【正文】
ollows 按照以下格式描述:Identification 標(biāo)識(shí):Type 類型:Purpose目的:Functions 功能列表: Level 2 Design Description (Optional)第二層設(shè)計(jì)描述(可選)Each entity that is defined in L1 and identified for further description shall be described by separate subsections as mentioned 。本節(jié)描述進(jìn)程的接口。描述:總體描述該接口實(shí)現(xiàn)的目的。本節(jié)描述模塊/子系統(tǒng)的接口。In case of external entities, only the interfaces relevant to the software being described need be described.對(duì)于外部實(shí)體只有同被描述軟件相關(guān)的接口才需描述。 Interface Description接口描述This section describes interfaces of the design entities (such as subsystem, module, process)that make up the system。本節(jié)描述數(shù)據(jù)結(jié)構(gòu)間的關(guān)系。Structure charts, transaction diagrams, MSC, ER diagram can be used to represent (交互)事務(wù)圖,消息序列圖, ER圖。描述數(shù)據(jù)時(shí)要注意該數(shù)據(jù)是否真正為本級(jí)模塊分解的公用數(shù)據(jù)。External data entities shall not be 。1. Process 1 Description進(jìn)程1描述Describe as follows 按照以下格式描述:Identification 標(biāo)識(shí):Type 類型:Purpose目的:Functions 功能列表:This part describes the functions to be performed in the process. If the function has been described in module deposition before, description should be made on what functions of the modules are implemented in this process.描述本進(jìn)程中要完成的功能,如功能已經(jīng)在前面的模塊分解中有描述,則重點(diǎn)描述本進(jìn)程完成了哪些模塊的哪些功能。1. Module/Subsystem 1 Description模塊/子系統(tǒng)1描述Describe as follows 按照以下格式描述:Identification 標(biāo)識(shí):Type 類型:Purpose目的:Functions 功能列表:Sub modules: 子模塊:If this module will be further deposed into sub modules, list all sub modules here. 如果本模塊還要繼續(xù)劃分,列出下屬子模塊 Concurrent Process Deposition并發(fā)進(jìn)程處理分解This section describes concurrent processes in the system..本節(jié)描述系統(tǒng)中的并發(fā)進(jìn)程。Structure chart, Hierarchical deposition diagram, natural language can be used to represent the ,層次分解圖,自然語(yǔ)言。 為了本文檔內(nèi)容的完整性,可以采用對(duì)于描述相關(guān)設(shè)計(jì)實(shí)體文檔索引的方式:如對(duì)于操作系統(tǒng)編程手冊(cè)的索引 Design Considerations (Optional)設(shè)計(jì)思路(可選) Design Methodology 設(shè)計(jì)方法Describe design methodology that shall be used in the software system 。All external entities of the software system (defined in Procedure of Design Specification) that interact with the software system, or affect the software system in a certain mode, for example, OS, driver, hardware, interrupt or other software systems.The property (such as message, library invoking) and type (such as OS service, munication service, system tools, etc.) of the interaction between external entities and this system. Only the contents that are helpful in the software design should be included while describing the features of an external entity. Instead of a plete description in this specification, you can make indexes to refer to the relative documents that describe the software design. For example, an index can be made for the programming guidance of the OS.所有系統(tǒng)外圍實(shí)體(在設(shè)計(jì)規(guī)格流程中有定義),這些實(shí)體與軟件系統(tǒng)發(fā)生交互作用或以某種方式影響軟件系統(tǒng),比如,操作系統(tǒng),驅(qū)動(dòng)程序,硬件,中斷,其他軟件系統(tǒng)等.外圍實(shí)體和本系統(tǒng)相互作用的性質(zhì)(比如,消息,庫(kù)調(diào)用)和類型(比如,OS服務(wù),通信服務(wù),系統(tǒng)工具等)。 Functions 軟件功能Explain what the