foss-30oct-2012

FOSS (Free Open Source Software) for Web-designing

by

Dr.S.Sridhar, Ph.D.(JNUD), RACI(Paris, NICE), RMR(USA), RZFM(Germany)

RIEEEProc.,RIETCom.,LMISTE,LMCSI

What is What is Software?Software?

Software is a set of items or objects that form a “configuration” that includes • programs • documents • data ...

What is What is Software?Software?

software is engineeredsoftware is engineered software doesn’t wear outsoftware doesn’t wear out software is complexsoftware is complex software is a software is a

‘differentiator’‘differentiator’ software is like an ‘aging software is like an ‘aging

factory’factory’

Software Software ApplicationsApplications system softwaresystem software

real-time softwarereal-time software business softwarebusiness software engineering/scientific engineering/scientific

softwaresoftware embedded softwareembedded software PC softwarePC software AI softwareAI software WebApps (Web applications)WebApps (Web applications)

Software Engineering

A Layered A Layered TechnologyTechnology

Software Engineering

a “quality” focusa “quality” focus

process modelprocess model

methodsmethods

toolstools

Umbrella Umbrella ActivitiesActivities

Software project managementSoftware project management Formal technical reviewsFormal technical reviews Software quality assuranceSoftware quality assurance Software configuration Software configuration

managementmanagement Document preparation and Document preparation and

productionproduction Reusability managementReusability management MeasurementMeasurement Risk managementRisk management

Process as Problem Process as Problem SolvingSolving

statusquo

problemdefinition

technicaldevelopment

solutionintegration

The Primary The Primary Goal:Goal:

High QualityHigh QualityRemember:Remember:

High quality = project timelinessHigh quality = project timeliness

Why?Why?

Less rework!Less rework!

The Linear The Linear ModelModel

analysis design code test

System/informationengineering

Analysis to Analysis to DesignDesign

Entity-Relationship

Diagram

Data FlowDiagram

State-TransitionDiagram

Data Dictionary

Process Specification (PSPEC)

Control Specification (CSPEC)

Data Object Description

THE ANALYSIS MODEL

proceduraldesign

interfacedesign

architecturaldesign

datadesign

THE DESIGN MODEL

Where Do We Where Do We Begin?Begin?

Spec

PrototypePrototype

DesignDesign

modeling

Sizing Modules: Two Sizing Modules: Two ViewsViews

MODULE

What's inside??

How big is it??

Interface DesignInterface Design

Easy to use?Easy to use?

Easy to understand?Easy to understand?

Easy to learn?Easy to learn?

Interface DesignInterface Design

lack of consistencylack of consistencytoo much memorizationtoo much memorizationno guidance / helpno guidance / helpno context sensitivityno context sensitivitypoor responsepoor responseArcane/unfriendlyArcane/unfriendly

Typical Design ErrorsTypical Design Errors

Golden Golden RulesRules

Place the user in controlPlace the user in control Reduce the user’s memory Reduce the user’s memory

loadload Make the interface consistentMake the interface consistent

What Testing ShowsWhat Testing Shows

errorserrors

requirements conformancerequirements conformance

performanceperformance

an indicationan indicationof qualityof quality

Who Tests the Who Tests the Software?Software?

developerdeveloper independent testerindependent tester

Understands the system Understands the system

but, will test "gently"but, will test "gently"

and, is driven by "delivery"and, is driven by "delivery"

Must learn about the system,Must learn about the system,but, will attempt to break itbut, will attempt to break itand, is driven by qualityand, is driven by quality

Testing StrategyTesting Strategy

unit testunit test integrationintegrationtesttest

validationvalidationtesttest

systemsystemtesttest

Debugging: Debugging: A Diagnostic A Diagnostic

ProcessProcess

Design for Design for WebEWebE

Architectural designArchitectural design — laying out the — laying out the page structure of the WebApppage structure of the WebApp

Navigation designNavigation design — defining the — defining the manner in which pages will be manner in which pages will be navigatednavigated

Interface designInterface design — establishing — establishing consistent and effective user interaction consistent and effective user interaction mechanismsmechanisms

FOSFOSSSOpen source doesn't just Open source doesn't just

mean access to the source mean access to the source code. code.

The distribution terms of The distribution terms of open-source software must open-source software must comply with CERTAIN criteria: comply with CERTAIN criteria:

FOSFOSSS1. Free Redistribution1. Free Redistribution

The license shall not restrict any party The license shall not restrict any party from selling or giving away the software from selling or giving away the software as a component of an aggregate as a component of an aggregate software distribution containing software distribution containing programs from several different programs from several different sources. sources.

The license shall not require a royalty or The license shall not require a royalty or other fee for such sale. other fee for such sale.

FOSFOSSS2. Source Code2. Source Code

The program must include source code, The program must include source code, and must allow distribution in source code and must allow distribution in source code as well as compiled form. as well as compiled form.

Where some form of a product is not Where some form of a product is not distributed with source code, there must distributed with source code, there must be a well-publicized means of obtaining be a well-publicized means of obtaining the source code for no more than a the source code for no more than a reasonable reproduction cost preferably, reasonable reproduction cost preferably, downloading via the Internet without downloading via the Internet without charge. The source code must be the charge. The source code must be the preferred form in which a programmer preferred form in which a programmer would modify the program. would modify the program.

FOSFOSSS

3. Derived Works3. Derived Works

The license must allow modifications The license must allow modifications and derived workand derived work

must allow them to be distributed must allow them to be distributed under the same terms as the license under the same terms as the license of the original software. of the original software.

FOSFOSSS4. Integrity of The Author's Source 4. Integrity of The Author's Source

CodeCode The license must explicitly permit The license must explicitly permit

distribution of software built from distribution of software built from modified source code. modified source code.

The license may require derived The license may require derived works to carry a different name or works to carry a different name or version number from the original version number from the original software. software.

FOSFOSSS5. No Discrimination Against Persons 5. No Discrimination Against Persons

or Groupsor Groups

The license must not discriminate The license must not discriminate against any person or group of against any person or group of persons. persons.

FOSFOSSS6. No Discrimination Against Fields of 6. No Discrimination Against Fields of

EndeavorEndeavor

The license must not restrict anyone The license must not restrict anyone from making use of the program in a from making use of the program in a specific field of endeavor. specific field of endeavor.

For example, it may not restrict the For example, it may not restrict the program from being used in a program from being used in a business, or from being used for business, or from being used for genetic research. genetic research.

FOSFOSSS7. Distribution of License7. Distribution of License

The rights attached to the program The rights attached to the program must apply to all to whom the must apply to all to whom the program is redistributed without the program is redistributed without the need for execution of an additional need for execution of an additional license by those parties. license by those parties.

FOSFOSSS8. License Must Not Be Specific to a 8. License Must Not Be Specific to a

ProductProduct The rights attached to the program must The rights attached to the program must

not depend on the program's being part not depend on the program's being part of a particular software distribution. of a particular software distribution.

If the program is extracted from that If the program is extracted from that distribution and used or distributed distribution and used or distributed within the terms of the program's license, within the terms of the program's license, all parties to whom the program is all parties to whom the program is redistributed should have the same rights redistributed should have the same rights as those that are granted in conjunction as those that are granted in conjunction with the original software distribution. with the original software distribution.

FOSFOSSS9. License Must Not Restrict Other 9. License Must Not Restrict Other

SoftwareSoftware The license must not place The license must not place

restrictions on other software that is restrictions on other software that is distributed along with the licensed distributed along with the licensed software. software.

For example, the license must not For example, the license must not insist that all other programs insist that all other programs distributed on the same medium must distributed on the same medium must be open-source software. be open-source software.

FOSFOSSS10. License Must Be Technology-10. License Must Be Technology-

NeutralNeutral

No provision of the license may be No provision of the license may be predicated on any individual predicated on any individual technology or style of interface. technology or style of interface.

Now we will see Now we will see http://tripod.com

As a FOSS for web-site designingAs a FOSS for web-site designing

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For more details visit my site at

http://drsridhar.tripod.com

For your queries, email to me :

[email protected]