XML Schema design help

[Balaji Loganathan]

Hi,
Is it possible to restrict the data in XML to a limited value by using Schema..
To be clear,
For example..please look the below XSD and XML.
file:Members.XSD
<xsd:element name="Members">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="Member" minOccurs="0" maxOccurs="unbounded">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="title" type="xsd:string"/>
<xsd:element name="name" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:sequence>
<xsd:complexType>
</xsd:element>
file:Members.XML

<Members>
<Member><title>Mr</title><name>Balaji</name></Member>
<Member><title>Dr</title><name>Rangaraj</name></Member>
</Members>

Now is it possible via Schema to restrict the data in child element <title> to be either
Mr or Mrs or Ms or Dr.

Or is it possible to refer to external XML file which has the these value like
file:titles.XML
<titles>
<title>Mr</title>
<title>Mrs</title>
<title>Dr</title>
<title>Ms</title>
</titles>
and restrict the Members.XML child element <title> to have only datas in titles.XML.

Sorry for this long post.Please give me some tips or any URL to refer for this particular reqt.

Regards
Balaji

[Hema Menon]

Use Enumeration facet to constrain the values of <title> element.
The enumeration can have the values "Mr, Mrs, Dr" etc.
<xsd:simpleType name="title">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="Mr"/>
<xsd:enumeration value="Mrs"/>
<xsd:enumeration value="Dr"/>
<xsd:enumeration value="Ms"/>
</xsd:restriction>
</xsd:simpleType>
HTH,
Hema

[Balaji Loganathan]

Hi Hema,
Thanks a lot for your help.Its worked for me.
Could please tell me whether its possible to refer to external XML file which has the these value like file:titles.XML( Please refer my previous question).
Because Some time I may have to store large datas in enumeration like coutries list in that case the total XSD file may grow larger and larger. Please suggest.
Thanks again.
Regards

[Balaji Loganathan]

Here the solution I found for mz second question,please comment if its a wrong approach.
Thanks Menon Hema ,you made me think.
<?xml version="1.0"?>
<xsd:schema targetNamespace="http://www.hello.org" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.hello.org" elementFormDefault="qualified">
<xsd:include schemaLocation="toshowlist.xsd"/>
<xsd:element name="Root">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="Value" maxOccurs="unbounded">
<xsd:complexType>
<xsd:sequence>
<xsd:element ref="Value_type"/>
<xsd:element name="Amount" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>
*///////////////
<?xml version="1.0"?>
<!-- edited with XML Spy v4.1 U (http://www.xmlspy.com) by () -->
<xsd:schema targetNamespace="http://www.hello.org" xmlns="http://www.hello.org" xmlns:xsd="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
<xsd:element name="Value_type" type="list">
</xsd:element>
<xsd:simpleType name="list">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="abcd"/>
<xsd:enumeration value="efgh"/>
<xsd:enumeration value="saas"/>
<xsd:enumeration value="sasas"/>
</xsd:restriction>
</xsd:simpleType>
</xsd:schema>
*////////////////////////
<?xml version="1.0" encoding="UTF-8"?>
<Root xmlns="http://www.hello.org" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.hello.org
toshow.xsd">
<Value>
<Value_type>abcd</Value_type>
<Amount>String</Amount>
</Value>
</Root>
Regards
Balaji