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3. – Lehrangebote – Lehre DE –
XML-Überblick, Einsatzbeispiele, XML Werkzeuge, Ausblick und zukünftige Entwicklungen.
Unternehmer, Fach- und Führungskräfte.
Über XML.
• Was ist XML ?
• Was ist dran ?
• Was ist neu an XML ?
Fast alle Konzepte, die in XML verwendet werden sind nicht neu.
• Woher aber, kommt diese Akzeptanz ?
XML bietet die Möglichkeit, Daten so zu strukturieren, dass sie Regeln entsprechen, die man selbst festlegen darf.
Auf diese Weise strukturierte Daten bezeichnen wir als Dokumente.
Ein XML-Dokument baut sich aus sogenannten ELEMENTEN auf.
Diese Elementen tragen Namen, die bei der Dokumententwicklung vergeben werden können.
Diese Elementnamen können als Beschreibungsdaten sowohl direkt von Menschen gelesen und verstanden werden, als auch von Suchmaschinen indiziert werden.
Damit ist potentiell eine bessere Qualität bei der Suche nach Inhalten im Internet möglich.
Dennoch bewirkt das XML-Format von Dokumenten alleine noch nicht viel.
Es sind eher die anwendungsorientierten Formate, die in XML notiert sind, die wirklichen Gewinn aus diesem Format ziehen können.
In diesem Sinn ist XML lediglich eine Basistechnologie.
Wenn Sie XML als Basis für ein Projekt wählen, dann finden Sie Zugang zu einer großen und wachsenden Ansammlung von Werkzeugen.
Und, da XML als eine W3C-Entwicklung lizenzfrei ist, können Sie Ihre eigene Software drum herum bauen, ohne jemandem etwas zu bezahlen.
Die große und wachsende Unterstützung bedeutet, dass Sie auch nicht an einen einzigen Anbieter gebunden sind.
Ziel: Überblick über XML gewinnen, Fähigkeit erwerben, mit XML zu arbeiten.
XML - Extensible Markup Language (XML) 1.0 - ist eine Familie von Techniken: – STICHWÖRTER –
Today - Architecture of the WORLD WIDE WEB
Tim Berners-Lee : – Design Issues – Architectural and philosophical points
W3C Recommendation 15 December 2004
The World Wide Web uses relatively simple technologies with sufficient scalability, efficiency and utility that they have resulted in a remarkable information space of interrelated resources, growing across languages, cultures, and media.
• In an effort to preserve these properties of the information
space as the technologies evolve, this architecture document discusses the core design components of the Web.
• They are identification of resources, representation of resource state, and
the protocols that support the interaction between agents and resources in the space.
We relate core design components, constraints, and good practices to the principles and properties they support.
Copyright
© 2002-2004 W3C
® World Wide Web Consortium
(
MIT Massachusetts Institute of Technology,
ERCIM
European Research Consortium for Informatics and Mathematics,
Keio University Japan ).
All Rights Reserved. W3C liability,
trademark,
document use and
software licensing rules apply.
W3C's (World Wide Web Consortium) mission is:
– To lead the World Wide Web to its full potential –
by developing protocols and guidelines that ensure long-term growth for the Web.
W3C Develops Web Standards and Guidelines.
In order for the Web to reach its full potential, the most fundamental Web technologies must be compatible with one another and allow any hardware and software used to access the Web to work together.
W3C refers to this goal as Web interoperability.
By publishing open (non-proprietary) standards for Web languages and protocols,
W3C seeks to avoid market fragmentation and thus Web fragmentation
Tim Berners-Lee , W3C Director and inventor of the World Wide Web.
Tim Berners-Lee
and others created W3C as an industry consortium dedicated to building consensus around Web technologies.
Mr. Berners-Lee, who invented the
World Wide Web in March 1989 while working at the
European Organization for Nuclear Research
(CERN),
has served as the W3C Director since W3C was founded, in 1994.
Weaving the Web
by Tim Berners-Lee
with Mark Fischetti.
The original design and ultimate destiny of the WWW, by its inventor.
Ca. ... Std. Vertiefung durch Einzelgespräche ist möglich
Hinweis:Der Referent Dipl. Ing. Johann Magori -CAE Systemspezialist-
Mitglied der Ingenieurkammer des Landes Hessen.
The following two quotes were denigrated in a recent article:
1) There really is no difference between a document and a database.
2) XML data is fundamentally different from relational data
[relational structure] can led to inefficiencies in queries and retrievals.
While both of these claims were denounced,
they both do contain substantial truth.
This article will consider to what extent they are true.
It will also present XML as a reasonable data model with characteristics of special interest.
Natural language is more general, expressive and difficult than relational databases. Nevertheless, texts certainly do store data and
do require a model (background knowledge) to be information try reading in a foreign language or in an unknown theoretical field in
your own language.
Since natural language is a proliferating machine-readable data source, thanks to the web, it is of
legitimate interest as a data object. Unfortunately the problem of extracting data from general text is not solved, perhaps not even solvable.
XML offers an approach in which the users of language can mark the significant factual content of text.
The raison d’etre of XML is marking, not data management. However to mark content implies that some level of data management must be inherent. Moreover the simple, hierarchical structure of XML, the expressiveness of tags and the flexible range of constraints available through the DTD (a BNF equivalent) creates a data model adaptable to many sources text, formula, database or programmatic data.
This article proceeds by examining Pascal’s definition of data model. A simple data model for XML is given and is examined against Pascal’s definition of and requirements for a data model. Some characteristics unique to XML are shown and an argument is made that it is simple in a meaningful sense.
Contact Information:
K. R. Riggs
CIS Department Florida A&M University
Tallahassee, FL 32307
<riggs@cis.famu.edu>
Florida A&M University. Dr. Riggs
In this tutorial I present what I think are the essential concepts of XML, and hopefully will convince you that despite the hype, XML is important for presentation, exchange, and management of information.
(André Bergholz)The combination of hypertext and a global Internet started a revolution. A new ingredient, XML, is poised to finish the job.
Representing and organizing information in libraries has a long tradition of using rules and standards.
As the very first standard encoding format forbibliographic data in libraries, MAchine Readable Cataloging (MARC) format is being joined by a large number of new formats since the late 1980s.
The new formats, mostly SGML/HTML based, are actively taking a role in representing and organizing networked information resources.
This article briefly describes the historical connection between MARC and the newer formats for representing information and the current development in XML applications
that will benefit information/knowledge management in the new environment.
STEP can be used to exchange data between CAD, Computer-aided manufacturing, Computer-aided engineering, Product Data Management/EDM and other CAx systems. STEP is addressing product data from mechanical and electrical design, Geometric dimensioning and tolerancing, analysis and manufacturing, with additional information specific to various industries such as automotive, aerospace, building construction, ship, oil and gas, process plants and others.
STEP is developed and maintained by the ISO technical committee TC 184, Technical Industrial automation systems and integration,
sub-committee SC4 Industrial data.
Like other ISO and IEC standards STEP is copyright by ISO and is not freely available........
PAN EUROPEAN - INTERCONNECTED KNOWLEDGE POOLS - ENGINEERING NETWORKING. (MS-Word Format)
A federated STEP based - Systems Engineering -
Semantic Web based Services/Semantic Community Knowledge Web Portals EU/SME.
Digital Library and Grid technology "e-Learning" :
" COOPERATE PLUS" (MS-Word Format)
"LEONARDO DA VINCI" Community Vocational Training Action Programme -
in the field of IT & C and CAD/CAM for young professionals to develop teleworking projects.
- Private information is practically the source of every large modern fortune -
" Oscar Wilde "
The European Community has defined a new strategic goal:
- to become the most competitive and dynamic knowledge-based economy in the world. -
"European Council - March 2000-Lisbon / Barcelona 2002"
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