intensity 

Intensity
This is a positive number between 0 and 1 used to set a relative scale 
        of the intensity or strength of some behavior, such as a handshake or an emotion.

Attribute Information

Used By

Complex Types Channel, Emotion, Haptic, Intent, Kinesic, Thought

Source 

<xs:attribute name="intensity">
  <xs:annotation>
    <xs:documentation xml:lang="en">Intensity This is a positive number between 0 and 1 used to set a relative scale of the intensity or strength of some behavior, such as a handshake or an emotion.</xs:documentation>
    <xs:appinfo>NONE</xs:appinfo>
  </xs:annotation>
</xs:attribute>

Sample