Search in INFO and CATEGORIES :

<SEARCH>
  <MEDIA>
    <INFO>
      <MEDIATYPE>Product</MEDIATYPE>
    </INFO>
    <CATEGORY name="Food"/>
  </MEDIA>
</SEARCH>

This query will match the Products with the Food category. Both conditions apply (AND logical operator).

Search in INFO and DESCRIPTION :

<SEARCH>
  <MEDIA>
    <INFO>
      <MEDIATYPE>Recipe</MEDIATYPE>
    </INFO>
    <DESCRIPTION>
      <TITLE>Carots</TITLE>
    </DESCRIPTION>
  </MEDIA>
</SEARCH>

We are looking for recipes with Carots in the title.

Search in INFO and DEPENDENCIES :

<SEARCH>
  <MEDIA>
    <INFO>
      <MEDIATYPE>Gallery</MEDIATYPE>
    </INFO>
    <DEPENDENCY type="mediaNavigation">
      <MEDIA ID="25"/>
    </DEPENDENCY>
  </MEDIA>
</SEARCH>

We are looking for the galleries containing the Media with ID 25.