with contributions from several people, and in - -35 -00:01:47,860 --> 00:01:51,290 -particular Jacobson and Booch, evolved into what we call - -36 -00:01:51,290 --> 00:01:54,910 -the Unified Modeling Language, which is UML, which is - -37 -00:01:54,910 --> 00:01:56,910 -probably the modeling language that most of you - -38 -00:01:56,910 --> 00:02:00,480 -are familiar with. UML extends OMT by providing more - -39 -00:02:00,480 --> 00:02:03,460 -diagrams and a broader view of a system from - -40 -00:02:03,460 --> 00:02:06,270 -multiple perspectives. So, in the second part of the - -41 -00:02:06,270 --> 00:02:07,850 -lesson, we will cover some of these - -42 -00:02:07,850 --> 00:02:10,530 -diagrams in details, but before that, I'd like - -43 -00:02:10,530 --> 00:02:12,215 -to talk a little bit more about object - -44 -00:02:12,215 --> 00:02:14,540 -oriented analysis, and how we can perform it. |