SDL Characteristics

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فهرست عناوین اصلی در این پاورپوینت

● Summary
● What is SDL
● History
● Application area
● Use of SDL
● Goals
● SDL Characteristics
● Examples
● SDL & others languages
● SDL Structure
● System
● Block
● Process
● Process Example
● Procedure
● Describing behavior with SDL
● Process Addressing
● Explicit Addressing
● Implicit Addressing
● Process Creation/Termination
● Example – La lotteria Algebrica
● Glossary
● References
● The End
● Why use SDL & UML ?
● MSC Features
● MSC Example
● ASN.1
● ASN.1 Features
● ASN.1 example
● TTCN Features
● TTCN Example

نوع زبان: انگلیسی حجم: 0.5 مگا بایت
نوع فایل: اسلاید پاورپوینت تعداد اسلایدها: 68 صفحه
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گروه موضوعی: زمان استخراج مطلب: 2019/05/15 10:48:40

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block, sdl, description, system, process, signal, ., contain, figure, channel, structure, language,

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عبارات پرتکرار و مهم در این اسلاید عبارتند از: block, sdl, description, system, process, signal, ., contain, figure, channel, structure, language,

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specification and description language luigi bozzo may ۲ ۲ couse of software engineering ii aa ۲ ۱ ۲ summary what is sdl intro history goal sdl characteristics sdl structure example – la lotteria algebrica glossary references what is sdl sdl specification and description language is an object oriented formal language developed and standardized by the international telecommunication standardization sector itu t intended for the specification of complex event driven real time and interactive application involving many concurrent activities that communicate using discrete signals what is sdl sdl describe the architecture behaviour and data of distributed systems in realtime environments useful for specifying the normative requirements of telecommunications protocol standards wide spectrum language specification to implementation history ۱۹۶۸ itu study of stored program control systems ۱۹۷۲ start of the development ۱۹۷۶ first pre release ۱۹۸ ۱۹۸۴ graphics process semantics structure data definition more rigorous start of tools user guide ۱۹۸۸ sdl۸۸ the first standard early versions of sdl have been in use for a long time. the experience from this use has contributed to the improvement of the language history ۱۹۹۲ sdl۹۲ msc intro of oo and methodology guidelines ۱۹۹۵ sdl with asn.۱ ۱۹۹۹ sdl ۲ msc ۲ object modelling support improved implementation support ۲ ۱ sdl ۲ ۱ meeting uml application area type of systems type of information level of abstraction real time interactive distributed heterogeneous behavior structure overview to details use of sdl goals provide a better way to describe behaviour support human communication and understanding easy verification conformance of implementation of specifications design optimization analyzing specifications for completeness and correctness a specification is a basis for driving implementations and it should abstract from implementation details in order to give overview of a complex system to postpone implementation decisions and not to exclude valid implementations. goals use of computer based tools to create maintain and analyze specifications formal high quality descriptions produced better quicker and cheaper provide to programmers an easy way to do verification validation of the design regression testing automatic documentation and simplified maintenance sdl characteristics graphical form based on communicating processes oo description of components nonproprietary internationally standardized language formality and clarity high degree of testability portable scalable open reusable examples cellular phones switches gprs umts gsm isdn sdl others languages sdl is well suited to be the core of full scale projects because of its abilities to interface with other languages. this set of notations meets criteria for uml. there has been work relating the sdl and ttcn semantic models and the ttcn is used for testing validating standards and systems written using sdl. sdl structure comprises four main hierarchical levels system block process procedure sdl structure a system contains one or more blocks interconnected with each other and with the boundary of the system by channels the block is the main structuring concept a block can be partitioned into sub blocks and channels a channel is a means of conveying signals sdl structure repeated block partitioning result in a block tree structure partitioned blocks do not contain any process sdl structure leaf blocks of a block tree structure are not partitioned and contain only process system the system description constitutes the top level of detail the system is what the sdl description specifies an abstract machine communicating with its environment environment system channel system a system diagram usually contains the following elements system name signal descriptions channel descriptions data type descriptions block descriptions a system diagram usually contains the following elements system name in figure daemongame signal descriptions for the types of signals interchanged between the blocks of the system or between the blocks and the environment in figure newgame probe etc channel descriptions for the channels connecting the blocks of the system to one another and to the environment of the system in figure daemonserver etc. data type descriptions for the user defined data types visible in the whole system and its environment in figure there are no user defined data types block descriptions for the blocks into which the system is partitioned in figure the system contains only one block blockgame . ۱ ۲ ۳ ۵ block a block is a part of the system that can be treated as a self contained object block a block diagram usually contains the following elements block name signal descriptions signal route descriptions channel to route connections process descriptions a block diagram usually contains the following elements block name in figure blockgame signal descriptions for the signals local to the block i.e. not visible outside the block in figure gameover gameoverack signal route descriptions for the signal routes connecting the processes of the block to one another and to the environment of the block in figure r۱ r۲ etc. channel to route connections the specification of the connections between the channels external to the block and the signal routes internal to the block in figure l daemonserver to r۴ etc. process descriptions for the process types that describe the behaviour of the block in figure monitor game . ۱ ۲ ۵ ۴ ۳ process a process in sdl is an extended finite state machine the behaviour of a finite state machine is described by states and transitions a process description is given through a process diagram in sdl there are five basic constructs for the description of a process task process a process diagram usually contains the following elements process name formal parameters variable descriptions process graph procedure descriptions timer descriptions process example process p dcl c character procedure proc c proc fpar v۱ integer proc ۱ ۲ ۳ ۴ ۵ c procedure the procedure construct in sdl is similar to the one known from programming languages a procedure is a finite state machine within a process. it is created when …

کلمات کلیدی پرکاربرد در این اسلاید پاورپوینت: block, sdl, description, system, process, signal, ., contain, figure, channel, structure, language,

این فایل پاورپوینت شامل 68 اسلاید و به زبان انگلیسی و حجم آن 0.5 مگا بایت است. نوع قالب فایل ppt بوده که با این لینک قابل دانلود است. این مطلب برگرفته از سایت زیر است و مسئولیت انتشار آن با منبع اصلی می باشد که در تاریخ 2019/05/15 10:48:40 استخراج شده است.

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