Jukka K. Korpela

Unicode Explained (eBook, PDF)

• Format: PDF

Produktbeschreibung

Fundamentally, computers just deal with numbers. They store letters and other characters by assigning a number for each one. There are hundreds of different encoding systems for mapping characters to numbers, but Unicode promises a single mapping. Unicode enables a single software product or website to be targeted across multiple platforms, languages and countries without re-engineering. It's no wonder that industry giants like Apple, Hewlett-Packard, IBM andMicrosoft have all adopted Unicode.Containing everything you need to understand Unicode, this comprehensive reference from O'Reilly takes you on a detailed guide through the complex character world. For starters, it explains how to identify and classify characters - whether they're common, uncommon, or exotic. It then shows you how to type them, utilize their properties, and process character data in a robust manner. The book is broken up into three distinct parts. The first few chapters provide you with a tutorial presentation of Unicode and character data. It gives you a firm grasp of the terminology you need to reference various components, including character sets, fonts and encodings, glyphs and character repertoires.The middle section offers more detailed information about using Unicode and other character codes. It explains the principles and methods of defining character codes, describes some of the widely used codes, and presents code conversion techniques. It also discusses properties of characters, collation and sorting, line breaking rules and Unicode encodings. The final four chapters cover more advanced material, suchas programming to support Unicode.You simply can't afford to be without the nuggets of valuable information detailed in Unicode Explained.

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Produktdetails

• Verlag: O'Reilly Media
• Seitenzahl: 678
• Erscheinungstermin: 21. Juni 2006
• Englisch
• ISBN-13: 9780596153311
• Artikelnr.: 52928170

Autorenporträt

Jukka Korpela is a consultant who specializes in character codes, localization, orthography, usability, and accessibility. After graduating from Helsinki University of Technology, he taught these subjects in the university's Computer Science department and worked on localization and accessibility issues at TIEKE before becoming a full-time author and consultant. His previous books on CSS and XHTML were published in Finland by Docendo press.

Inhaltsangabe

Preface
Audience
Assumptions and Approach
Contents of This Book
Self-Assessment Test
Conventions Used in This Book
Using Code Examples
Safari® Enabled
How to Contact Us
Acknowledgments
Working with Characters
Chapter 1: Characters as Data
1.1 Introduction to Characters and Unicode
1.2 What's in a Character?
1.3 Variation of Writing Systems
1.4 Glyphs and Fonts
1.5 Definitions of Character Repertoires
1.6 Numbering Characters
1.7 Encoding Characters as Octet Sequences
1.8 Working with Encodings
1.9 Working with Fonts
1.10 Summaries
Chapter 2: Writing Characters
2.1 Method Varieties
2.2 Keyboard Variation and Settings
2.3 Virtual Keyboards
2.4 Program Commands
2.5 Character Maps
2.6 Replacements on the Fly
2.7 Special Techniques
2.8 Escape Sequences
2.9 Specialized Editors
2.10 Exercise
Chapter 3: Character Sets and Encodings
3.1 Good Old ASCII
3.2 ISO 8859 Codes
3.3 Windows Latin 1 and Other Windows Codes
3.4 Other 8-bit Codes
3.5 Unicode and UTF-8
3.6 Encodings for East Asian Language
3.7 Converters and Transcoding
3.8 Using Character Codes
A Systematic Look at Unicode
Chapter 4: The Structure of Unicode
4.1 Design Principles
4.2 Versions of Unicode
4.3 Coding Space
4.4 Unicode Terms
4.5 Guide to the Unicode Standard
4.6 Unicode and Fonts
4.7 Criticism of Unicode
4.8 Questions and Answers
Chapter 5: Properties of Characters
5.1 Character Classification
5.2 An Overview of Properties
5.3 Compositions and Decompositions
5.4 Normalization
5.5 Case Properties
5.6 Collation and Sorting
5.7 Text Boundaries
5.8 Directionality
5.9 Line-Breaking Properties
5.10 Unicode Conformance Requirements
5.11 Effects on Choosing Characters
Chapter 6: Unicode Encodings
6.1 Unicode Encodings in General
6.2 UTF-32 and UCS-4
6.3 UTF-16 and UCS-2
6.4 UTF-8
6.5 Byte Order
6.6 Conversions Between Unicode Encodings
6.7 Other Encodings
6.8 Auto-Detecting the Encoding
6.9 Choosing an Encoding
Advanced Unicode Topics
Chapter 7: Characters and Languages
7.1 Writing Systems and IT
7.2 Character Requirements of Languages
7.3 Transliteration and Transcription
7.4 Language Metadata
7.5 Languages and Fonts
Chapter 8: Character Usage
8.1 Basics of Character Usage
8.2 ASCII (Basic Latin)
8.3 Latin-1 Supplement (ISO 8859-1)
8.4 Other Latin Letters
8.5 Other European Alphabetic Scripts
8.6 Diacritic Marks
8.7 Letterlike Symbols
8.8 General Punctuation
8.9 Line Structure Control
8.10 Mathematical and Technical Symbols
8.11 Other Blocks
Chapter 9: The Character Level and Above
9.1 Levels of Text Representation and Processing
9.2 Characters and Markup
9.3 Media Types for Text
Chapter 10: Characters in Internet Protocols
10.1 Information About Encoding
10.2 Characters in MIME
10.3 Content Negotiation and Multilingual Sites
10.4 Characters in Protocol Headers
10.5 Characters in Domain Names and URLs
Chapter 11: Characters in Programming
11.1 Characters in Computer Languages
11.2 Character and String Data
11.3 The Preparedness Principle
11.4 Character Input and Output
11.5 Processing Form Data
11.6 Identifiers, Patterns, and Regular Expressions
11.7 International Components for Unicode (ICU)
11.8 Using Locales
Tables for Writing Characters
Additional Notes
Colophon

Rezensionen

"Im vorliegenden Titel dreht sich alles um Zeichen. Wenn man es mit verschiedenen Charactersets zu tun bekommt oder mehr über Zeichensätze im Allgemeinen - und Unicode im Besonderen - wissen will, sollte man es zurate ziehen. [...] Ein wichtiges Buch für Entwickler mehrsprachiger Software/Websites." -- iX, Ausgabe 2/2007