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Web Site Development Tools

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Chapter 4 Web Site Development Tools – PowerPoint PPT presentation

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Title: Web Site Development Tools


1
Chapter 4
  • Web Site Development Tools

2
Objectives
  • In this chapter, you will learn to
  • Consider the importance of planning when
    developing an e-business Web site
  • Describe the markup languages used to create
    Web-based documents
  • Identify Web development applications
  • Describe the multimedia tools available for Web
    pages
  • Discuss ways to add interactivity to Web pages

3
Planning an Effective E-Business Site
Valued Gateway Client
  • Before creating a Web site for your e-business
  • Define Web sites goals, objectives, and overall
    purpose
  • Be aware of customers needs, such as site
    navigation, customer service, etc.
  • Utilize state-of-art graphics, video, audio to
    keep visitors interest

4
Markup Languages
  • The basic technology used for displaying Web
    pages in a Web browser
  • Markup languages define how Web applications
    display documents
  • Languages used for processing data on the World
    Wide Web include
  • Standard Generalized Markup Language (SGML)
  • Hypertext Markup Language (HTML)
  • Dynamic Hypertext Markup Language (DHTML)
  • Extensible Markup Language (XML)

5
Standard Generalized Markup Language (SGML)
  • Specifies descriptive markup within a document
    to define document structure
  • Portable
  • Uses Document Type Definition files to define
    types
  • Uses tags to define different elements of the
    document
  • If you are familiar with early, basic word
    processing software you see similarities

6
Hypertext Markup Language (HTML)
  • The most widely used markup language on the Web
  • SGML-based
  • Tags tell your Web browser how to display the
    page
  • Web browser uses tag to parse documents
  • HTML Tutorial (also accessible vie the
    Web-accessible Resources link of the course Web
    page)

7
HTML Parsing
  • Web browser reads document and interprets tags,
    like painter interprets landscape
  • The 'head' and the 'body' are passed separately
  • Web browser reads the HTML document from top to
    bottom, picks out elements such as title or
    blocks of text
  • The Web browser displays the elements
    appropriately in the Web browser window

8
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9
HTML Tag Types
  • Standalone tags
  • Define individual Web page elements or contain
    information about the whole Web page ltimg
    srcpic.gifgt
  • Container tags
  • Surround and modify a Web page element
  • Used in pairs to mark the beginning and ending of
    Web page elements ltbgtbold textlt/bgt
  • Some Web browsers are "forgiving" when they parse
    tags, they try to correct simple mistakes in tag
    construction

10
Dynamic Hypertext Markup Language (DHTML)
  • Adapts content on the fly
  • Changes the content to accommodate different
    screen sizes (the screen size, type of browser,
    operating system, and other characteristics can
    be read from your computer so that the display is
    customized to your needs)
  • Changes Web page objects based on viewer input
  • DHTML is used in advertising banners that appear
    on Web pages

11
DHTML Display Detection/Response
  • Two examples of menu positioning using DHTML
  • DHTML adjusts the size of menus, text, and other
    HTML objects to preserve perspective
  • Top display uses 640 x 480 screen resolution
  • Bottom display uses 1024 x 768 screen resolution

12
Extensible Markup Language (XML)
  • XML tags are used to provide information about
    the content itself
  • Tags are customizable, both sender and receiver
    of the XML document must agree on tag definitions

13
Web Development Applications
  • Present WYSIWYG (What You See Is What You Get)
    view of a Web page
  • Include tools such as templates and wizards for
    creating Web pages
  • Automatically generate the appropriate HTML tags
    as the Web author creates the Web page content

14
Microsoft FrontPage
  • Works well with Microsoft Internet Information
    Server (IIS)
  • Includes wizards and templates to simplify Web
    page design
  • Implements HTML code and features specific to
    Microsoft IIS that are not compatible with other
    Web servers and browsers - note that the pages
    still display but the additional features (such
    as blinking text) display in a static environment
    (i.e. the text does not blink)

15
Microsoft Visual InterDev
  • Microsofts high-end Web development application
  • Incorporates Web site management tools with
    templates and wizards for Web page creation

16
Macromedia HomeSite
  • Displays either HTML or WYSIWYG
  • Includes some Web site administration tools
  • Doesnt contain the breadth of templates and
    wizards that FrontPage includes
  • Requires better understanding of markup languages
  • HomeSite home page

17
Macromedia Dreamweaver
  • Offers broader selection of templates and online
    wizards, it is very popular
  • Online help and feature-rich environment provide
    simplified work environment for new Web authors

18
Macromedia UltraDev
  • Macromedias most full-featured Web development
    application
  • Similar to Visual InterDev
  • Creates HTML code that is displayed properly by
    major Web browsers

19
Adobe GoLive
  • Displays either HTML or WYSIWYG simultaneously
  • Excellent learning tool for beginners
  • GoLive web page

20
Multimedia Tools
  • Add sophisticated multimedia features such as
    animated graphics, video clips, and sound to Web
    site
  • Require enhancements to
  • Web browsers, (plug-ins)
  • Web servers to process media
  • Graphics programs to create more professional
    looking and appealing graphics

21
Web Browser Plug-ins
  • Plug-in software adds special features to a Web
    browser, such as the ability to play sound and
    video files that are transmitted over the
    Internet
  • Plug-in software is generally provided free to
    end-users
  • E-businesses must purchase server software to
    deliver audio or video over the Internet
  • Providers of streaming media applications
    included Apple Computer, Inc., Microsoft, and
    RealNetworks, Inc.

22
Macromedia Flash and Flash Player
  • Flash is used to create high-quality graphics and
    sound for delivery over low-speed (modem)
    connections
  • Requires installation of the Macromedia Flash
    Player plug-in

23
Streaming Media
  • Refers to sound and video files that are
    transmitted continuously, similar to a television
    signal, across the Internet
  • Plug-ins that play downloaded video files as well
    as streaming video and sound files include
  • Quicktime (Apple Computer, Inc.)
  • Windows Media Player (Microsoft)
  • RealOne (RealNetworks, Inc.)
  • Each plug-in uses its own proprietary video format

24
Compression Techniques
  • Compression techniques are used to shrink sound
    or video clips for easy transmission across the
    Internet without degrading quality
  • ISO Motion Picture Experts Group develops the
    standards for multimedia compression
  • MPEG-1 provides a resolution of 352x240 at 30 fps
    with 24-bit color
  • MPEG-2 provides a resolution of 720x480 at 30 fps
    with 24-bit color
  • MPEG-3 combines MPEG-1 video with MP3 (MPEG
    Layer-3) audio

25
Adobe Acrobat and Acrobat Reader
  • Creates/displays documents in portable document
    format (PDF)
  • Enables portability of documents
  • Acrobat Reader offered as freeware by Adobe
  • Purchase of Adobe Acrobat required to convert
    documents created by other applications

26
Adobe Photoshop Graphic Editor
  • Create Web page designs using sophisticated
    graphics
  • Provides tools for
  • Selecting image compression
  • Positioning and alignment of Web page images

27
Interactive Web Sites
  • Involves customers in the online experience
  • Search for product or service information
  • Select and custom-configure products
  • Purchase products directly from the Web site
  • Get online customer support
  • Interactive Web sites become sticky, meaning
    that viewers spend more time at the site

28
HTML Forms
  • Similar to paper form
  • Used to collect data from Web page viewers
  • Forms may contain
  • Text entry boxes
  • Check boxes
  • Option buttons
  • Drop-down lists
  • Collected data sent to Web server

29
Server-Side Technologies
  • Operate on the server side of a Web browser/Web
    server relationship
  • Permit creation of customized Web pages for
    viewers
  • Pages are generated by
  • Using a Web page template to define the layout of
    information
  • Populating the template with variable, or dynamic
    data in response to the request received from the
    Web browser

30
Database Driven Web Sites
  • Use information stored in a database on a Web
    server to respond to requests received from a Web
    browser
  • Databases organize data into records and tables
    containing related information
  • Using search criteria received from the Web
    browser, server-side technologies retrieve,
    format, and send data to the Web browser

31
Macromedia ColdFusion
  • Use to retrieve and format information from
    database
  • ColdFusion Studio is used to create Web templates
    that the Web server completes on the fly to
    create the Web pages
  • ColdFusion Server runs on the Web server itself,
    formatting data and sending Web pages to users

32
ColdFusion Markup Language
  • Embeds tags used in templates for processing data
    before sending to Web browser
  • Processed on the server by ColdFusion server
  • Used to create forms for collecting data and
    writing database queries

33
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34
Microsoft Active Server Pages (ASP)
  • Similar to an HTML document
  • Contains small programs called scripts that
    retrieve and process information before sending
    it to the Web browser
  • The result is that the viewer sees only the
    results, not how the results were created
  • ASP scripts are usually written in VBScript,
    which is similar to Visual Basic

35
Personal Home Page (PHP) Tools
  • Used to extract data out of a database and
    present it on the Web page
  • Uses syntax from C, Java, and Perl - but is not
    any of these
  • Embedded within HTML pages for server-side
    execution
  • Widely used with the mySQL database
  • Available as public domain software - don't be
    fooled, some very large commercial sites use
    mySQL and PERL

36
Client-Side Technologies
  • Operate on the client-side of a Web browser/Web
    server relationship
  • Manipulate data received with Web pages
  • Usually downloaded as part of the Web page
  • Performs limited functions, such as
  • listening for data
  • performing calculations, etc.
  • Less secure that server-side technologies

37
Client-Side Technologies
  • Applets are small applications, such as a utility
    or limited-function program, and run from the Web
    browser
  • A sandbox is a virtual environment used to run
    applets, providing security and portability
  • Unfortunately, applets have been known to get
    outside of the sandbox
  • JavaScript is used by the Web browser to add
    interactive functions to HTML pages

38
Java and the Virtual Sandbox
  • Java is an interpreted language
  • The source code of a Java program is compiled
    into an intermediate language called bytecode
    which must be converted (interpreted) into
    machine code at runtime
  • Java Virtual Machine (JVM) interprets bytecode
    into machine code and runs it
  • Java programs are not dependent on any specific
    hardware and will run in any computer with the
    Java Virtual Machine software

39
ActiveX
  • Provides external Internet access, internal
    intranet services, and management of
    Internet-related technologies such as Web
    servers, Web browsers, and Internet-based e-mail
  • Used to establish and manage external business
    Web sites to sell products and services, provide
    customer support, and gather information about
    potential customers and the marketspace
  • Internet-based e-mail allows businesses to
    maintain contact with customers and suppliers
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