Element AttributeRefExpression/statementQualifier : StatementQualifier[0 .. 1]
The statementQualifier element cannot have "xsi:nil" as an attribute.
The statementQualifier element in XML instance can be substituted with other elements.
XML Instance
<lql_parser_types:statementQualifierstatementKey="string" This attribute is required.></statementQualifier>