Simple XML schema :)

ken1307 · 12 Jan 2008 at 15:27

hello guys, I need some help here

The question:

Write an XML Schema equivalent to the following XML DTD (note:
xmlns:xsd="http://www.w3.org/2001/XMLSchema"):

Code:

<!ELEMENT book (title, chapter+)>
<!ATTLIST book
         type (fiction | non-fiction) #REQUIRED>
<!ELEMENT chapter (title, paragraph+)>
<!ELEMENT title (#PCDATA)>
<!ELEMENT paragraph (#PCDATA)>

My answer:

Code:

<?xml version ="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
	    targetNamespace="http://www.books.org"
	    xmlns="http://www.books.org"
	    elementFormDefault="qualified">
 <xsd:element name="book">
   <xsd:complexType>
     <xsd:sequence>
        <xsd:element ref="title" minOccurs="1" maxOccurs="1"/>
        <xsd:element ref="chapter" minOccurs="1" maxOccurs="unbounded"/>
     </xsd:sequence>
     <xsd:attribute name="type" use="required">
        <xsd:simpleType>	
	 <xsd:restriction base="xsd:string">
            <xsd:enumeration value="fiction"/>
	    <xsd:enumeration value="non-fiction"/>   	
	 </xsd:restriction>
        </xsd:simpleType>
     </xsd:attribute>	
   </xsd:complexType>
 </xsd:element>
 
 <xsd:element name="chapter">
	<xsd:complexType>
	  <xsd:sequence>
	    <xsd:element ref="title"     minOccurs="1" maxOccurs="1"/>
	    <xsd:element ref="paragraph" minOccurs="1" maxOccurs="unbounded"/>
	  </xsd:sequence>
	</xsd:complexType>  
 </xsd:element>
 <xsd:element name="title" type="xsd:string"/>
 <xsd:element name="paragraph" type="xsd:string"/>
</xsd:schema>

is it correct?

cheers :cool:

ken1307 · 12 Jan 2008 at 19:54

anyone? I used the Validator website and it said the schema is valid but not sure if its correct

RobH · 12 Jan 2008 at 20:07

From what I remember of my XML it looks correct to me, it would help if you had a sample XML document that you could use and then use your DTD and Schema to validate the document, you can probably write the XML document as it seems fairly trivial. I know for certain that Netbeans allows you to validate an XML document with a DTD or Schema, if the W3C one doesn't (I'd assume it looks at the DTD or Schema when validating though so it probably does check).

Yeggstry · 12 Jan 2008 at 20:14

Looks pretty good

What is this for?

ken1307 · 12 Jan 2008 at 20:38

@RobH: do you know any website that let me "compare" the DTD/Schema and sample XML data to see if they "match up"?

@Yeggstry: cheers

its just a question from the pastpaper. Im revising for my exam on Monday

Yeggstry · 12 Jan 2008 at 20:42

Cool

I'd imagine that even if you do make a mistake on the actual exam you'd probably only drop one or two points (assuming its a 5-10 point question I guess).

ken1307 · 12 Jan 2008 at 20:49

Yeggstry said:
Cool I'd imagine that even if you do make a mistake on the actual exam you'd probably only drop one or two points (assuming its a 5-10 point question I guess).

actually its just a 3 mark question :eek:

but every point counts in the exam so I need to make sure I do it correctly

RobH · 12 Jan 2008 at 21:16

ken1307 said:
@RobH: do you know any website that let me "compare" the DTD/Schema and sample XML data to see if they "match up"?

Well I know Netbeans (Java IDE) allows you to validate XML against Schema or DTD because that's what we used at Uni. You have to link the Schema to the XML file, this is an example from the W3C website:

<note
xmlns="http://www.w3schools.com"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.w3schools.com note.xsd">