Make xsd element required

Question

I have an xml file that I am trying to check for an xsd file. Works great. I want to modify xsd to make the element value mandatory. How to do this, when I check the XML file, I want it to work if the FirstName element is empty ( <FirstName></FirstName> )

xml file

 <?xml version="1.0" encoding="utf-8" ?> <Patient> <FirstName>Patient First</FirstName> <LastName>Patient Last</LastName> </Patient> 

xsd file

 <?xml version="1.0" encoding="utf-8"?> <xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="Patient"> <xs:complexType> <xs:sequence> <xs:element name="FirstName" type="xs:string" /> <xs:element name="LastName" type="xs:string" /> </xs:sequence> </xs:complexType> </xs:element> </xs:schema> 

Answer 1

necessarily

MinOccurs attribute Optional. Specifies the minimum number of times that any element can occur in the parent element. The value can be any number> = 0. The default value is 1. (Default is required)

 <!-- mandatory true--> <xs:element name="lastName" type="xs:string" /> <!-- mandatory false--> <xs:element name="lastName" type="xs:string" minOccurs="0" /> 

Not empty

 <xs:element name="lastName" type="xs:string" > <xs:simpleType> <xs:restriction base="xs:string"> <xs:minLength value="1"/> </xs:restriction> </xs:simpleType> </xs:element>