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Editorial Team
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Asked: 2026-06-12T05:00:34+00:00

Let’s say I have an XML something like this: <root xmlns=default xmlns:add=additional> <element foo=fromDefault

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Let’s say I have an XML something like this:

<root xmlns="default" xmlns:add="additional">
    <element foo="fromDefault" />
    <add:element foo="fromDefault" add:bar="fromAdditional" />
</root>

What I would like to do is to merge the two element definitions to avoid duplications, something like this:

<root xmlns="default" xmlns:add="additional">
    <element foo="fromDefault" add:bar="fromAdditional" />
</root>

But I’m not even sure if this is possible.

I have the feeling it might be doable because we use some similar notations for the root elements like:

<root xmlns:xsi="..."
         xsi:schemaLocation="...">

Unfortunately I wasn’t able to find any docs/references/tutorials/anything about this issue, could someone help me clarify if what I would like to do is possible (or not) and share some links with me?

Thanks in advance!

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1 Answer

  1. Editorial Team

    I think that you are looking for something like this:

    additional.xsd

    <xs:schema 
  targetNamespace="additional"
  elementFormDefault="qualified"
  xmlns="additional"
  xmlns:mstns="http://tempuri.org/XMLSchema.xsd"
  xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <xs:attribute name="bar" type="xs:string"/>

</xs:schema>

    default.xsd

    <xs:schema 
  targetNamespace="default"
  elementFormDefault="qualified"
  xmlns="default"
  xmlns:mstns="http://tempuri.org/XMLSchema.xsd"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  xmlns:add="additional">

  <xs:import namespace="additional" schemaLocation="additional.xsd"/>

  <xs:element name="root">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="element" minOccurs="1" maxOccurs="1">
          <xs:complexType>
            <xs:attribute name="foo" type="xs:string"/>
            <xs:attribute ref="add:bar"/>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>

</xs:schema>

    The first schema defines only the ‘additional’ stuff (in the example just an attribute) and the second schema imports it and defines everything else, referencing the additional stuff where needed.

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