An DiagnosticInfo value is encoded as an xs:complexType with the following XML schema:

<xs:complexType name="DiagnosticInfo">

<xs:sequence>

<xs:element name="SymbolicId" type="xs:int" minOccurs="0" />

<xs:element name="NamespaceUri" type="xs:int" minOccurs="0" />

<xs:element name="Locale" type="xs:int" minOccurs="0/>

<xs:element name="LocalizedText" type="xs:int" minOccurs="0/>

<xs:element name="AdditionalInfo" type="xs:string" minOccurs="0"/>

<xs:element name="InnerStatusCode" type="tns:StatusCode"

minOccurs="0" />

<xs:element name="InnerDiagnosticInfo" type="tns:DiagnosticInfo"

minOccurs="0" />

</xs:sequence>

</xs:complexType>

DiagnosticInfo is recursive and unlimited recursion could result in stack overflow errors even if the message size is less than the maximum allowed. Decoders shall support at least 4 recursion levels and are not expected to support more than 10. Decoders shall report an error if the number of recursion levels exceeds what it supports.