title: XML array of objects in OpenAPI not showing tag names
body: <p>i am trying to generate an array of object, with the following path:</p>
  <pre><code>paths:
    /book/:
      get:
        tags:
          - &quot;Help&quot;
        summary: &quot;show my book&quot;
  
        produces:
        - &quot;application/xml&quot;
        - &quot;application/json&quot;
        parameters: []
        responses:
          &quot;200&quot;:
            description: &quot;successful operation&quot;
            schema:
              type: &quot;array&quot;
              xml:
                name: Book
              items:
                $ref: &quot;#/definitions/Book&quot;
          &quot;400&quot;:
            description: &quot;Invalid status value&quot;
        x-swagger-router-controller: &quot;swagger_server.controllers.book_controller&quot;
  </code></pre>
  <p>and the following definitions:</p>
  <pre><code>definitions:
    BookAuthor:
      type: object
      properties:
        Author:
          type: string
        Bio:
          type: string         
          xml: 
            attribute: true 
      xml:
        name: Author
    Book:
      type: object
      properties:
        Title:
          type: string
        Description:
          type: &quot;string&quot;
        BookAuthors:
          type: array
          items:
            $ref: &quot;#/definitions/BookAuthor&quot;
          xml:
            name: BookAuthors
            wrapped: true
      xml:
        name: &quot;MyBook&quot;
      example:
        Title: &quot;Name of the book&quot;
        description: &quot;Book Description&quot;
        BookAuthors: [[&quot;Author 1&quot;, &quot;Author 1 Bio&quot;], [&quot;Author 2&quot;, &quot;Author 2 Bio&quot;]]
  </code></pre>
  <p>The xml showing is missing the Author tags, being displayed as indexes (0,1), here what i am getting:</p>
  <pre><code>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
  &lt;MyBook&gt;
      &lt;Title&gt;Name of the book&lt;/Title&gt;
      &lt;description&gt;Book Description&lt;/description&gt;
      &lt;BookAuthors&gt;
          &lt;Author&gt;
              &lt;0&gt;Author 1&lt;/0&gt;  &lt;--- Here showing &lt;0&gt; instead of &lt;Author&gt;
              &lt;1&gt;Author 1 Bio&lt;/1&gt; &lt;--- Here showing &lt;1&gt; instead of &lt;Bio&gt;
          &lt;/Author&gt;
          &lt;Author&gt;
              &lt;0&gt;Author 2&lt;/0&gt;
              &lt;1&gt;Author 2 Bio&lt;/1&gt;
          &lt;/Author&gt;
      &lt;/BookAuthors&gt;
  &lt;/MyBook&gt;
  </code></pre>
  <p>How can i get the <code>&lt;Author&gt;&lt;/Author&gt; &amp; &lt;Bio&gt;&lt;/Bio&gt;</code> to be displayed?</p>