Page 113 - Electronic Commerce
P. 113
Chapter 2
themselves, such as prices, identification numbers, and quantities on hand, are marked up
with XML tags. The XML document is embedded within the HTML document.
88 XML includes data-management capabilities that HTML cannot provide. To better
understand the strengths of XML and weaknesses of HTML in data-management tasks,
consider the simple example of a Web page that includes a list of countries and some
basic facts about each country. A Web designer might decide to use HTML tags to show
each fact the same way for each country. Each fact would use a different tag. Assume that
the Web designer in this case decided to use the HTML heading tags to present the data.
Figure 2-10 shows the data and the HTML heading tags for four countries (this is only an
example; the actual list would include more than 150 countries). The first item in the list
provides the definitions for each tag. Figure 2-11 (on the next page) shows this HTML
document as it appears in a Web browser.
<html>
<head>
<title>Countries</title>
</head>
<body>
<h1>Countries</h1>
<h2>CountryName</h2>
<h3>CapitalCity</h3>
<h4>AreaInSquareKilometers</h4>
<h5>OfficialLanguage</h5>
<h6>VotingAge</h6>
<h2>Argentina</h2>
<h3>Buenos Aires</h3>
<h4>2,766,890</h4>
<h5>Spanish</h5>
<h6>18</h6>
<h2>Austria</h2>
<h3>Vienna</h3>
<h4>83,858</h4>
<h5>German</h5>
<h6>19</h6>
<h2>Barbados</h2>
<h3>Bridgetown</h3>
<h4>430</h4>
<h5>English</h5>
<h6>18</h6>
<h2>Belarus</h2>
<h3>Minsk</h3> Learning
<h4>207,600</h4>
<h5>Byelorussian</h5>
<h6>18</h6> Cengage
</body>
2015
</html> ©
FIGURE 2-10 Country list data marked up with HTML tags
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