CODEWITHSUNDEEP
javaxmljaxbxsd
louis xie
louis xie

Reputation: 1422

XSD Date with attribute but optional value

How do I an XSD date value which is optional? Is there a way I could escape from using nillable?

For instance, both

<element attribute="attribute">optional-value</element>
<element attribute="attribute"/>

are valid types, where "optional-value" must be defined as an xsd:date type.

Upvotes: 0

Views: 1432

Answers (1)

Petru Gardea
Petru Gardea

Reputation: 21658

Yes, but not with something that tools like:

XSD:

<?xml version="1.0" encoding="utf-8" ?>
<xsd:schema targetNamespace="http://tempuri.org/XMLSchema.xsd" elementFormDefault="qualified" xmlns="http://tempuri.org/XMLSchema.xsd" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <xsd:element name="root">
        <xsd:complexType>
            <xsd:simpleContent>
                <xsd:extension base="EmptyDate">
                    <xsd:attribute name="attribute" type="xsd:string" use="required"/>
                </xsd:extension>
            </xsd:simpleContent>
        </xsd:complexType>
    </xsd:element>

    <xsd:simpleType name="EmptyDate">
        <xsd:union memberTypes="xsd:date emptyString"/>
    </xsd:simpleType>

    <xsd:simpleType name="emptyString">
        <xsd:restriction base="xsd:string">
            <xsd:length value="0"/>
        </xsd:restriction>
    </xsd:simpleType>
</xsd:schema>

Invalid XML:

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<!-- Sample XML generated by QTAssistant (http://www.paschidev.com) -->
<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" attribute="attribute1" xmlns="http://tempuri.org/XMLSchema.xsd"> </root>

Valid XML:

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<!-- Sample XML generated by QTAssistant (http://www.paschidev.com) -->
<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" attribute="attribute1" xmlns="http://tempuri.org/XMLSchema.xsd"/>

Upvotes: 3

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