Java Desktop System Release 3 Administration Guide

Structure of the MIME Database

The following is a sample from the MIME type database:

<mime-type type="image/png">
		<comment>PNG image</comment>
		<comment xml:lang="de">PNG-Grafik</comment>
		:
		:
		:
		<magic priority="50">
			<match offset="0" type="string" value="\x89PNG" />
		</magic>
		<glob pattern="*.png" />
	</mime-type>

Table 5–1 describes the elements in the MIME type database.

Table 5–1 MIME Type Database Elements


Element	Description
`mime-info`	This is the document element, or highest level element in the MIME database. This element contains the required information for all MIME types. The namespace URI of this element is as follows: http://www.freedesktop.org/standards/shared-mime-info
`mime-type`	Describes one MIME type. This element has a `type` attribute, which specifies the MIME type.
`comment`	Provides a description of the MIME type that is used in the user interface. The description can be displayed in the file manager and other applications. The database might contain `comment` elements with `xml:lang` attributes. These elements can provide the descriptive text in other languages.
`magic`	Contains `match` elements. The `match` elements specify a particular pattern to search for in the contents of a file. This associates a specific pattern in a file with the MIME type specified in the `mime-type` element. If an application finds a match for the pattern, the MIME type associated with the pattern is the MIME type of the file. The `magic` element includes a `priority` attribute. You can specify a priority value for the pattern. If there are identical patterns in the `magic` elements in the MIME database, the element with the highest priority value takes precedence. For more information about the attributes of a `match` element, see Attributes in Match Elements.
`glob`	Specifies a filename pattern to match with the MIME type. Any file that matches this filename pattern takes this MIME type.
`root-XML`	If a file is identified as an XML file, you can associate a more specific MIME type than `text/xml` with the file. To do this, you assign values to the following attributes of the `root-XML` element: `namespaceURI`: Type a namespace that uniquely identifies the type of XML file. `localName`: Type a local name for the XML file. This name uniquely identifies the MIME type within the namespace of the XML file. This element is optional. This element is not present in the example.