XML Schema enforce child elements without enforcing tag name

Question

I trying to make a schema for the following xml.

<root>
    <allow_any_name id="string">
        <required_tag_1>string</required_tag_1>
        <required_tag_2>string</required_tag_2>
        <required_tag_3>string</required_tag_3>
    </allow_any_name>

    <name1 id="string">
        <required_tag_1>string</required_tag_1>
        <required_tag_2>string</required_tag_2>
        <required_tag_3>string</required_tag_3>
    </name1>

    <name2 id="string">
        <required_tag_1>string</required_tag_1>
        <required_tag_2>string</required_tag_2>
        <required_tag_3>string</required_tag_3>
    </name2>

</root>

The main problem is that I can't find a way to specify the child elements with any specifying the tag name as well. In the above xml the allow_any_name tag could be any name.

I have tried <xs:any processContents="lax"></xs:any> which allow any tag name but does not allow me to specify the children.

I also tried using <xs:any processContents="strict" namespace="##local"></xs:any> which enforces the child elements but means I have to know all the tag names used (which I don't)

Thanks

Answer 1

It's not possible with XSD 1.0.

In XSD 1.1 it can be done using assertions.

Answer 2

I think this is not possible with XML Schema. I think you must change your structure from

<allow_any_name id="string">
  <required_tag_1>string</required_tag_1>
  <required_tag_2>string</required_tag_2>
  <required_tag_3>string</required_tag_3>
</allow_any_name>

to something like this:

<fixed_tag_name id="string" name="allow_any_name">
  <required_tag_1>string</required_tag_1>
  <required_tag_2>string</required_tag_2>
  <required_tag_3>string</required_tag_3>
</fixed_tag_name>

hth