Web 2.0: Concepts and Applications 11 The Web Becomes 2.0

Overview  The World Wide Web has changed the way that people –Do business –Communicate –Share information  The Web has evolved from a collection of Web sites to supporting Web applications  Web 2.0 is characterized by interactive applications Chapter 1: The Web Becomes 2.02

Overview Chapter 1: The Web Becomes 2.03

How the Web Has Changed  Early Web sites contained mostly text and small graphics  Graphics were minimized to decrease the time it takes to load a page using a slower Internet connection  Web sites were not always intuitive Chapter 1: The Web Becomes 2.04

How the Web Has Changed  Newer Web sites provide users with a rich browsing experience –Customizable layout –Bold graphics –Tabs –Additional services Chapter 1: The Web Becomes 2.05

How the Web Has Changed Chapter 1: The Web Becomes 2.06

Social and Technological Developments that Led to Web 2.0  Web 2.0 is the result of several evolutions: –Connectivity is available almost everywhere –The personal computer evolved into an appliance –Mobile phones are capable of accessing the World Wide Web –Web browsers are easy-to-use –Web-based applications were developed for many devices –Web developers deploy new versions of software applications –Society embraced technological changes Chapter 1: The Web Becomes 2.07

Social and Technological Developments that Led to Web 2.0 Chapter 1: The Web Becomes 2.08

Social and Technological Developments that Led to Web 2.0  In the 1990s, many new companies called dot- coms used the Web to conduct business –Internet service providers –Amazon –Priceline  Many dot-coms went out of business by 2001  The Web became a platform for social networking, collaboration, and communication Chapter 1: The Web Becomes 2.09

The Web Browser  A Web browser is a software application for accessing and viewing Web pages –Mosaic Later marketed as Netscape First graphical interface to the World Wide Web –Internet Explorer Became popular when distributed by Microsoft with Windows 95 –Firefox –Safari –Google Chrome Chapter 1: The Web Becomes 2.010

The Web Browser Chapter 1: The Web Becomes 2.011

The Web Browser  Modern Web browsers have streamlined their appearance  Tabbed browsing allows users to open new Web pages in a single browser window Chapter 1: The Web Becomes 2.012

The Web Browser Chapter 1: The Web Becomes 2.013

Features of Web 2.0 Applications  Online conversations –Blogs –Wikis –Sharing media –Collaboration  Digg is a Web site that allows its readers to submit interesting news stories that they find online and digg, or vote for, the news stories that others submitted Chapter 1: The Web Becomes 2.014

Features of Web 2.0 Applications Chapter 1: The Web Becomes 2.015

Features of Web 2.0 Applications  To participate in Web 2.0 applications, you likely will need a username and password –A username is a unique code name that identifies you –A password is associated with your username You should achieve greater password strength –During the authentication process, the application verifies your credentials Chapter 1: The Web Becomes 2.016

Features of Web 2.0 Applications Chapter 1: The Web Becomes 2.017

WEB Read/Write  Web 2.0 is often referred to as a read/write Web, or a database-backed Web –Web applications read from or write to a database  A Web server processes requests for Web pages sent over the Internet from a Web client –Client-server model Chapter 1: The Web Becomes 2.018

WEB Process Chapter 1: The Web Becomes 2.019

WEB Process Chapter 1: The Web Becomes 2.020

Basic WEB Architecture Chapter 1: The Web Becomes 2.021

Data Driven WEB Architecture Chapter 1: The Web Becomes 2.022

Recent WEB Applications Architecture Chapter 1: The Web Becomes 2.023

Client Tier Chapter 1: The Web Becomes 2.024

Service Tier Chapter 1: The Web Becomes 2.025

The Web as a Platform for Running Applications Chapter 1: The Web Becomes 2.026

Service Oriented Application (SOA) Chapter 1: The Web Becomes 2.027

Service Oriented Application (SOA) Chapter 1: The Web Becomes 2.028

Service Oriented Application (SOA) Chapter 1: The Web Becomes 2.029

Service Oriented Application (SOA) Chapter 1: The Web Becomes 2.030

Front-End Chapter 1: The Web Becomes 2.031

Front-End Chapter 1: The Web Becomes 2.032

Standard Bodies Chapter 1: The Web Becomes 2.033

Front-End - Client-side Chapter 1: The Web Becomes HTML CSS XHTML DOM JavaScript | jQuery Java Applet Adobe Flex Microsoft Silverlight

Software Accessible on Many Devices  You can browse Web content from almost anywhere on almost any electronic device that has a screen Chapter 1: The Web Becomes 2.035

Software Accessible on Many Devices  In order for a Web application to run on different devices, it is important that they are designed in such a way that separates the process of accessing information from the process of displaying that information Chapter 1: The Web Becomes 2.036

Software Accessible on Many Devices Chapter 1: The Web Becomes 2.037

Rich User Experience  Technologies such as AJAX, Adobe Flash, and Microsoft Silverlight allow Web browsers to display dynamic content without waiting for previous communication with the Web server to complete –Google Maps uses AJAX to allow the user to reposition a map or zoom in and out by dragging Only the map portion of the window will be updated Chapter 1: The Web Becomes 2.038

Rich User Experience Chapter 1: The Web Becomes 2.039

Rich User Experience  Predictive look-ahead, or AutoComplete, provides suggestions of valid responses based on letters that a user enters in a text box Chapter 1: The Web Becomes 2.040

Rich User Experience  AJAX relies on standard Web technologies to provide an engaging user experience  A browser plug-in is a software component that enables dynamic, animated display and functionality within a Web browser –Flash –Silverlight  Many rich Internet applications allow users to create, stream, or view video Chapter 1: The Web Becomes 2.041

Rich User Experience Chapter 1: The Web Becomes 2.042

Summary  Web 2.0 is the name given to the shift in how people have come to use the World Wide Web  Many Web 2.0 sites allow users to share knowledge, opinions, images, or videos  Web 2.0 promotes a culture of participation  Users interact with Web 2.0 applications from a Web browser and variety of Internet-connected devices  Many Web applications use AJAX, Flash, and Silverlight Chapter 1: The Web Becomes 2.043