I would think it's very unlikely to affect performance but you can certainly
say

<xs:restriction base="OrigType">
   <xs:maxLength value="40"/>
</xs:restriction>

Michael Kay
http://www.saxonica.com/
 

> -----Original Message-----
> From: Sudheshna Iyer [mailto:sudheshnaiyer@h...] 
> Sent: 03 February 2007 23:57
> To: xml-dev@l...
> Subject: [xml-dev] Performance Vs Size of XSD + Extension of 
> restriction
> 
> Team,
> 
> Does the length of the xsd file has any impact on the performance?
> I want to decrease the size of my of XSD.
> 
> In the below type, line 1 and 3 are common for most of my 
> types. So how do I extend childTypes from the "OrigType" and 
> inherit only line 1 and 3 and change line 2.
> 
> OrigType:
> 
> 	<xs:simpleType name="OrigType">
> 		<xs:restriction base="xs:string">
> 			1. <xs:minLength value="1"/>
> 			2. <xs:maxLength value="20"/>
> 			3. <xs:whiteSpace value="collapse"/>
> 		</xs:restriction>
> 	</xs:simpleType>
> 
> ChildType:
> 
>                 <xs:simpleType name="ChildType"> -->This 
> should extend OrigType, inherit line 1,3 and add its own line 2
> 		<xs:restriction base="xs:string">
> 			1. <xs:minLength value="1"/>
> 			2. <xs:maxLength value="40"/> ---> 
> different from "OrigType"
> 			3. <xs:whiteSpace value="collapse"/>
> 		</xs:restriction>
> 	</xs:simpleType>
> 
> How do I achieve this?
> 
> Sudheshna
> 
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