Required fields in the XML patron schema

Question

How to tell what fields are required in the XML Patron Schema (https://developers.exlibrisgroup.com/wp-content/uploads/Voyager/PatronSchema.xsd)?

Answer

The key to this is the value for “minOccurs”.  By default, minOccurs = 1, if not explicitly stated.  So, any element without a minOccurs = 0 is required.  

Any element with minOccurs = 0 is therefor optional.

Additional Information

Example code from the XML Patron Schema

This (institutionID) is optional:

           <xs:element name="institutionID" nillable="true" minOccurs="0">
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:minLength value="1"/>
                        <xs:maxLength value="30"/>
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>
            
            

This (barcode) is not optional:

  <xs:element name="barcode">
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:minLength value="1"/>
                        <xs:maxLength value="25"/>
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>

• Article last edited: 07-Apr-2020