grammar and AST don't match in the PeriodStatementList
In grammar
<PeriodStatementList>
<TheAPeriodStatList ordered-nodelist="StatementWithPeriod_"/>
</PeriodStatementList>
in AST (file IF101A.xml, line 2413)
<PeriodStatementList LineNr="220" EndLineNr="224" ColNr="6" EndColNr="22" ID="687">
<AList LineNr="220" EndLineNr="224" ColNr="6" EndColNr="22" ID="-688">
...
</AList>
</PeriodStatementList>