It is a nice feature for a software center to allows users the installation of additional input-methods. This meta-info specification describes how metadata about input-methods should be structured.
		
			Software components providing an input-method can ship one or more files in /usr/share/appdata/%{id}.metainfo.xml.
		
			Input-method metadata files can - just likle all other metainfo files - be translated. See the section about translation for more information about that.
		
			The input-method meta-info file should look like this:
		
<?xml version="1.0" encoding="UTF-8"?>
<component type="inputmethod">
  <id>mathwriter-ibus.db</id>
  <metadata_license>CC0</metadata_license>
  <name>Mathwriter</name>
  <summary>Math symbols input method</summary>
  <description>
    <p>
      The input method is designed for entering mathematical symbols.
    </p>
    <p>
      Input methods are typing systems allowing users to input complex languages.
      They are necessary because these contain too many characters to simply be laid
      out on a traditional keyboard.
    </p>
  </description>
  <url type="homepage">https://github.com/mike-fabian/ibus-table-others</url>
</component>
      2.5.3. File specification
			Note that the XML root must have the type property set to inputmethod. This clearly identified this metainfo document as describing an input-method instead of a generic software-component.
		
- <id/>
- 
						For input-methods, the - %{id}is the same name as the input-method's database filename.
 
- <metadata_license/>
- <name/>
- 
						Set a name for your input-method.
					 
- <summary/>
- 
						A short description of the input-method described in this metainfo file.
					 
- <description/>
- 
						Add a long description of the input-method.
					 - 
						Do not assume the format is HTML. Only paragraph, ordered list and unordered list are supported at this time.
					 
- <screenshots/>
- 
						A screenshot may be included, showing the input-method in use in an application.
					 
- <url/>
- 
						This is a recommended tag for links of type  - homepage- . Links of type  - homepage-  should be a link to the upstream homepage for the application. See See  <url/>-  for a description of this tag.
					 
- <provides/>
- 
						This tag is described for generic components at  <provides/>-  in detail.
					 
- 
						You can add one or more children of type - <library/>in case you publish some additional shared libraries. If not, and there are no public binaries involved, you may omit the- providestag for input-methods.