Transcript
Page 1: Authoring Languages and Web Authoring Software

Authoring Languages and Web Authoring Software

4.01 Examine web page development and design.

Page 2: Authoring Languages and Web Authoring Software

Authoring Languages

Used to control the appearance and functionality of web pages when displayed in a browser Examples include:

HTML (HyperText Markup Language) XML (eXtensible Markup Language) XHTML (eXtensible HTML) Java Applets

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HTML

HyperText Markup Language

First and still primary language for developing web pages/sites

Uses codes, or tags, to instruct the browser how to display text and images

Treats all data the same—for display only

Example of HTML code<html>

<title>Student Website</title>

<b>Welcome to my website!</b>

</html>

Page 4: Authoring Languages and Web Authoring Software

XML

eXtensible Markup Language

Describes data types to facilitate data processing

Designed to carry data, not to display it Uses author-defined tags to

identify each data entry so that the data can be easily imported into other applications

Metadata—data about data

Example of XML code<weather>

<city>Atlanta</city>

<state>Georgia</state>

<temp>75</temp>

</weather>

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XHTMLeXtensible HyperText Markup Language Combination of HTML and XML

Allows designer to mix HTML and XML so that browsers can display and manage data correctly

Aimed to replace HTML as dominant authoring language

Places restrictions on HTML tags so that code is cleaner and can display data as author intended

Requires all HTML tag sets be closed

Requires lowercase tags

Many devices can’t interpret bad HTML code (mobile phones, PDAs)

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Java Applets

Short programs written in Java code Added to basic HTML and XHTML Add multimedia, animation, gaming, and

other interactive elements to add interest to the page

http://java.sun.com/applets/

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Presentation and Scripting Languages

CSS (Cascading Style Sheets) JavaScript

Page 8: Authoring Languages and Web Authoring Software

CSSCascading Style Sheets

Separates content from appearance and gives web authors more control over layout and page format

CSS code instructs the Web browser how to format each item.

<html>

<head>

<style type="text/css">

h1 {color: #00ff00}

h2 {color: #dda0dd}

p {color: rgb(0,0,255)}

</style>

</head>

<body>

<h1>This is header 1</h1>

<h2>This is header 2</h2>

<p>This is a paragraph</p>

</body>

</html>

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Pros and Cons of CSS

Advantages One style sheet can control

the formatting for multiple web pages. An entire web site can be reformatted by editing one CSS file.

Styles can also be set internally. The CSS is in the header of the html document.

Disadvantage May alter the ability of

some devices to accurately read and display information.

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JavaScript An object based scripting

language that allows creation and execution procedures within a web page

Does not require plug-ins (additional programs for the user to install)

Widely supported by most browsers

JavaScript example displays this dialog box in the browser window:

<html><head><title>JavaScript Example</title><script type="text/JavaScript">var foo="Greetings, visitor!"alert(foo);</script></head><body></body></html>

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Web Authoring Software

There are several web authoring software solutions available for authoring and managing web sites. Two major solutions are Microsoft Expression Web2 and Adobe Dreamweaver CS4.

Web site hosts also provide proprietary web software authoring solutions for managing their sites.

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Web Authoring Software

Microsoft Expression Web2 (replaces Microsoft FrontPage)

http://www.microsoft.com/expression/products/Overview.aspx?key=web

Adobe Dreamweaver CS4

http://www.adobe.com/products/dreamweaver/


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