-- 发布时间：3/21/2009 12:39:00 PM
-- 《A Semantic Web Primer》第二版 下载
Preface to the Second Edition
The reception of the first edition of this book showed that there was a real
need for a book with this profile. The book is in use in dozens of courses
worldwide and has been translated into Japanese, Spanish, Chinese and Korean.
The Semantic Web area has seen rapid development since the first publication
of our book. New elements have appeared in the Semantic Web language
stack, new application areas have emerged, and new tools are being
produced. This has prompted us to produce a second edition with a substantial
number of updates and changes. In brief, this second edition has the
following new elements:
■All known bugs and errata have been fixed (notably the RDF chapter
(chapter 3) contained some embarrassing errors).
■The RDF chapter now discusses SPARQL as the RDF query language
(with SPARQL going for W3C recommendation in the near future, and
already receiving widespread implementation support).
■The OWL chapter (chapter 4) now discusses OWL DLP, a newly identified
fragment of the language with a number of interesting practical and
theoretical properties.
■In the light of rapid developments in this area, the chapter on rules (chapter
5) has been revised and discusses the SWRL language as well as OWL
DLP.
■New example applications have been added to chapter 6.
■The discussion of web services in chapter 6 has been revised and is now
based on OWL-S.
■The final outlook chapter (chapter 8) has been entirely rewritten to reflect
the advancements in the state of the art, to capture a number of currently
ongoing discussions, and to list the most challenging issues facing the
Semantic Web.
We have also started to maintain a Web site with material to support the
use of this book: <http://www.semanticwebprimer.org>. The Web site contains
slides for each chapter, to be used for teaching, online versions of code
fragments in the book, and links to material for further reading.