📄 schema_simple.asp
字号:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html lang="en-US" xml:lang="en-US" xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>XML Schema Simple Elements</title>
<link rel="shortcut icon" href="../favicon.ico" type="image/x-icon" />
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<meta name="Keywords" content="xml,tutorial,html,dhtml,css,xsl,xhtml,javascript,asp,ado,vbscript,dom,sql,colors,soap,php,authoring,programming,training,learning,beginner's guide,primer,lessons,school,howto,reference,examples,samples,source code,tags,demos,tips,links,FAQ,tag list,forms,frames,color table,w3c,cascading style sheets,active server pages,dynamic html,internet,database,development,Web building,Webmaster,html guide" />
<meta name="Description" content="Free HTML XHTML CSS JavaScript DHTML XML DOM XSL XSLT RSS AJAX ASP ADO PHP SQL tutorials, references, examples for web building." />
<meta http-equiv="pragma" content="no-cache" />
<meta http-equiv="cache-control" content="no-cache" />
<link rel="stylesheet" type="text/css" href="../stdtheme.css" />
<script type="text/javascript">
var gaJsHost = (("https:" == document.location.protocol) ? "../../https@ssl./default.htm" : "../../www./default.htm");
document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>
<script type="text/javascript">
var pageTracker = _gat._getTracker("UA-3855518-1");
pageTracker._initData();
pageTracker._trackPageview();
</script>
</head>
<body>
<a name="top"></a>
<table cellpadding="0" cellspacing="0" width="100%" bgcolor="#808080">
<tr>
<td width="234" valign="top">
<a href="../default.htm"><img src="../images/w3default80.jpg" border="0" alt="W3Schools" /></a>
</td>
<th valign="middle" align="left" class="right">
<iframe style="background-color:#808080" src="../banners/bannerframe.asp@adpartner=xmlspy" height="90" width="728"
marginwidth="0" marginheight="0" frameborder="0" scrolling="no">
Your browser does not support inline frames or is currently configured not to display inline frames.
</iframe>
<br /></th>
</tr>
</table>
<table style="margin-left:1px" width="800px" border="0" cellpadding="0" cellspacing="2">
<tr>
<td width="137" class="content" valign="top"><br />
<a class="left" href="../default.asp" target="_top">
<img src="../images/homeicon.gif" border="0" alt="home" /></a>
<a class="left" href="../default.asp" target="_top">
<b>HOME</b></a>
<br /><br />
<b>Schema Tutorial</b><br />
<a class="left" target="_top" href="default.asp" >XSD HOME</a><br />
<a class="left" target="_top" href="schema_intro.asp" >XSD Intro</a><br />
<a class="left" target="_top" href="schema_why.asp" >XSD Why Use</a><br />
<a class="left" target="_top" href="schema_howto.asp" >XSD How To</a><br />
<a class="left" target="_top" href="schema_schema.asp" >XSD <schema></a><br />
<br />
<b>Simple Types</b><br />
<a class="left" target="_top" href="schema_simple.asp" style='font-weight:bold;'>XSD Elements</a><br />
<a class="left" target="_top" href="schema_simple_attributes.asp" >XSD Attributes</a><br />
<a class="left" target="_top" href="schema_facets.asp" >XSD Restrictions</a><br />
<br />
<b>Complex Types</b><br />
<a class="left" target="_top" href="schema_complex.asp" >XSD Elements</a><br />
<a class="left" target="_top" href="schema_complex_empty.asp" >XSD Empty</a><br />
<a class="left" target="_top" href="schema_complex_elements.asp" >XSD Elements Only</a><br />
<a class="left" target="_top" href="schema_complex_text.asp" >XSD Text Only</a><br />
<a class="left" target="_top" href="schema_complex_mixed.asp" >XSD Mixed</a><br />
<a class="left" target="_top" href="schema_complex_indicators.asp" >XSD Indicators</a><br />
<a class="left" target="_top" href="schema_complex_any.asp" >XSD <any></a><br />
<a class="left" target="_top" href="schema_complex_anyattribute.asp" >XSD <anyAttribute></a><br />
<a class="left" target="_top" href="schema_complex_subst.asp" >XSD Substitution</a><br />
<a class="left" target="_top" href="schema_example.asp" >XSD Example</a><br />
<br />
<b>Data Types</b><br />
<a class="left" target="_top" href="schema_dtypes_string.asp" >XSD String</a><br />
<a class="left" target="_top" href="schema_dtypes_date.asp" >XSD Date</a><br />
<a class="left" target="_top" href="schema_dtypes_numeric.asp" >XSD Numeric</a><br />
<a class="left" target="_top" href="schema_dtypes_misc.asp" >XSD Misc</a><br />
<br />
<a class="left" target="_top" href="schema_summary.asp" >XSD Summary</a><br />
<br />
<b>References</b><br />
<a class="left" target="_top" href="schema_elements_ref.asp" >XSD Reference</a><br />
<a class="left" target="_blank" href="../../www.w3.org/2001/03/webdata/xsv">XSD Validator</a><br /><br />
<b>Selected Reading</b><br />
<a class="left" target="_top" href="../browsers/browsers_stats.asp">Web Statistics</a><br />
<a class="left" target="_top" href="../site/site_glossary.asp">Web Glossary</a><br />
<a class="left" target="_top" href="../hosting/default.asp">Web Hosting</a><br />
<a class="left" target="_top" href="../quality/default.asp">Web Quality</a><br /><br />
<a class="left" target="_top" href="../forum/default.asp">W3Schools Forum</a><br /><br />
<a class="left" target="_top" href="../about/about_helping.asp">Helping W3Schools</a><br /><br />
<script type="text/javascript"><!--
google_ad_client = "pub-3440800076797949";
/*LeftLinkUnit*/
google_ad_slot = "4854527104";
google_ad_width = 120;
google_ad_height = 90;
//-->
</script>
<script type="text/javascript"
src="../../pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</td>
<td valign="top">
<table style="border: 1px solid gray" width="100%" bgcolor="#FFFFFF" border="0" cellpadding="5" cellspacing="0">
<tr>
<td>
<h1>XSD Simple Elements</h1>
<a href="schema_schema.asp"><img border="0" src="../images/btn_previous.gif" alt="prev" /></a>
<a href="schema_simple_attributes.asp"><img border="0" src="../images/btn_next.gif" alt="next" /></a>
<hr />
<p class="intro">XML Schemas define the elements of your XML files.</p>
<p class="intro">A simple element is an XML element that contains only text.
It cannot contain any other elements or attributes.</p>
<hr />
<h2>What is a Simple Element?</h2>
<p>A simple element is an XML element that can contain only text. It cannot
contain any other elements or attributes.</p>
<p>However, the "only text" restriction is quite misleading. The text
can be of many different types. It can be one of the types included in
the XML Schema definition (boolean, string, date, etc.), or it can be a custom type that you can define
yourself.</p>
<p>You can also add restrictions (facets) to a data type in order to
limit its content, or you can require the data to match a specific pattern.</p>
<hr />
<h2>Defining a Simple Element</h2>
<p>The syntax for defining a simple element is: </p>
<table width="100%" border="1" class="ex" cellspacing="0">
<tr>
<td>
<pre><xs:element name="xxx" type="yyy"/></pre>
</td>
</tr>
</table>
<br />
where xxx is the name of the element and yyy is the data type of the element.<p>XML Schema has a lot of built-in data types. The most
common types are:</p>
<ul>
<li>xs:string</li>
<li>xs:decimal</li>
<li>xs:integer</li>
<li>xs:boolean</li>
<li>xs:date</li>
<li>xs:time</li>
</ul>
<h3>Example</h3>
<p>Here are some XML elements:</p>
<table width="100%" border="1" class="ex" cellspacing="0">
<tr>
<td>
<pre><lastname>Refsnes</lastname>
<age>36</age>
<dateborn>1970-03-27</dateborn></pre>
</td>
</tr>
</table>
<p>And here are the corresponding simple element definitions:</p>
<table width="100%" border="1" class="ex" cellspacing="0">
<tr>
<td>
<pre><xs:element name="lastname" type="xs:string"/>
<xs:element name="age" type="xs:integer"/>
<xs:element name="dateborn" type="xs:date"/> </pre>
</td>
</tr>
</table>
<br />
<hr />
<h2>Default and Fixed Values for Simple Elements</h2>
<p>Simple elements may have a default value OR a fixed value specified.</p>
<p>A default value is automatically assigned to the element when no other value
is specified.</p>
<p>In the following example the default value is "red":</p>
<table width="100%" border="1" class="ex" cellspacing="0">
<tr>
<td>
<pre><xs:element name="color" type="xs:string" default="red"/></pre>
</td>
</tr>
</table>
<p><span class="834132720-09042002"><strong style="font-weight: 400">A fixed
value is also automatically assigned to the element, and you cannot specify
another value</strong></span>.</p>
<p>In the following example the fixed value is "red":</p>
<table width="100%" border="1" class="ex" cellspacing="0">
<tr>
<td>
<pre><xs:element name="color" type="xs:string" fixed="red"/></pre>
</td>
</tr>
</table>
<br />
<hr />
<a href="schema_schema.asp"><img border="0" src="../images/btn_previous.gif" alt="prev" /></a>
<a href="schema_simple_attributes.asp"><img border="0" src="../images/btn_next.gif" alt="next" width="100" height="20" /></a>
<br />
<hr />
<!-- **** SPOTLIGHTS 1 **** -->
<iframe src="../banners/aspallframe.asp" height="110" width="485"
marginwidth="0" marginheight="0" frameborder="0" scrolling="no">
Your browser does not support inline frames or is currently configured not to display inline frames.
</iframe>
<hr />
<!-- **** SPOTLIGHTS 2 **** -->
<h2>Want To Be A Web Master?</h2>
<p>If you want to be a Web Master, you will have to host your web site with an ISP (Internet Service Provider).</p>
<p>MaximumASP offers seven different configurations of dedicated servers to meet your Windows and .NET hosting needs.
Hosted on our multi-tiered Enterprise Class network, these servers provide the performance, security and reliability
you need to host your high end web sites and applications.
</p>
<p><a target="_blank" href="../../www.maximumasp.com/about/specials.aspx">Visit MaximumASP</a></p>
<hr />
<!-- **** SPOTLIGHTS 3 **** -->
<table cellpadding="0" cellspacing="0"><tr><td width="72"></td><td>
<script type="text/javascript"><!--
google_ad_client = "pub-3440800076797949";
/*txt*/
google_ad_slot = "1699448869";
google_ad_width = 336;
google_ad_height = 280;
//-->
</script>
<script type="text/javascript"
src="../../pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</td></tr></table>
<hr />
<center>
<script type="text/javascript"><!--
google_ad_client = "pub-3440800076797949";
/*imgtxt*/
google_ad_slot = "8606855891";
google_ad_width = 468;
google_ad_height = 60;
//-->
</script>
<script type="text/javascript"
src="../../pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</center>
<hr />
<!-- **** END SPOTLIGHTS **** -->
</td></tr>
<tr><td>
<p>Jump to: <a href="#top" target="_top"><b>Top of Page</b></a>
or <a href="../default.asp" target="_top"><b>HOME</b></a> or
<a href='schema_simple.asp@output=print' target="_blank">
<img src="../images/print.gif" alt="Printer Friendly" border="0" />
<b>Printer friendly page</b></a></p>
<p>W3Schools provides material for training only. We do not warrant the correctness of its contents.
The risk from using it lies entirely with the user.
While using this site, you agree to have read and accepted our
<a href="../about/about_copyright.asp">terms of use</a> and
<a href="../about/about_privacy.asp">privacy policy</a>.
</p>
<p><a href="../about/about_copyright.asp">Copyright 1999-2008</a> by Refsnes Data. All Rights Reserved.</p>
<table border="0" width="100%" cellspacing="0" cellpadding="0"><tr>
<td width="60%" align="left">
<a href="../../validator.w3.org/check@uri=referer" target="_blank">
<img src="../images/vxhtml.gif" alt="Validate" width="88" height="31" border="0" /></a>
<a href="../../jigsaw.w3.org/css-validator/check@uri=referer" target="_blank">
<img src="../images/vcss.gif" alt="Validate" width="88" height="31" border="0" /></a>
<a href="../../www.w3.org/WAI/WCAG1A-Conformance" title="Explanation of Level A Conformance" target="_blank">
<img src="../images/wai.gif" alt="W3C-WAI level A conformance icon" width="88" height="31" border="0" /></a>
</td>
<td>
<a href="../xhtml/xhtml_howto.asp" target="_top">W3Schools was converted to XHTML in December 1999</a>
</td></tr>
</table>
</td></tr>
</table>
</td>
<td width="145" align="center" valign="top">
<iframe style="background-color:#f1f1f1" src="../banners/rightcolumn.asp@secid=schema" height="1500" width="147"
marginwidth="0" marginheight="0" frameborder="0" scrolling="no">
</iframe>
</td>
</tr></table>
</body>
</html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -