XML Validation with xsd schema

alishag229 · 08-06-2012, 08:11 PM

hi guys i am trying to validate my xsd file but i am getting this error

Errors in file lecturers.xsd:
6: 18 s4s-elt-must-match.1: The content of 'lecturers' must match (annotation?, (simpleType | complexType)?, (unique | key | keyref)*)). A problem was found starting at: complextype

XSD file

Code:

lecturers.xsd
1	<?xml version="1.0" encoding="UTF-8"?>
2	<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" >
3	
4	<xs:element name="lecturers">
5	
6	<xs:complextype>
7	<xs:element name="lecturer" minOccurs="1" maxOccurs="1">
8	<xs:complextype>
9	<xs:sequence>
10	<xs:element name="name">
11	<xs:complextype>
12	<xs:attribute name="title" type="xs:string" use="required"/>
13	<xs:attribute name="first" type="xs:string" use="required"/>
14	<xs:attribute name="last" type="xs:string" use="required"/>
15	</xs:complextype>
16	</xs:element>
17	<xs:element name="teaching" minOccurs="1" maxOccurs="unbounded">
18	<xs:complextype>
19	<xs:sequence>
20	<xs:element name="course">
21	<xs:complextype>
22	
23	<xs:simplecontent>
24	<xs:sequence>
25	<xs:extension base="xs:string">
26	<xs:attrbute name="code" type="xs:string" use="required"/>
27	</xs:extension>
28	</xs:sequence>
29	</xs:simplecontent>
30	
31	</xs:complextype>
32	</xs:element>
33	</xs:sequence>
34	</xs:complextype>
35	</xs:element>
36	<xs:element name="research" type="xs:string" minOccurs="0" maxOccurs="1"/>
37	</xs:sequence>
38	</xs:complextype>
39	</xs:element>
40	</xs:complextype>
41	</xs:element>
42	</xs:schema>

and here is the XML file

Code:

<?xml version="1.0" encoding="UTF-8"?>
<request 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 	xsi:noNamespaceSchemaLocation="lecturers.xsd">

<lecturers> 
	<lecturer>
		<name title="Professor" first="Peter" last="Quirk" />
		<teaching>
			<course code="CO3070">XML and the Web</course>
			<course code="CO3300">Web Server Architectures</course>
		</teaching>
		<research>The application of Web protocols to Biology</research>
	</lecturer>
</lecturers>

</request>

please help me find this error