From MythTV
<themeinfo>
<!-- The Theme Name (Required) -->
<name>G.A.N.T.</name>
<!-- The Theme Types (Required) -->
<types>
<!-- Type. Legal Values are one or more of: UI, OSD and Menu -->
<type>UI</type>
</types>
<!-- Aspect ratio of the theme. (Required)
Maybe be: 4:3, 5:4, 16:9 or 16:10 -->
<aspect>4:3</aspect>
<!-- The base resolution of the theme before being scaled to the users
resolution (Required)
Usually 800x600 (4:3) or 1280x720 (16:9) -->
<baseres>800x600</baseres>
<!-- Theme Author Details (Optional)-->
<author>
<!-- Your name -->
<name>Oscar Carlsson</name>
<!-- Your Email Address -->
<email></email>
</author>
<!-- The Versioning Info (Required) -->
<version>
<!-- Major version changes mean the theme is no longer
compatible with earlier versions of mythtv -->
<major>1</major>
<!-- Minor version changes are backwards compatible -->
<minor>1</minor>
</version>
<!-- Theme Details (Required) -->
<detail>
<!-- At least one thumbnail image of the Main Menu must be included
with the theme.
There is no limit to the number of thumbnails.
Each thumbnail must be given a different name -->
<thumbnail name="Main Menu">preview.jpg</thumbnail>
<!-- A description of the theme, including general colours and
style. The description should include any details that
may help to locate your theme in a search. -->
<description>A Grey theme.</description>
<!-- Errata. A list of known faults, missing elements or unfinished
areas. e.g. "mythgallery not themed" -->
<errata>N/A</errata>
</detail>
</themeinfo>