ContentTypes 

comma-separated list of media types, as per [RFC2045]

Simple Type Information

Used By

Attributes form/@accept, input/@accept

Source 

<xs:simpleType name="ContentTypes">
  <xs:annotation>
    <xs:documentation>comma-separated list of media types, as per [RFC2045]</xs:documentation>
  </xs:annotation>
  <xs:restriction base="xs:string"/>
</xs:simpleType>