The XML Example Document
XML °¸ÀýÎĵµ

We will use the "books.xml" document in the examples below (same XML file as in the previous chapters).
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View the "books.xml" file in your browser.
ÔÚÄãµÄä¯ÀÀÆ÷ÖÐä¯ÀÀ“books.xml”¡£

Present the Result In an HTML List
ÔÚHTMLÁбíÖÐÏÔʾ½á¹û

Look at the following XQuery FLWOR expression:
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for $x in doc("books.xml")/bookstore/book/title
order by $x
return $x

The expression above will select all the title elements under the book elements that are under the bookstore element, and return the title elements in alphabetical order.
ÉÏÊö±í´ïʽ»áÑ¡ÔñÔÚ bookstore ÔªËØÏ嵀 book ÔªËØÏÂËùÓÐ title ÔªËØ£¬²¢°´×Öĸ˳ÐòÅÅÁÐ title ÔªËغóÊä³ö¡£

Now we want to list all the book-titles in our bookstore in an HTML list. We add <ul> and <li> tags to the FLWOR expression:
ÏÖÔÚ£¬ÎÒÃÇÏ£ÍûÔÚ HTMLÁбíÖÐÁгö bookstore µÄËùÓÐbook-titlesÔªËØ£¬Òò´Ë£¬ÎÒÃÇÐèÒªÔÚ FLWOR ±í´ïʽÖмÓÈë<ul>ºÍ<li>±êÇ©£º

<ul>
{
for $x in doc("books.xml")/bookstore/book/title
order by $x
return <li>{$x}</li>

}
</ul>

The result of the above will be:
ÉÏÊöµÄ½á¹ûÏÔʾÈçÏ£º

<ul>
<li><title lang="en">Everyday Italian</title></li>
<li><title lang="en">Harry Potter</title></li>
<li><title lang="en">Learning XML</title></li>

<li><title lang="en">XQuery Kick Start</title></li>
</ul>

Now we want to eliminate the title element, and show only the data inside the title element:
ÏÖÔÚ£¬ÎÒÃÇÒª³ýÈ¥ title ÔªËØ£¬Ö»ÏÔʾ title ÔªËØÀïµÄÊý¾Ý£º

<ul>
{
for $x in doc("books.xml")/bookstore/book/title
order by $x
return <li>{data($x)}</li>

}
</ul>

The result will be (an HTML list):
½á¹û£¨Ò»·ÝHTMLÁÐ±í£©ÏÔʾÈçÏ£º

<ul>
<li>Everyday Italian</li>
<li>Harry Potter</li>
<li>Learning XML</li>
<li>XQuery Kick Start</li>

</ul>

XQuery FLWOR ±í´ïʽ XQuery ÊõÓï

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