Question

1. Write an XML Schema for the following XML file satisfying the following requirements: a) comment element is required; b) publisher element should be of xsd:string type; c) price elements should be of xsd:float type. Validate the xml file against your XML Schema using the online validator: http://tools.decisionsoft.com/schemaValidate/.

<?xml version="1.0"?>

<bib>

​<comment>These books are still relevant </comment>

​<book year="1994">

​​<title>TCP/IP Illustrated</title>

​​<author>

​​​<last>Stevens</last>

​​​<first>Tim</first>

​​</author>

​​<publisher>Addison-Wesley</publisher>

​​<price discount="yes"> 65.95</price>

​</book>

​<book year="2003">

​​<title>Learning XML</title>

​​<author>

​​​<last>Erik</last>

​​​<middle >T</middle >

​​​<first>Ray</first>

​​</author>

​​<publisher>O'Reilly</publisher>

​​<price discount="yes">55.95</price>

​</book>

​<book year="2000">

​​<title>Data on the Web</title>

​​<author>

​​​<last>Abiteboul</last>

​​​<first>Serge</first>

​​</author>

​​<author>

​​​<last>Suciu</last>

​​​<first>Dan</first>

​​</author>

​​<publisher>Morgan Kaufmann</publisher>

​​<price discount="yes"> 39.95</price>

​</book>

</bib>

Answer 1

Hi There!!

Please find the XSD below. I have validated the schema from the mentioned website.Also, have made sure comments are mandatory ,element publisher is xsd:string and element price is xsd:float.

book.xsd:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="bib">
<xs:complexType mixed="true">
<xs:sequence>
<xs:element type="xs:string" name="comment" minOccurs="1"/>
<xs:element name="book" maxOccurs="unbounded" minOccurs="0">
<xs:complexType mixed="true">
<xs:sequence>
<xs:element type="xs:string" name="title"/>
<xs:element name="author" maxOccurs="unbounded" minOccurs="0">
<xs:complexType mixed="true">
<xs:sequence>
<xs:element type="xs:string" name="last"/>
<xs:element type="xs:string" name="middle" minOccurs="0"/>
<xs:element type="xs:string" name="first"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element type="xs:string" name="publisher"/>
<xs:element name="price">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="xs:float">
<xs:attribute type="xs:string" name="discount" use="optional"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute type="xs:short" name="year" use="optional"/>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>

Thanks!!Cheers!!Happy Chegging!!