How can I create a DTD from this xml file: <bookstore> <book category=\"COOKING\

Question

How can I create a DTD from this xml file:

<bookstore>
<book category="COOKING">
<title lang="en">Everyday Italian</title>
<author>Giada De Laurentiis</author>
<year>2005</year>
<price>30.00</price>
</book>
<book category="CHILDREN">
<title lang="en">Harry Potter</title>
<author>J K. Rowling</author>
<year>2005</year>
<price>29.99</price>
</book>
<book category="WEB">
<title lang="en">XQuery Kick Start</title>
<author>James McGovern</author>
<author>Per Bothner</author>
<author>Kurt Cagle</author>
<author>James Linn</author>
<author>Vaidyanathan Nagarajan</author>
<year>2003</year>
<price>49.99</price>
</book>
<book category="WEB">
<title lang="en">Learning XML</title>
<author>Erik T. Ray</author>
<year>2003</year>
<price>39.95</price>
</book>
</bookstore>

Any help would be appreciated.

Thanks

Explanation / Answer

<?xml version = "1.0"?>

<!DOCTYPE bookstore [

<!ELEMENT bookstore (shipping+, book+ )>

<!ELEMENT shipping ( duration )>

<!ATTLIST shipping shipID ID #REQUIRED>

<!ELEMENT book ( #PCDATA )>

<!ATTLIST book shippedBy IDREF #IMPLIED>

<!ELEMENT duration ( #PCDATA )>

]>

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