Doesn't separatorSuppressionPolicy=trailingEmpty mean the input can suppress (omit) separators?

[Roger L Costello]

Hi Folks,

My input consists of 3 data items separated by slash, e.g.,

A/B/C

The middle data item is optional.

If there is no data for the middle data item, I want the separator suppressed 
(omitted), so I use separatorSuppressionPolicy="trailingEmpty". I expect this 
to be the appropriate input:

A/C

Is that correct?

When I run my DFDL schema I get this error: 

        Parse Error: Separator '/' not found

When I use this input:

A//C

There is no error.

I'm confused. I thought separatorSuppressionPolicy="trailingEmpty" means that I 
can suppress (omit) the separator when there is no data available. What am I 
failing to understand?  Below is my DFDL schema.  /Roger

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:dfdl="http://www.ogf.org/dfdl/dfdl-1.0/"; 
xmlns:xs="http://www.w3.org/2001/XMLSchema";>
    <xs:annotation>
        <xs:appinfo source="http://www.ogf.org/dfdl/";>
            <dfdl:format textBidi="no" floating="no" 
encodingErrorPolicy="replace" outputNewLine="%CR;%LF;" leadingSkip="0" 
trailingSkip="0" alignment="1" alignmentUnits="bytes" textPadKind="none" 
textTrimKind="none" truncateSpecifiedLengthString="no" escapeSchemeRef=""
                representation="text" encoding="ASCII" lengthKind="delimited" 
initiator="" terminator="" ignoreCase="yes" sequenceKind="ordered" separator="" 
initiatedContent="no" emptyValueDelimiterPolicy="none" fillByte="%SP;" 
textNumberRep="standard" textStandardBase="10"
                textStandardZeroRep="0" textNumberRounding="pattern" 
textStandardExponentRep="E" textNumberCheckPolicy="strict" 
lengthUnits="characters" nilKind="literalValue" nilValue="-" 
nilValueDelimiterPolicy="none" 
separatorSuppressionPolicy="trailingEmptyStrict"/>
        </xs:appinfo>
    </xs:annotation>
    <xs:element name="test">
        <xs:complexType>
            <xs:sequence dfdl:separator="/" dfdl:separatorPosition="infix"
                        dfdl:separatorSuppressionPolicy="trailingEmpty">
                <xs:element name="A" type="non-zero-length-string" 
dfdl:lengthPattern="A"/>
                <xs:element name="B" minOccurs="0" 
                dfdl:occursCountKind="implicit" 
                type="non-zero-length-string" 
                dfdl:lengthPattern="B"/>
                <xs:element name="C" type="non-zero-length-string" 
dfdl:lengthPattern="C"/>
            </xs:sequence>
        </xs:complexType>
    </xs:element>
    
    <xs:simpleType name="non-zero-length-string" dfdl:lengthKind="pattern">
        <xs:annotation>
            <xs:appinfo source="http://www.ogf.org/dfdl/";>
                <dfdl:assert test="{ . ne '' }"/>
            </xs:appinfo>
        </xs:annotation>
        <xs:restriction base="xs:string"/>
    </xs:simpleType>
</xs:schema>