Books.xml:
<!--?xml version="1.0" encoding="UTF-8"?-->
<bookstore>
<book category="Child">
<title lang="en">ABC</title>
<author>Author Name</author>
<year>2020</year>
<price>100.00</price>
</book>
<book category="IT">
<title lang="en">XQuery Book</title>
<author>Author 1</author>
<author>Author 2</author>
<year>2005</year>
<price>300.00</price>
</book>
<book category="Sociology">
<title lang="en">Sociology 1</title>
<author>Author Name</author>
<year>2010</year>
<price>250.00</price>
</book>
<book category="GK">
<title lang="en">Current Affairs</title>
<author>Author Name</author>
<year>2004</year>
<price>500.00</price>
</book>
<book category="Science">
<title lang="en">Science Book</title>
<author>Author 1</author>
<author>Author 2</author>
<author>Author 3</author>
<year>2011</year>
<price>150.00</price>
</book>
</bookstore>
<!--?xml version="1.0" encoding="UTF-8"?-->
<bookstore>
<book category="Child">
<title lang="en">ABC</title>
<author>Author Name</author>
<year>2020</year>
<price>100.00</price>
</book>
<book category="IT">
<title lang="en">XQuery Book</title>
<author>Author 1</author>
<author>Author 2</author>
<year>2005</year>
<price>300.00</price>
</book>
<book category="Sociology">
<title lang="en">Sociology 1</title>
<author>Author Name</author>
<year>2010</year>
<price>250.00</price>
</book>
<book category="GK">
<title lang="en">Current Affairs</title>
<author>Author Name</author>
<year>2004</year>
<price>500.00</price>
</book>
<book category="Science">
<title lang="en">Science Book</title>
<author>Author 1</author>
<author>Author 2</author>
<author>Author 3</author>
<year>2011</year>
<price>150.00</price>
</book>
</bookstore>
ABC Author Name 2020 100.00 XQuery Book Author 1 Author 2 2005 300.00 Sociology 1 Author Name 2010 250.00 Current Affairs Author Name 2004 500.00 Science Book Author 1 Author 2 Author 3 2011 150.00
Adding Elements and Attributes to the Result:
The elements and attributes can be added in the result from the input document (“books.xml).
Example:
for $x in doc("books.xml")/bookstore/book/title
order by $x
return $x
for xindoc("books.xml")/bookstore/book/titleorderbyx
return $x
for $x in doc("books.xml")/bookstore/book/title
order by $x
return $x
Explanation:
In the above example, we are using an XQuery expression to include both the title element and the lang attribute in the result. The title elements are thus returned in the same way as they are described in the input document. Here, we are returning the title elements in alphabetical order.
Result:
<title lang="en">ABC</title>
<title lang="en">Current Affairs</title>
<title lang="en">Science Book</title>
<title lang="en">Sociology 1</title>
<title lang="en">XQuery Book</title>
<title lang="en">ABC</title>
<title lang="en">Current Affairs</title>
<title lang="en">Science Book</title>
<title lang="en">Sociology 1</title>
<title lang="en">XQuery Book</title>
ABC Current Affairs Science Book Sociology 1 XQuery Book
Add HTML Elements and Text:
<h1>Bookstore</h1>
<ul>
{
for $x in doc("books.xml")/bookstore/book
order by $x/title
return <li>{data($x/title)}. Category: {data($x/@category)}</li>
}
</ul>
<h1>Bookstore</h1>
<ul>
{
for xindoc("books.xml")/bookstore/bookorderbyx/title
return <li>{data($x/title)}. Category: {data($x/@category)}</li>
}
</ul>
Bookstore
-
{
for $x in doc("books.xml")/bookstore/book
order by $x/title
return
- {data($x/title)}. Category: {data($x/@category)} }
Explanation:
In the above example, we are adding some HTML elements to the result. In an HTML list, we will put the result together with some text.
Result:
<h1>Bookstore</h1>
<ul>
<li>ABC. Category: CHILD</li>
<li>XQuery Book. Category: IT</li>
<li>Sociology 1. Category: SOCIOLOGY</li>
<li>Current Affairs. Category: GK</li>
<li>Science Book. Category: SCIENCE</li>
</ul>
<h1>Bookstore</h1>
<ul>
<li>ABC. Category: CHILD</li>
<li>XQuery Book. Category: IT</li>
<li>Sociology 1. Category: SOCIOLOGY</li>
<li>Current Affairs. Category: GK</li>
<li>Science Book. Category: SCIENCE</li>
</ul>
Bookstore
- ABC. Category: CHILD
- XQuery Book. Category: IT
- Sociology 1. Category: SOCIOLOGY
- Current Affairs. Category: GK
- Science Book. Category: SCIENCE
Add Attributes to the HTML Elements:
<h1>Bookstore</h1>
<ul>
{
for $x in doc("books.xml")/bookstore/book
order by $x/title
return <li class="{data($x/@category)}">{data($x/title)}</li>
}
</ul>
<h1>Bookstore</h1>
<ul>
{
for xindoc("books.xml")/bookstore/bookorderbyx/title
return <li class="{data($x/@category)}">{data($x/title)}</li>
}
</ul>
Bookstore
-
{
for $x in doc("books.xml")/bookstore/book
order by $x/title
return
- {data($x/title)} }
Explanation:
In the above example, we are using the category attribute as a class attribute in the HTML list.
Result:
<h1>Bookstore</h1>
<ul>
<li class="CHILD">ABC</li>
<li class="IT">XQuery Book</li>
<li class="SOCIOLOGY">Sociology 1</li>
<li class="GK">Current Affairs</li>
<li class="SCIENCE">Science Book</li>
</ul>
<h1>Bookstore</h1>
<ul>
<li class="CHILD">ABC</li>
<li class="IT">XQuery Book</li>
<li class="SOCIOLOGY">Sociology 1</li>
<li class="GK">Current Affairs</li>
<li class="SCIENCE">Science Book</li>
</ul>
Bookstore
- ABC
- XQuery Book
- Sociology 1
- Current Affairs
- Science Book