Search (19 results, page 1 of 1)

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Footnote

Chapter 4 introduces XML internal and external pointing and linking technologies. XML Link Language (XLL, now XLink) provides unidirectional, multi-ended, and typed linking. XPointer, used with XLink, provides addressing into the interior of XML documents. XPath operates an the logical structure of an XML document, creating a tree of nodes. Used with both XPointer and XSLT, it permits operations an strings, numbers, and Boolean expressions in the document. The final chapter, "Getting Started" argues for the adoption of a tool for XML production. The features and functionality of various tools for content development, application development, databases, and schema development provide an introduction to some of the available options. Roy Tennant is weIl known in the library community as an author (bis column "Digital Libraries" has appeared in Library Journal since 1997 and he has published Current Cites each month for more than a decade), an electronic discussion list manager (Web4Lib and XML4Lib), and as the creator and manager of UC/Berkeley's Digital Library SunSITE. Librarians have wondered what use they might make of XML since its beginnings. Tennant suggests one answer: "The Extensible Markup Language (XML) has the potential to exceed the impact of MARC an librarianship. While MARC is limited to bibliographic descriptionand arguably a subset at that, as any archivist will tell you-XML provides a highly-effective framework for encoding anything from a bibliographic record for a book to the book itself." (Tennant, p. vii) This slim paperback volume offers librarians and library managers concerned with automation projects "show and teIl" examples of XML technologies used as solutions to everyday tasks and challenges. What distinguishes this work is the editor and contributors' commitment to providing messy details. This book's target audience is technically savvy. While not a "cookbook" per se, the information provided an each project serves as a draft blueprint complete with acronyms and jargon. The inclusion of "lessons learned" (including failures as well as successes) is refreshing and commendable. Experienced IT and automation project veterans will appreciate the technical specifics more fully than the general reader.
Tennant's collection covers a variety of well- and lesser-known XML-based pilot and prototype projects undertaken by libraries around the world. Some of the projects included are: Stanford's XMLMARC conversion, Oregon State's use of XML in interlibrary loaning, e-books (California Digital Library) and electronic scholarly publishing (University of Michigan), the Washington Research Library Consortium's XML-based Web Services, and using TEI Lite to support indexing (Halton Hills Public Library). Of the 13 projects presented, nine are sited in academe, three are state library endeavors, and one is an American public library initiative. The projects are gathered into sections grouped by seven library applications: the use of XML in library catalog records, interlibrary loan, cataloging and indexing, collection building, databases, data migration, and systems interoperability. Each project is introduced with a few paragraphs of background information. The project reports-averaging about 13 pages each-include project goals and justification, project description, challenges and lessons learned (successes and failures), future plans, implications of the work, contact information for individual(s) responsible for the project, and relevant Web links and resources. The clear strengths of this collection are in the details and the consistency of presentation. The concise project write-ups flow well and encourage interested readers to follow-up via personal contacts and URLs. The sole weakness is the price. XML in Libraries will excite and inspire institutions and organizations with technically adept staff resources and visionary leaders. Erik Ray has written a how-to book. Unlike most, Learning XML is not aimed at the professional programming community. The intended audience is readers familiar with a structured markup (HTML, TEX, etc.) and Web concepts (hypertext links, data representation). In the first six chapters, Ray introduces XMUs main concepts and tools for writing, viewing, testing, and transforming XML (chapter 1), describes basic syntax (chapter 2), discusses linking with XLink and XPointer (chapter 3), introduces Cascading Style Sheets for use with XML (chapter 4), explains document type definitions (DTDs) and schemas (chapter 5), and covers XSLT stylesheets and XPath (chapter 6). Chapter 7 introduces Unicode, internationalization and language support, including CSS and XSLT encoding. Chapter 8 is an overview of writing software for processing XML, and includes the Perl code for an XML syntax checker. This work is written very accessibly for nonprogrammers. Writers, designers, and students just starting to acquire Web technology skills will find Ray's style approachable. Concepts are introduced in a logical flow, and explained clearly. Code samples (130+), illustrations and screen shots (50+), and numerous tables are distributed throughout the text. Ray uses a modified DocBook DTD and a checkbook example throughout, introducing concepts in early chapters and adding new concepts to them. Readers become familiar with the code and its evolution through repeated exposure. The code for converting the "barebones DocBook" DTD (10 pages of code) to HTML via XSLT stylesheet occupies 19 pages. Both code examples allow the learner to sec an accumulation of snippets incorporated into a sensible whole. While experienced programmers might not need this type of support, nonprogrammers certainly do. Using the checkbook example is an inspired choice: Most of us are familiar with personal checking, even if few of us world build an XML application for it. Learning XML is an excellent textbook. I've used it for several years as a recommended text for adult continuing education courses and workshops."
Weitere Rez in: Electronic library 19(2001) no.1, S.51-52 (M. Keary)

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Abstract

Increasingly, XML applications are appearing on the World Wide Web, from e-commerce to information management. In the case of libraries and archives, XML enables more flexible information management and retrieval than using MARC or a relational database management system. Describes a project to explore the use of XML and the EAD, and the development of a prototype electronic finding aid. It focuses on the technical aspects, and reviews the options available and the choices made. This is done within the setting of a small- to medium-sized archive with minimal tools and resources.

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Footnote

Chapter 4 introduces XML internal and external pointing and linking technologies. XML Link Language (XLL, now XLink) provides unidirectional, multi-ended, and typed linking. XPointer, used with XLink, provides addressing into the interior of XML documents. XPath operates an the logical structure of an XML document, creating a tree of nodes. Used with both XPointer and XSLT, it permits operations an strings, numbers, and Boolean expressions in the document. The final chapter, "Getting Started" argues for the adoption of a tool for XML production. The features and functionality of various tools for content development, application development, databases, and schema development provide an introduction to some of the available options. Roy Tennant is weIl known in the library community as an author (bis column "Digital Libraries" has appeared in Library Journal since 1997 and he has published Current Cites each month for more than a decade), an electronic discussion list manager (Web4Lib and XML4Lib), and as the creator and manager of UC/Berkeley's Digital Library SunSITE. Librarians have wondered what use they might make of XML since its beginnings. Tennant suggests one answer: "The Extensible Markup Language (XML) has the potential to exceed the impact of MARC an librarianship. While MARC is limited to bibliographic descriptionand arguably a subset at that, as any archivist will tell you-XML provides a highly-effective framework for encoding anything from a bibliographic record for a book to the book itself." (Tennant, p. vii) This slim paperback volume offers librarians and library managers concerned with automation projects "show and teIl" examples of XML technologies used as solutions to everyday tasks and challenges. What distinguishes this work is the editor and contributors' commitment to providing messy details. This book's target audience is technically savvy. While not a "cookbook" per se, the information provided an each project serves as a draft blueprint complete with acronyms and jargon. The inclusion of "lessons learned" (including failures as well as successes) is refreshing and commendable. Experienced IT and automation project veterans will appreciate the technical specifics more fully than the general reader.
Tennant's collection covers a variety of well- and lesser-known XML-based pilot and prototype projects undertaken by libraries around the world. Some of the projects included are: Stanford's XMLMARC conversion, Oregon State's use of XML in interlibrary loaning, e-books (California Digital Library) and electronic scholarly publishing (University of Michigan), the Washington Research Library Consortium's XML-based Web Services, and using TEI Lite to support indexing (Halton Hills Public Library). Of the 13 projects presented, nine are sited in academe, three are state library endeavors, and one is an American public library initiative. The projects are gathered into sections grouped by seven library applications: the use of XML in library catalog records, interlibrary loan, cataloging and indexing, collection building, databases, data migration, and systems interoperability. Each project is introduced with a few paragraphs of background information. The project reports-averaging about 13 pages each-include project goals and justification, project description, challenges and lessons learned (successes and failures), future plans, implications of the work, contact information for individual(s) responsible for the project, and relevant Web links and resources. The clear strengths of this collection are in the details and the consistency of presentation. The concise project write-ups flow well and encourage interested readers to follow-up via personal contacts and URLs. The sole weakness is the price. XML in Libraries will excite and inspire institutions and organizations with technically adept staff resources and visionary leaders. Erik Ray has written a how-to book. Unlike most, Learning XML is not aimed at the professional programming community. The intended audience is readers familiar with a structured markup (HTML, TEX, etc.) and Web concepts (hypertext links, data representation). In the first six chapters, Ray introduces XMUs main concepts and tools for writing, viewing, testing, and transforming XML (chapter 1), describes basic syntax (chapter 2), discusses linking with XLink and XPointer (chapter 3), introduces Cascading Style Sheets for use with XML (chapter 4), explains document type definitions (DTDs) and schemas (chapter 5), and covers XSLT stylesheets and XPath (chapter 6). Chapter 7 introduces Unicode, internationalization and language support, including CSS and XSLT encoding. Chapter 8 is an overview of writing software for processing XML, and includes the Perl code for an XML syntax checker. This work is written very accessibly for nonprogrammers. Writers, designers, and students just starting to acquire Web technology skills will find Ray's style approachable. Concepts are introduced in a logical flow, and explained clearly. Code samples (130+), illustrations and screen shots (50+), and numerous tables are distributed throughout the text. Ray uses a modified DocBook DTD and a checkbook example throughout, introducing concepts in early chapters and adding new concepts to them. Readers become familiar with the code and its evolution through repeated exposure. The code for converting the "barebones DocBook" DTD (10 pages of code) to HTML via XSLT stylesheet occupies 19 pages. Both code examples allow the learner to sec an accumulation of snippets incorporated into a sensible whole. While experienced programmers might not need this type of support, nonprogrammers certainly do. Using the checkbook example is an inspired choice: Most of us are familiar with personal checking, even if few of us world build an XML application for it. Learning XML is an excellent textbook. I've used it for several years as a recommended text for adult continuing education courses and workshops."

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Footnote

Chapter 4 introduces XML internal and external pointing and linking technologies. XML Link Language (XLL, now XLink) provides unidirectional, multi-ended, and typed linking. XPointer, used with XLink, provides addressing into the interior of XML documents. XPath operates an the logical structure of an XML document, creating a tree of nodes. Used with both XPointer and XSLT, it permits operations an strings, numbers, and Boolean expressions in the document. The final chapter, "Getting Started" argues for the adoption of a tool for XML production. The features and functionality of various tools for content development, application development, databases, and schema development provide an introduction to some of the available options. Roy Tennant is weIl known in the library community as an author (bis column "Digital Libraries" has appeared in Library Journal since 1997 and he has published Current Cites each month for more than a decade), an electronic discussion list manager (Web4Lib and XML4Lib), and as the creator and manager of UC/Berkeley's Digital Library SunSITE. Librarians have wondered what use they might make of XML since its beginnings. Tennant suggests one answer: "The Extensible Markup Language (XML) has the potential to exceed the impact of MARC an librarianship. While MARC is limited to bibliographic descriptionand arguably a subset at that, as any archivist will tell you-XML provides a highly-effective framework for encoding anything from a bibliographic record for a book to the book itself." (Tennant, p. vii) This slim paperback volume offers librarians and library managers concerned with automation projects "show and teIl" examples of XML technologies used as solutions to everyday tasks and challenges. What distinguishes this work is the editor and contributors' commitment to providing messy details. This book's target audience is technically savvy. While not a "cookbook" per se, the information provided an each project serves as a draft blueprint complete with acronyms and jargon. The inclusion of "lessons learned" (including failures as well as successes) is refreshing and commendable. Experienced IT and automation project veterans will appreciate the technical specifics more fully than the general reader.
Tennant's collection covers a variety of well- and lesser-known XML-based pilot and prototype projects undertaken by libraries around the world. Some of the projects included are: Stanford's XMLMARC conversion, Oregon State's use of XML in interlibrary loaning, e-books (California Digital Library) and electronic scholarly publishing (University of Michigan), the Washington Research Library Consortium's XML-based Web Services, and using TEI Lite to support indexing (Halton Hills Public Library). Of the 13 projects presented, nine are sited in academe, three are state library endeavors, and one is an American public library initiative. The projects are gathered into sections grouped by seven library applications: the use of XML in library catalog records, interlibrary loan, cataloging and indexing, collection building, databases, data migration, and systems interoperability. Each project is introduced with a few paragraphs of background information. The project reports-averaging about 13 pages each-include project goals and justification, project description, challenges and lessons learned (successes and failures), future plans, implications of the work, contact information for individual(s) responsible for the project, and relevant Web links and resources. The clear strengths of this collection are in the details and the consistency of presentation. The concise project write-ups flow well and encourage interested readers to follow-up via personal contacts and URLs. The sole weakness is the price. XML in Libraries will excite and inspire institutions and organizations with technically adept staff resources and visionary leaders. Erik Ray has written a how-to book. Unlike most, Learning XML is not aimed at the professional programming community. The intended audience is readers familiar with a structured markup (HTML, TEX, etc.) and Web concepts (hypertext links, data representation). In the first six chapters, Ray introduces XMUs main concepts and tools for writing, viewing, testing, and transforming XML (chapter 1), describes basic syntax (chapter 2), discusses linking with XLink and XPointer (chapter 3), introduces Cascading Style Sheets for use with XML (chapter 4), explains document type definitions (DTDs) and schemas (chapter 5), and covers XSLT stylesheets and XPath (chapter 6). Chapter 7 introduces Unicode, internationalization and language support, including CSS and XSLT encoding. Chapter 8 is an overview of writing software for processing XML, and includes the Perl code for an XML syntax checker. This work is written very accessibly for nonprogrammers. Writers, designers, and students just starting to acquire Web technology skills will find Ray's style approachable. Concepts are introduced in a logical flow, and explained clearly. Code samples (130+), illustrations and screen shots (50+), and numerous tables are distributed throughout the text. Ray uses a modified DocBook DTD and a checkbook example throughout, introducing concepts in early chapters and adding new concepts to them. Readers become familiar with the code and its evolution through repeated exposure. The code for converting the "barebones DocBook" DTD (10 pages of code) to HTML via XSLT stylesheet occupies 19 pages. Both code examples allow the learner to sec an accumulation of snippets incorporated into a sensible whole. While experienced programmers might not need this type of support, nonprogrammers certainly do. Using the checkbook example is an inspired choice: Most of us are familiar with personal checking, even if few of us world build an XML application for it. Learning XML is an excellent textbook. I've used it for several years as a recommended text for adult continuing education courses and workshops."

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Abstract

Die Extensible Markup Language (XML) ist eine Metaauszeichnungssprache, die 1998 vom World Wide Web Consortium (W3C) als neue Empfehlung für Web-Anwendungen festgesetzt wurde. In XML-Dokumenten werden die hierarchische Struktur und der Inhalt der Dokumente festgelegt, aber keinerlei Angaben zum Layout gemacht. Dieses wird in so genannten Stylesheets definiert. Auf dieser strikten Trennung von Struktur und Layout beruht das große Potenzial von XML im Hinblick auf das Cross-Media-Publishing: Mit Hilfe mehrerer Stylesheets, die sich alle auf ein XML-Dokument beziehen, ist es mit relativ geringem Aufwand möglich, aus einem Datenbestand verschiedene Ausgabeprodukte zu erzeugen.Einleitend gibt die Autorin einen kurzen Überblick über die Grundzüge, den Leistungsumfang und die Funktionalitäten von XML und einigen zugehörigen Spezifikationen, die im Zusammenhang mit XML entwickelt wurden. Nachfolgend wird der Themenkomplex der Informationsmittel, wie z.B. Lexika und Enzyklopädien behandelt. Schwerpunktmäßig wird hier dargestellt, wie XML heutzutage in Verlagen zur Publikation von Informationsmitteln eingesetzt wird und welche Vor- und Nachteile eine derartige Auszeichnung der Daten mit sich bringt. Aufbauend auf diesem theoretischen Teil wird am Beispiel eines geografischen Lexikonartikels praktisch demonstriert, wie sich aus einem einmal erfassten Datenbestand verschiedene Ausgabeprodukte generieren lassen. Ein lesenswertes Werk für alle Informatiker, Programmierer und Webdesigner und andere am Thema interessierte Leser, die mehr über diese Sprache erfahren wollen.

RSWK

Cross Media Publishing / Informationsmittel / XML

Subject

Cross Media Publishing / Informationsmittel / XML

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Abstract

Thesauri are used to provide controlled vocabularies for resource classification. Their use can greatly assist document discovery because thesauri man date a consistent shared terminology for describing documents. A particular thesauras classifies documents according to an information community's needs. As a result, there are many different thesaural schemas. This has led to a proliferation of schema-specific thesaural systems. In our research, we exploit schematic regularities to design a generic thesaural ontology and specfiy it as a markup language. The language provides a common representational framework in which to encode the idiosyncrasies of specific thesauri. This approach has several advantages: it offers consistent syntax and semantics in which to express thesauri; it allows general purpose thesaural applications to leverage many thesauri; and it supports a single thesaural user interface by which information communities can consistently organise, score and retrieve electronic documents.

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Abstract

Using new communication technologies libraries must face continuously new questions, possibilities and expectations. This study discusses library-related aspects of our electronic era and how computer-related data formats affect bibliographic dataprocessing to give a summary of the most important results. First bibliographic formats for the exchange of bibliographic and related information in the machine-readable form between different types of computer systems were created more than 30 years ago. The evolution of information technologies leads to the improvement of computer systems. In addition to the development of computers and media types Internet has a great influence on data structure as well. Since the introduction of MARC bibliographic format, technology of data exchange between computers and between different computer systems has reached a very sophisticated stage and has contributed to the creation of new standards in this field. Today libraries work with this new infrastructure that induces many challenges. One of the most significant challenges is moving from a relatively homogenous bibliographic environment to a diverse one. Despite these challenges such changes are achievable and necessary to exploit possibilities of new metadata and technologies like the Internet and XML (Extensible Markup Language). XML is an open standard, a universal language for data on the Web. XML is nearly six-years-old standard designed for the description and computer-based management of (semi)-structured data and structured texts. XML gives developers the power to deliver structured data from a wide variety of applications and it is also an ideal format from server-to-server transfer of structured data. XML also isn't limited for Internet use and is an especially valuable tool in the field of library. In fact, XML's main strength - organizing information - makes it perfect for exchanging data between different systems. Tools that work with the XML can be used to process XML records without incurring additional costs associated with one's own software development. In addition, XML is also a suitable format for library web services. The Department of Computer-related Graphic Design and Library and Information Sciences of Debrecen University launched the BDML (Bibliographic Description Markup Language) development project in order to standardize bibliogrphic description with the help of XML.

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Abstract

A band of archivists and IT professionals at Harvard took on a project to convert nearly two million descriptions of archival collection components from marked-up text into the ArchivesSpace archival metadata management system. Starting in the mid-1990s, Harvard was an alpha implementer of EAD, an SGML (later XML) text markup language for electronic inventories, indexes, and finding aids that archivists use to wend their way through the sometimes quirky filing systems that bureaucracies establish for their records or the utter chaos in which some individuals keep their personal archives. These pathfinder documents, designed to cope with messy reality, can themselves be difficult to classify. Portions of them are rigorously structured, while other parts are narrative. Early documents predate the establishment of the standard; many feature idiosyncratic encoding that had been through several machine conversions, while others were freshly encoded and fairly consistent. In this paper, we will cover the practical and technical challenges involved in preparing a large (900MiB) corpus of XML for ingest into an open-source archival information system (ArchivesSpace). This case study will give an overview of the project, discuss problem discovery and problem solving, and address the technical challenges, analysis, solutions, and decisions and provide information on the tools produced and lessons learned. The authors of this piece are Kate Bowers, Collections Services Archivist for Metadata, Systems, and Standards at the Harvard University Archive, and Dave Mayo, a Digital Library Software Engineer for Harvard's Library and Technology Services. Kate was heavily involved in both metadata analysis and later problem solving, while Dave was the sole full-time developer assigned to the migration project.

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Date

30. 3.2003 11:06:22

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Abstract

RDF - the Resource Description Framework - is a foundation for processing metadata; it provides interoperability between applications that exchange machine-understandable information on the Web. RDF emphasizes facilities to enable automated processing of Web resources. RDF metadata can be used in a variety of application areas; for example: in resource discovery to provide better search engine capabilities; in cataloging for describing the content and content relationships available at a particular Web site, page, or digital library; by intelligent software agents to facilitate knowledge sharing and exchange; in content rating; in describing collections of pages that represent a single logical "document"; for describing intellectual property rights of Web pages, and in many others. RDF with digital signatures will be key to building the "Web of Trust" for electronic commerce, collaboration, and other applications. Metadata is "data about data" or specifically in the context of RDF "data describing web resources." The distinction between "data" and "metadata" is not an absolute one; it is a distinction created primarily by a particular application. Many times the same resource will be interpreted in both ways simultaneously. RDF encourages this view by using XML as the encoding syntax for the metadata. The resources being described by RDF are, in general, anything that can be named via a URI. The broad goal of RDF is to define a mechanism for describing resources that makes no assumptions about a particular application domain, nor defines the semantics of any application domain. The definition of the mechanism should be domain neutral, yet the mechanism should be suitable for describing information about any domain. This document introduces a model for representing RDF metadata and one syntax for expressing and transporting this metadata in a manner that maximizes the interoperability of independently developed web servers and clients. The syntax described in this document is best considered as a "serialization syntax" for the underlying RDF representation model. The serialization syntax is XML, XML being the W3C's work-in-progress to define a richer Web syntax for a variety of applications. RDF and XML are complementary; there will be alternate ways to represent the same RDF data model, some more suitable for direct human authoring. Future work may lead to including such alternatives in this document.

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Abstract

Seit dem 22. Februar 1999 ist das Resource Description Framework (RDF) als W3C-Empfehlung verfügbar. Doch was steckt hinter diesem Standard, der das Zeitalter des Semantischen Webs einläuten soll? Was RDF bedeutet, wozu man es einsetzt, welche Vorteile es gegenüber XML hat und wie man RDF anwendet, soll in diesem Artikel erläutert werden.

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Abstract

Although Learning XML covers XML with a broad brush, it nevertheless presents the key elements of the technology with enough detail to familiarise the reader with the crucial markup language. This guide is brief enough to tackle in a weekend. Author Erik T Ray begins with an excellent summary of XML's history as an outgrowth of SGML and HTML. He outlines very clearly the elements of markup, demystifying concepts such as attributes, entities and namespaces with numerous clear examples. To illustrate a real-world XML application, he gives the reader a look at a document written in DocBook--a publicly available XML document type for publishing technical writings--and explains the sections of the document step by step. A simplified version of DocBook is used later in the book to illustrate transformation--a powerful benefit of XML. The all-important Document Type Definition (DTD) is covered in depth, but the still-unofficial alternative--XML Schema--is only briefly addressed. The author makes liberal use of graphical illustrations, tables and code to demonstrate concepts along the way, keeping the reader engaged and on track. Ray also gets into a deep discussion of programming XML utilities with Perl. Learning XML is a highly readable introduction to XML for readers with existing knowledge of markup and Web technologies, and it meets its goals very well--to deliver a broad perspective of XML and its potential.

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Date

30. 3.2003 10:50:22

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Date

14. 8.2004 10:39:22

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Date

28. 1.2006 19:01:22

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Footnote

Rez. in: XML Magazin und Web Services 2003, H.1, S.14 (S. Meyen): "Seit dem 22. Februar 1999 ist das Resource Description Framework (RDF) als W3C-Empfehlung verfügbar. Doch was steckt hinter diesem Standard, der das Zeitalter des Semantischen Webs einläuten soll? Was RDF bedeutet, wozu man es einsetzt, welche Vorteile es gegenüber XML hat und wie man RDF anwendet, soll in diesem Artikel erläutert werden. Schlägt man das Buch auf und beginnt, im EinleitungsKapitel zu schmökern, fällt sogleich ins Auge, dass der Leser nicht mit Lektionen im Stile von "bei XML sind die spitzen Klammern ganz wichtig" belehrt wird, obgleich es sich um ein Buch für Anfänger handelt. Im Gegenteil: Es geht gleich zur Sache und eine gesunde Mischung an Vorkenntnissen wird vorausgesetzt. Wer sich heute für XML interessiert, der hat ja mit 99-prozentiger Wahrscheinlichkeit schon seine einschlägigen Erfahrungen mit HTML und dem Web gemacht und ist kein Newbie in dem Reich der spitzen Klammern und der (einigermaßen) wohlformatierten Dokumente. Und hier liegt eine deutliche Stärke des Werkes Helmut Vonhoegens, der seinen Einsteiger-Leser recht gut einzuschätzen weiß und ihn daher praxisnah und verständlich ans Thema heranführt. Das dritte Kapitel beschäftigt sich mit der Document Type Definition (DTD) und beschreibt deren Einsatzziele und Verwendungsweisen. Doch betont der Autor hier unablässig die Begrenztheit dieses Ansatzes, welche den Ruf nach einem neuen Konzept deutlich macht: XML Schema, welches er im folgenden Kapitel darstellt. Ein recht ausführliches Kapitel widmet sich dann dem relativ aktuellen XML Schema-Konzept und erläutert dessen Vorzüge gegenüber der DTD (Modellierung komplexer Datenstrukturen, Unterstützung zahlreicher Datentypen, Zeichenbegrenzungen u.v.m.). XML Schema legt, so erfährt der Leser, wie die alte DTD, das Vokabular und die zulässige Grammatik eines XML-Dokuments fest, ist aber seinerseits ebenfalls ein XML-Dokument und kann (bzw. sollte) wie jedes andere XML auf Wohlgeformtheit überprüft werden. Weitere Kapitel behandeln die Navigations-Standards XPath, XLink und XPointer, Transformationen mit XSLT und XSL und natürlich die XML-Programmierschnittstellen DOM und SAX. Dabei kommen verschiedene Implementierungen zum Einsatz und erfreulicherweise werden Microsoft-Ansätze auf der einen und Java/Apache-Projekte auf der anderen Seite in ungefähr vergleichbarem Umfang vorgestellt. Im letzten Kapitel schließlich behandelt Vonhoegen die obligatorischen Web Services ("Webdienste") als Anwendungsfall von XML und demonstriert ein kleines C#- und ASP-basiertes Beispiel (das Java-Äquivalent mit Apache Axis fehlt leider). "Einstieg in XML" präsentiert seinen Stoff in klar verständlicher Form und versteht es, seine Leser auf einem guten Niveau "abzuholen". Es bietet einen guten Überblick über die Grundlagen von XML und kann - zumindest derzeit noch - mit recht hoher Aktualität aufwarten."

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Date

22. 6.2005 15:12:11