breath-mark 

The breath-mark element indicates a place to take a breath. It is typically notated with a comma / apostrophe symbol.

Element Information

Model

Attributes

QName Type Fixed Default Use Inheritable Annotation
color color optional
default-x tenths optional
default-y tenths optional
font-family comma-separated-text optional
font-size font-size optional
font-style font-style optional
font-weight font-weight optional
placement above-below optional
relative-x tenths optional
relative-y tenths optional

Source 

<xs:element name="breath-mark" type="empty-placement">
  <xs:annotation>
    <xs:documentation>The breath-mark element indicates a place to take a breath. It is typically notated with a comma / apostrophe symbol.</xs:documentation>
  </xs:annotation>
</xs:element>

Sample