xmlxsdttml

How to write xsd schema to allow me to miss the top level tag in xsd definition?

I want to create a XSD schema which is valid for both type of XML file:

<caption> 
    <tt>blah</tt>
</caption>

and

<tt>blah</tt>

And I tried minOccurs for caption but as it is the root it can't be minOccurs = 0 times. So, how to achieve this?

Solution

  • Just a tip

    <?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
    <!-- First possible root element -->
    <xs:element name="tt" type="xs:string"/>

    <!-- Second possible root element-->
    <xs:element name="caption">
        <xs:complexType>
            <xs:sequence>
                <!-- just reference to first defined element - when something change there, it won't be necessary to change it everywhere -->
                <xs:element ref="tt" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>

</xs:schema>

    Obviously there are other ways how to reach the same effect.