Archive for February, 2008

1460 Introduction to XHTML: Part (Web site) 2 Appendix L

Friday, February 29th, 2008

1460 Introduction to XHTML: Part 2 Appendix L The foot section (lines 58 63) is defined with a tfoot (table foot) element and represents a footer. Text commonly placed in the footer includes calculation results and footnotes. Like other sections, the foot section can contain table rows and each row can contain columns. L.3 Intermediate XHTML Tables and Formatting In the previous section, we explored the structure of a basic table. In Fig. L.2, we enhance our discussion of tables by introducing elements and attributes that allow the document author to build more complex tables. The table begins on line 17. Element colgroup (lines 22 27) groups and formats columns. The col element (line 26) specifies two attributes in this example. The align attribute determines the alignment of text in the column. The span attribute determines how many columns the col element formats. In this case, we set align s value to “right”and span s value to “1″to right-align text in the first column (the column containing the picture of the camel in the sample screen capture). Table cells are sized to fit the data they contain. Document authors can create larger data cells by using attributes rowspan and colspan. The values assigned to these attributes specify the number of rows or columns occupied by a cell. The th element at lines 36 39 uses the attribute rowspan=”2″ to allow the cell containing the picture of the camel to use two vertically adjacent cells (thus the cell spans two rows). The thelement at lines 42 45 uses the attribute colspan=”4″to widen the header cell (containing Camelidcomparisonand Approximateasof9/2002) to span four cells. 1 2 4 5 6 7 8 9 10 11 12 13 14 15

Table Example Page

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Here is a more complex sample table. Price of Fruit
Price
$0.25
Orange $0.50
Banana $1.00
Pineapple $2.00
Total $3.75

Fig. L.1 FiFiFig.g.g. LLLL….111Fig. XHTML table. (Part 2 of 3.)
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Cpanel web hosting - Appendix L Introduction to XHTML: Part 2 1457

Tuesday, February 26th, 2008

Appendix L Introduction to XHTML: Part 2 1457 Outline L.1 Introduction L.2 Basic XHTML Tables L.3 Intermediate XHTML Tables and Formatting L.4 Basic XHTML Forms L.5 More Complex XHTML Forms L.6 Internal Linking L.7 Creating and Using Image Maps K.8 metaElements K.9 framesetElement K.10 Nested framesets L.11 Internet and World Wide Web Resources Summary Terminology Self-Review Exercises Answers to Self-Review Exercises Exercises L.1 Introduction In the previous appendix, we introduced XHTML. We built several complete Web pages featuring text, hyperlinks, images, horizontal rules and line breaks. In this appendix, we discuss more substantial XHTML features, including presentation of information in tables and incorporating forms for collecting information from a Web-page visitor. We also introduce internal linking and image maps for enhancing Web-page navigation and frames for displaying multiple documents in the browser. By the end of this appendix, you will be familiar with the most commonly used XHTML features and will be able to create more complex Web documents. In this appendix, we do not present any C# programming. L.2 Basic XHTML Tables This section presents the XHTML table a frequently used feature that organizes data into rows and columns. Our first example (Fig. L.1) uses a table with six rows and two columns to display price information for fruit. 1 2 4 5 6 7 8 9 10 11 12 Fig. L.1 Fig. L.Fig..Fi L1g. L.1L.1XHTML table. (Part 1 of 3.) Fig.
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L Introduction to XHTML: Part 2 Objectives (Top web site)

Monday, February 25th, 2008

L Introduction to XHTML: Part 2 Objectives To be able to create tables with rows and columns of data. To be able to control table formatting. To be able to create and use forms. To be able to create and use image maps to aid in Web-page navigation. To be able to make Web pages accessible to search engines through tags. To be able to use the frameset element to display multiple Web pages in a single browser window. Yea, from the table of my memory I ll wipe away all trivial fond records. William Shakespeare
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Web server certificate - Appendix K Introduction to XHTML: Part 1 1455

Monday, February 25th, 2008

Appendix K Introduction to XHTML: Part 1 1455 K.14 Identify each of the following as either an element or an attribute: a) html b) width c) href d) br e) h3 f) a g) src K.15 State which of the following statements are true and which are false. If false, explain why. a) A valid XHTML document can contain uppercase letters in element names. b) Tags need not be closed in a valid XHTML document. c) XHTML documents can have the file extension .htm. d) Valid XHTML documents can contain tags that overlap. e) &less; is the special character for the less-than (<) character. f) In a valid XHTML document,

  • can be nested inside either
      or
        tags. K.16 Fill in the blanks for each of the following statements: a) XHTML comments begin with (XHTML comment)
      • (list item) tag a element ( ) linked document alt attribute mailto: URL &(& special character) markup language anchor nested list angle brackets (<>) ol(ordered list) element attribute p (paragraph) element body element special character br (line break) element src attribute (img) comments in XHTML tag ©( special character) sub element disc subscript element superscript e-mail anchor syntax empty tag tag Extensible Hypertext Markup Language text editor (XHTML) title element head element type attribute header unordered list element (ul) header elements (h1 through h6) valid document height attribute Web page hexadecimal code width attribute
        tag (horizontal rule) World Wide Web (WWW) href attribute XHTML (Extensible Hypertext .htm (XHTML file-name extension) Markup Language) tag XHTML comment .html(XHTML file-name extension) XHTML markup hyperlink XHTML tag image hyperlink XML declaration img element xmlns attribute level of nesting SELF-REVIEW EXERCISES K.1 State whether the following statements are true or false. If false, explain why. a) Attribute type, when used with an olelement, specifies a sequence type. b) An ordered list cannot be nested inside an unordered list. c) XHTML is an acronym for XML HTML. d) Element brrepresents a line break. e) Hyperlinks are marked up with
        tags. K.2 Fill in the blanks in each of the following statements: a) The element inserts a horizontal rule. b) A superscript is marked up with element and a subscript is marked up with element . c) The least important header element is and the most important header element is . d) Element marks up an unordered list. e) Element marks up a paragraph.
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  • Affordable web design - 1452 Introduction to XHTML: Part 1 Appendix K

    Friday, February 22nd, 2008

    1452 Introduction to XHTML: Part 1 Appendix K Validation services (e.g., validator.w3.org) ensure that an XHTML document is syntactically correct. Every XHTML document contains a start tag and an end tag. Comments in XHTML always begin with . The browser ignores all text inside a comment. Every XHTML document has a headelement, which generally contains information, such as a title, and a bodyelement, which contains the page content. Information in the head element generally is not rendered in the display window, but it may be made available to the user through other means. The title element names a Web page. The title usually appears in the colored bar (called the title bar) at the top of the browser window and also appears as the text identifying a page when users add your page to their list of Favorites or Bookmarks. The body of an XHTML document is the area in which the document s content is placed. The content may include text and tags. All text placed between the

    and

    tags forms one paragraph. XHTML provides six headers (h1 through h6) for specifying the relative importance of information. Header element h1 is considered the most significant header and is rendered in a larger font than the other five headers. Each successive header element (i.e., h2, h3, etc.) is rendered in a smaller font. Web browsers typically underline text hyperlinks and color them blue by default. The tag renders text in a bold font. Users can insert links with the a(anchor) element. The most important attribute for the a element is href, which specifies the resource (e.g., page, file or e-mail address) being linked. Anchors can link to an e-mail address, using a mailto URL. When someone clicks this type of anchored link, most browsers launch the default e-mail program (e.g., Outlook Express) to initiate an e-mail message to the linked address. The img element s src attribute specifies an image s location. Optional attributes width and height specify the image width and height, respectively. Images are measured in pixels ( picture elements ), which represent dots of color on the screen. Every img element in a valid XHTML document must have an altattribute, which contains text that is displayed if the client cannot render the image. The alt attribute makes Web pages more accessible to users with disabilities, especially those with vision impairments. Some XHTML elements are empty elements, contain only attributes and do not mark up text. Empty elements (e.g., img) must be terminated, either by using the forward slash character (/) or by explicitly writing an end tag. The br element causes most browsers to render a line break. Any markup or text following a br element is rendered on the next line. XHTML provides special characters or entity references (in the form &code;) for representing characters that cannot be marked up. Most browsers render a horizontal rule, indicated by the


    tag, as a horizontal line. The hr element also inserts a line break above and below the horizontal line. The unordered list element ulcreates a list in which each item in the list begins with a bullet symbol (called a disc). Each entry in an unordered list is an li (list item) element. Most Web browsers render these elements with a line break and a bullet symbol at the beginning of the line. Lists may be nested to represent hierarchical data relationships. Attribute type specifies the sequence type (i.e., the set of numbers or letters used in the ordered list).
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    Appendix K Introduction to XHTML: Part 1 1451

    Thursday, February 21st, 2008

    Appendix K Introduction to XHTML: Part 1 1451 ment is valid. There are other XHTML document types as well. This particular example uses the XHTML transitional document type. This document type exists to enable XHTML document creators to use legacy HTML technologies in an XHTML document. In this example, the type attribute of the ol element (lines 33 and 47) is a legacy HTML technology. Changing lines 2 3 as shown in this example, enables us to demonstrate ordered lists with different numbering formats. Normally, such formatting is specified with style sheets. Most examples in this book adhere to strict HTML form. Testing and Debugging Tip K.2 Most current browsers still attempt to render XHTML documents, even if they are invalid. K.11 Internet and World Wide Web Resources www.w3.org/TR/xhtml1 The XHTML 1.0 Recommendation contains XHTML 1.0 general information, compatibility issues, document type definition information, definitions, terminology and much more. www.xhtml.org XHTML.org provides XHTML development news and links to other XHTML resources, which include books and articles. www.w3schools.com/xhtml/default.asp The XHTML School provides XHTML quizzes and references. This page also contains links to XHT- ML syntax, validation and document type definitions. validator.w3.org This is the W3C XHTML validation service site. hotwired.lycos.com/webmonkey/00/50/index2a.html This site provides an article about XHTML. Key sections of the article overview XHTML and discuss tags, attributes and anchors. wdvl.com/Authoring/Languages/XML/XHTML The Web Developers Virtual Library provides an introduction to XHTML. This site also contains articles, examples and links to other technologies. www.w3.org/TR/1999/xhtml-modularization-19990406/DTD/doc The XHTML 1.0 DTD documentation site provides links to DTD documentation for the strict, transitional and frameset document type definitions. SUMMARY XHTML (Extensible Hypertext Markup Language) is a markup language for creating Web pages. A key issue when using XHTML is the separation of the presentation of a document (i.e., the document s appearance when rendered by a browser) from the structure of the information in the document. In XHTML, text is marked up with elements, delimited by tags that are names contained in pairs of angle brackets. Some elements may contain additional markup called attributes, which provide additional information about the element. A machine that runs specialized piece of software called a Web server stores XHTML documents. XHTML documents that are syntactically correct are guaranteed to render properly. XHTML documents that contain syntax errors may not display properly.
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