Database driven websites
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Database-Driven Websites. Blogs, Wikis, Etc. . What is `The Web'?. A distributed document delivery service implemented using application-level protocols on the Internet A tool for collaborative writing and community building A framework of protocols that support e-commerce

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Database driven websites

Database-Driven Websites

Blogs, Wikis, Etc.


What is the web

What is `The Web'?

  • A distributed document delivery service implemented using application-level protocols on the Internet

  • A tool for collaborative writing and community building

  • A framework of protocols that support e-commerce

  • A network of co-operating computers interoperating using HTTP and related protocols to form a sub-net of the Internet

  • A large, cyclical, directed graph made up of webpages and links


What is the web1

What is `The Web'?

  • A distributed document delivery service implemented using application-level protocols on the Internet

  • A tool for collaborative writing and community building

  • A framework of protocols that support e-commerce

  • A network of co-operating computers interoperating using HTTP and related protocols to form a sub-net of the Internet

  • A large, cyclical, directed graph made up of webpages and links


Databases and the www

Databases and the WWW

  • B2B is important

    • Using the WWW as a distributed document delivery service

    • Using XML and XML-based tools to package and share data, place orders, maintain inventory, …

  • Self-organizing communities are another, but less obvious application of the WWW


Self organizing communities

Self Organizing Communities?

The standard HTML model is

  • Author/designer makes a webpage or website

  • The author decides what the content is and where the links are

    • Links out of website

    • Link targets in the website

  • Reader uses the website but cannot change it

    • Only input is through forms (or hacking)

    • More like reading a magazine than using a ‘shared space’


Self organizing communities1

Self Organizing Communities

  • Radical compared to HTML Model

    • People who come together to create a linked set of webpages

    • Could also be a MUD or a MOO (although much less frequent than before)

  • Types of communities

    • SparrowWeb – community shares templates

    • Wiki – multiple authors

    • Blog – author and commentators


Where is the database

Where is the Database?

  • It is hidden on the server-side

    • We infer its presence but it is not really needed

    • Type, schema, etc. are unimportant

  • It is not an interface component

    • The author might not even know about it


What is a blog

What is a Blog?

  • http://jilltxt.net/archives/blog_theorising/final_version_of_weblog_definition.html

  • http://www.gyford.com/phil/writing/2003/01/05/an_introduction_.php

  • Who cares?

    • Part of the societal changes brought about by the WWW

    • New applications of hypertext

    • Opportunity for study within (and outside of) CS


Database driven websites

RSS

  • What is it?

    ‘Real Simple Syndication’

    (aka ‘Rich Site Summary’)

  • What is it good for?

    • Pushing data to web clients

    • Originally for website and news updates

    • Now for sharing all types of information between websites, and for podcasting


How does rss function

How Does RSS Function?

  • Broadcast text to subscribers using a

  • simple and small XML-based language


Database driven websites

<?xml version="1.0" encoding="ISO-8859-1" ?>

<rss version="2.0">

<channel>

<title>Dalhousie CS4173 Examples</title>

<link>http://www.cs.dal.ca/~jamie/…/examples/</link>

<description>real WWW code</description>

<item>

<title>CGI in general</title>

<link>http://…/#CGI</link>

<description>What CGI is & How to use it</description>

</item>

<item>

<title>Self-generating CGI forms</title>

<link>http://…</link>

<description>Way kool demos</description>

</item>

</channel>

</rss>

Adapted from

W3schools example


Blog characteristics

Blog Characteristics


Wiki what s that

Wiki what’s that?

  • http://en.wikipedia.org/wiki/Wiki

  • StudleyCaps or MixedCapitalization

    • Indicates WikiWord (significant term)

    • Each WikiWord has its own webpage


Wiki characteristics

Wiki Characteristics


What about sparrow web

What About Sparrow Web?

  • http://www2.parc.com/istl/projects/sparrow/


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