callout 

<p>The callout element is only used for glyphs with class annotation. It contains the coordinate of the point where the annotation points to, as well as a reference to the element that is pointed to.</p>

Element Information

Model

point
Children: point

Attributes

QName Type Fixed Default Use Inheritable Annotation
target xsd:IDREF optional

Source 

<xsd:element name="callout" minOccurs="0" maxOccurs="1">
  <xsd:annotation>
    <xsd:documentation>
      <p>The callout element is only used for glyphs with class annotation. It contains the coordinate of the point where the annotation points to, as well as a reference to the element that is pointed to.</p>
    </xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="sbgn:point" minOccurs="1" maxOccurs="1"/>
    </xsd:sequence>
    <xsd:attribute name="target" type="xsd:IDREF" use="optional"/>
  </xsd:complexType>
</xsd:element>

Sample