morph 

The controller element may contain either a skin element or a morph element.

Element Information

Model

source{2,unbounded} , targets , extra*
Children: extra, source, targets

Attributes

QName Type Fixed Default Use Inheritable Annotation
method morph_method_enum NORMALIZED optional 
The method attribute specifies the which blending technique to use. The accepted values are 
NORMALIZED, and RELATIVE. The default value if not specified is NORMALIZED.  Optional attribute.
source xs:anyURI required 
The source attribute indicates the base mesh. Required attribute.

Source 

<xs:element name="morph" type="morph_type">
  <xs:annotation>
    <xs:documentation>The controller element may contain either a skin element or a morph element.</xs:documentation>
  </xs:annotation>
</xs:element>

Sample