G.8. meta Elements

Search engines are used to find Web sites. They usually catalog sites by following links from page to page (known as spidering or crawling) and saving identification and classification information for each page. One way that search engines catalog pages is by reading the content in each page's meta elements, which specify information about a document.

Two important attributes of the meta element are name, which identifies the type of meta element, and content, which provides the information search engines use to catalog pages. Figure G.8 introduces the meta element.

Figure G.8. meta tags provide keywords and a description of a page.

 1  "1.0"?>
 2  "-//W3C//DTD XHTML 1.1//EN"
 3 "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
 4
 5 
 6 
 7
 8 
"http://www.w3.org/1999/xhtml"> 9 10 Internet and WWW How to Program - Welcome 11 12 13 14 "keywords" content = "Web page, design, 15 XHTML, tutorial, personal, help, index, form, 16 contact, feedback, list, links, frame, deitel" /> 17 18 "description" content = "This Web site will 19 help you learn the basics of XHTML and Web page design 20 through the use of interactive examples and 21 instruction." /> 22 23 24 25 26 27

Welcome to Our Web Site!

28 29

We have designed this site to teach about the wonders 30 of XHTML. XHTML is 31 better equipped than HTML to represent complex 32 data on the Internet. XHTML takes advantage of 33 XML's strict syntax to ensure well-formedness. Soon you 34 will know about many of the great new features of 35 XHTML.

36 37

Have Fun With the Site!

38 39 40

Lines 1416 demonstrate a "keywords" meta element. The content attribute of such a meta element provides search engines with a list of words that describe a page. These words are compared with words in search requests. Thus, including meta elements and their content information can draw more viewers to your site.

Lines 1821 demonstrate a "description" meta element. The content attribute of such a meta element provides a three- to four-line description of a site, written in sentence form. Search engines also use this description to catalog your site and sometimes display this information as part of the search results.

Software Engineering Observation G 1

meta elements are not visible to users and must be placed inside the head section of your XHTML document. If meta elements are not placed in this section, they will not be read by search engines.


Preface

Index

    Introduction to Computers, the Internet and Visual C#

    Introduction to the Visual C# 2005 Express Edition IDE

    Introduction to C# Applications

    Introduction to Classes and Objects

    Control Statements: Part 1

    Control Statements: Part 2

    Methods: A Deeper Look

    Arrays

    Classes and Objects: A Deeper Look

    Object-Oriented Programming: Inheritance

    Polymorphism, Interfaces & Operator Overloading

    Exception Handling

    Graphical User Interface Concepts: Part 1

    Graphical User Interface Concepts: Part 2

    Multithreading

    Strings, Characters and Regular Expressions

    Graphics and Multimedia

    Files and Streams

    Extensible Markup Language (XML)

    Database, SQL and ADO.NET

    ASP.NET 2.0, Web Forms and Web Controls

    Web Services

    Networking: Streams-Based Sockets and Datagrams

    Searching and Sorting

    Data Structures

    Generics

    Collections

    Appendix A. Operator Precedence Chart

    Appendix B. Number Systems

    Appendix C. Using the Visual Studio 2005 Debugger

    Appendix D. ASCII Character Set

    Appendix E. Unicode®

    Appendix F. Introduction to XHTML: Part 1

    Appendix G. Introduction to XHTML: Part 2

    Appendix H. HTML/XHTML Special Characters

    Appendix I. HTML/XHTML Colors

    Appendix J. ATM Case Study Code

    Appendix K. UML 2: Additional Diagram Types

    Appendix L. Simple Types

    Index



    Visual C# How to Program
    Visual C# 2005 How to Program (2nd Edition)
    ISBN: 0131525239
    EAN: 2147483647
    Year: 2004
    Pages: 600

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