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4.8.23. mediaobject

Used for referencing images and other media. This element serves as a wrapper around these elements:

  • imageobject: Used to wrap image data. An imageobject can wrap exactly one image file. If more than one image file should be included in the mediaobject, you have to specify more than one imageobject. As in the following example, this could be done for multiple languages. An imageobject contains exactly one imagedata tag.

  • textobject: Used to wrap a description that shows up as the alt attribute to the HTML img tag. textobject contains exactly one phrase. If more phrases are needed, you need to specify more than one textobject.

Apart from imageobject and textobject, mediaobject may contain other XML elements for media files, such as videoobject and audioobject. 

<mediaobject>
  <imageobject>
    <imagedata fileref="screenshot.en.png" lang="en"/>
  </imageobject>
  <imageobject>
    <imagedata fileref="screenshot.de.png" lang="de"/>
  </imageobject>
  <textobject>
    <phrase lang="en">A screenshot</phrase>
  </textobject>
  <textobject>
    <phrase lang="de">Ein Mattscheiben-Foto</phrase>
  </textobject>
</mediaobject>

http://docbook.org/tdg/en/html/mediaobject.html