# Version and support information

The following extension points are used by convention to define version and support info within a plugin.

- `package.support.name`
- `package.support.email`
- `package.version`

Note:

The toolkit does not currently do anything with these values, but may do so in the future.

The `package.version` value should follow the syntax rules:

    version   ::= major ( '.' minor ( '.' micro ( '.' qualifier )? )? )?

    major     ::= number
    minor     ::= number
    micro     ::= number
    qualifier ::= ( [0..9] | [a..zA..Z] | ’_’ | '-' )+

The default value is `0.0.0`.

## Example

    <plugin id="com.example.WithSupportInfo">
      <feature extension="package.support.name" value="Joe the Author"/>
      <feature extension="package.support.email" value="joe@example.com"/>
      <feature extension="package.version" value="1.2.3"/>
    </plugin>

Parent topic: Creating DITA-OT plug-ins