Overview and Introduction
XML Foundations (INFOSYS 242)
Erik Wilde, UC Berkeley iSchool
Tuesday, August 29, 2006
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This work is licensed under a Creative Commons |
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This work is licensed under a Creative Commons |
The Extensible Markup Language (XML) has been introduced in 1998 to enable content providers to publish their content on the Web in an application-specific format. HTML was considered as conveying not enough semantics, since its only purpose was (and is) the preparation of content for Web-based publishing. XML was the first step towards machine-readable data formats for the Web, a trend that since its invention has been taken to higher levels with the idea of the Semantic Web. XML appeared when the Web was in the steepest part of its success curve, and since then has taken over as the globally accepted format for the exchange of machine-readable structured data.
http://dret.net/lectures/xml-fall06/majordomo@sims.berkeley.edusubscribe i242242.xml for importing the syllabus into SylViAtoc.html for displaying the summary on the course's Web pagea(all slides), and
s(smaller font) a couple of times
http://dret.net/glossary/http://dret.net/biblio/understandHTML pages
dead ends
dead end(from a machine's point of view)
online
understandingis the key term here: application semantics!
SGML on the Web
XML is the ASCII for the 21st century
security through obscurityprinciple inadvertently
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author = "Tim Bray and Jean Paoli and C. Michael Sperberg-McQueen and Eve Maler and Fran\c{c}ois Yergeau",
title = "Extensible Markup Language (XML) 1.0 (Fourth Edition)",
howpublished = "World Wide Web Consortium, Recommendation REC-xml-20060816",
month = aug,
year = 2006,
uri = "http://www.w3.org/TR/2006/REC-xml-20060816",
abstract = "The Extensible Markup Language (XML) is a subset of SGML that is completely described in this document. Its goal is to enable generic SGML to be served, received, and processed on the Web in the way that is now possible with HTML. XML has been designed for ease of implementation and for interoperability with both SGML and HTML."
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understoodto make the mapping
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self-describing
self-explanatory
describing
self-describing
self-describingand
self-explanatory?
self-describingmeans, you can guess a lot, but you maybe wrong
viewsof the same content)
bad XML, complain about it
reusable shared concepts