1. Intro About Web

2. Web Definitions Web means the following: –HTTP (or HTTPS) protocol; HTTP server is called Web-server, HTTP clients are e.g. browsers and other devices. –Hypertext markup language like HTML –URL addresses From other perspective Web is a certain approach to programming

3. Web and Various Kinds of Programs There are various kinds of programs, e.g. Stand-alone programs Client-server programs P2P programs Web deals with client-server programs

4. Web and Multi-Tier Programs Data Tier Application Tier Presentation Tier HTTP protocol may be used for many purposes (e.g. SOAP and Web Services), but Web programming traditionally is centered on presentation tier.

5. Presenting data There could be Proprietary formats Open formats and also Platform-specific presentation Platform-independent presentation Web favors open, platform-independent presentation (the price: often has to use low- precision presentation)

6. Distributiveness of Data Centralized data Distributed data Web architectures deal with...

7. Structure of Data Non-structured data (byte streams) Semi-structured data (DOM trees, hypertext) Highly structured data (Fixed length records, database tables) Web technologies are useful mostly for...

8. Web programming may have various slants... Rich client (applets, AJAX, Flash) vs. thin clients (HTML) - events may be processed at client or server side By type of aplication (CMS, EIM, Media, social, portals, search engines) Presentational markup vs. Descriptive markup Different server-side technology, MSIE/Firefox browsers... User role asymmetry (Web 1.0 vs. Web 2.0).