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  <!-- Home / chooser page -->
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    <lastmod>2026-06-17</lastmod>
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  <!-- Lesson 1: Your first dbt model -->
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    <loc>https://transformation-lab.datagym.io/lesson/1</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
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  </url>

  <!-- Lesson 2: ref() and the DAG -->
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    <loc>https://transformation-lab.datagym.io/lesson/2</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
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  <!-- Lesson 3: Multi-step pipelines -->
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    <loc>https://transformation-lab.datagym.io/lesson/3</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Lesson 4: Materializations: view vs table -->
  <url>
    <loc>https://transformation-lab.datagym.io/lesson/4</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Lesson 5: Selecting models -->
  <url>
    <loc>https://transformation-lab.datagym.io/lesson/5</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Lesson 6: Sources -->
  <url>
    <loc>https://transformation-lab.datagym.io/lesson/6</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Lesson 7: Seeds -->
  <url>
    <loc>https://transformation-lab.datagym.io/lesson/7</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Lesson 8: Data tests: not_null & unique -->
  <url>
    <loc>https://transformation-lab.datagym.io/lesson/8</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
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  <!-- Lesson 9: Relationships & accepted_values -->
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    <loc>https://transformation-lab.datagym.io/lesson/9</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
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  <!-- Lesson 10: Documentation -->
  <url>
    <loc>https://transformation-lab.datagym.io/lesson/10</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Lesson 11: Project structure: staging, intermediate, marts -->
  <url>
    <loc>https://transformation-lab.datagym.io/lesson/11</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Lesson 12: Selecting subsets: unions & graph operators -->
  <url>
    <loc>https://transformation-lab.datagym.io/lesson/12</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Lesson 13: Custom (singular) tests -->
  <url>
    <loc>https://transformation-lab.datagym.io/lesson/13</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Lesson 14: Putting it all together: dbt build -->
  <url>
    <loc>https://transformation-lab.datagym.io/lesson/14</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Privacy Policy -->
  <url>
    <loc>https://transformation-lab.datagym.io/privacy</loc>
    <lastmod>2026-06-17</lastmod>
    <changefreq>yearly</changefreq>
    <priority>0.5</priority>
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