software architecture

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12 what is a stakeholder.

  

11 what kind is UML?

  UML is a seminotation way.

10 List notation ways for architecture documentation and give their differences.

  there are three notation ways: Informal notations, semiformal Notation and Formal notations.

    informal notations. 

      Views produced using general-purpose diagramming and editing tools.

      the sematics of the description are characterized in natural laguage.

      they cannoot be formally analyzed.

    semiformal notation

      standardized notation that prescribes graphical elements and rules of construction(e.g. UML)

      Lacks a complete semantic treatment of the meaning of those elements

      rudimentary analysis can be appplied.

    formal notations

      views are described in a notation that has a precise semantics (e.g., based on mathematical formalisem)

      formal analysis of both syntax and semantics is possible

      architecture description languages(ADLs)

      support automation through associated tools      

9 How many sections does a view template have?

  A view template will have five sections, which are primary presentation, element catalog, context diagram, variability guide and rationale.

    The primary representation depicts the elements and relations of the view, in the vocabulary of that view.

    The element catalog details at least those elements depicted in the primary presentation.(Primary representation 中各element的介绍)

    A context diagram shows how the system or portion of the system depicted in this view relates to its environment: humans, other systems, pysical objects... (和context之间联系的)

    A variability guide shows how to exercise any variation points that are a part of the architecture shown in this view.(如何exercise(运用吗?)view中的variation points)

    The rationale explains why the design reflected in the view came to be (e.g. justification for the choice of a pattern).

8 Is there an effective way to visualise the software architecture?

  In Simon Brown‘s experience, software teams aren‘t able to effectively visualise the software architecture of their systems.

7 what is architectural views?

  an architectural view is a representation of an architectural structure accordingto a template in a chosen notation, and used by some system stakeholders.

6 what is documenting architecture?

  it is a "views and beyond"  approach. Documenting an architecture is matter of documenting the relevant views and then adding documentation that applies to more than one view.

5 what is architectural degradation and recovery?

  architectural degradation: when a system evolves, ideally its prescriptive architecture is modified first. however, in practice, they system -and thus its decriptive architecture- is often directly modified.

  architectural recovery is the process of determining a software system‘s architecture from its implementation-level artifacts.

4 What is prescriptive architecture and descriptive structure?

  A system‘s prescriptive structure captures the design decisions made prior to the system‘s construction.

  A system‘s descriptive architecture describes how the system has been built.

3 Is there an architecture if there is no description or specification?

  An architecture can exist independently of its description or specification.

    a. every system compreses elements and relations among them to support some type of reasoning.

    b. But the architecture may not be known to anyone.

2 what reasoning an architectural strutrue should spport? The reasoning shoudl be about an attribute important to some stakeholder.

1 what structure is architectural?  A structure is architectural if it supports reasoning about the system‘s properties.

 

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