cvc-complex-type.2.4.a: complex type with child-element and attributes

Question

I try to define some xsd scheme for my xml files.

The xml structure is something like

<?xml version="1.0" encoding="UTF-8"?>
<product name="abc" xmlns="http://example.org/productMetadata.xsd"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://example.org/productMetadata.xsd productMetadata.xsd">
    <metainf />
</product>

(root tag with some defined attribute "name" and some nested tags as in the example "metainf")

My approach in defining the xsd looks like

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    targetNamespace="http://example.org/productMetadata.xsd" xmlns="http://example.org/productMetadata.xsd">

    <xsd:element name="product">
        <xsd:complexType>
            <xsd:all>
                <xsd:element type="xsd:string" name="metainf" />
            </xsd:all>
            <xsd:attribute type="xsd:string" name="name" />
        </xsd:complexType>
    </xsd:element>

</xsd:schema>

Nevertheless, I'm not able to validate the xml against the xsd.

Depending on the validator (I used java, a web-app and eclipse) I get the following failure message.

Invalid content was found starting with element 'metainf'. One of '{metainf}' is expected.

or

Cvc-complex-type.2.4.a: Invalid Content Was Found Starting With Element 'metainf'. One Of '{metainf}' Is Expected., Line '5', Column '13'.

Anyone some hint, what's wrong with my xsd or xml.

score 2 · Accepted Answer · edited Jun 20 '20 at 09:12

Just add elementFormDefault="qualified" on the xsd:schema declaration, like so:

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    elementFormDefault="qualified"
    targetNamespace="http://example.org/productMetadata.xsd" xmlns="http://example.org/productMetadata.xsd">

As per the documentation of the elementFormDefault attribute:

The form for elements declared in the target namespace of this schema. The value must be "qualified" or "unqualified". Default is "unqualified".

"unqualified" indicates that elements from the target namespace are not required to be qualified with the namespace prefix.

"qualified" indicates that elements from the target namespace must be qualified with the namespace prefix.

Right (+1) but there are comprehensive answers to duplicate questions already in existence. — kjhughes, Dec 21 '17 at 14:26

cvc-complex-type.2.4.a: complex type with child-element and attributes

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