I'm having a problem with the attached schema. In the discriminators (lines 44 & 51), I cannot get Daffodil to access the value of Type (line 34). When I tried ../Type, it says valid options are P_INT32 & P_UINT32, I figured I needed to go back another level, but ../../Type doesn't work either. At this point it says valid options are Msg_ID & Parameter, which are too far back! However, line 37 has no problem accessing Length (line35). Anyone have an explanation for this? ...or even better, a solution?
<?xml version="1.0" encoding="UTF-8"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"; xmlns:dfdl="http://www.ogf.org/dfdl/dfdl-1.0/"; xmlns:daf="urn:ogf:dfdl:2013:imp:daffodil.apache.org:2018:ext" xmlns:fn="http://www.w3.org/2005/xpath-functions";> <xs:annotation> <xs:appinfo source="http://www.ogf.org/dfdl/";> <dfdl:format alignmentUnits="bits" lengthUnits="bits" representation="binary" binaryNumberRep="binary" byteOrder="bigEndian" bitOrder="mostSignificantBitFirst" choiceLengthKind="implicit" lengthKind="implicit" alignment="1" encodingErrorPolicy="replace" binaryFloatRep="ieee" calendarPatternKind="implicit" documentFinalTerminatorCanBeMissing="yes" emptyValueDelimiterPolicy="none" escapeSchemeRef="" fillByte="f" floating="no" ignoreCase="no" initiatedContent="no" initiator="" leadingSkip="0" separator="" separatorPolicy="suppressed" outputNewLine="%CR;%LF;" textStandardZeroRep="0" textStandardInfinityRep="Inf" textStandardExponentRep="E" textStandardNaNRep="NaN" textNumberPattern="#,##0.###;-#,##0.###" textNumberRounding="explicit" textNumberRoundingMode="roundUnnecessary" textNumberRoundingIncrement="0" textStandardGroupingSeparator="," separatorPosition="infix" sequenceKind="ordered" terminator="" textBidi="no" textNumberCheckPolicy="strict" textNumberRep="standard" textOutputMinLength="0" textPadKind="none" textStandardBase="10" textTrimKind="none" trailingSkip="0" truncateSpecifiedLengthString="no" utf16Width="fixed" encoding="US-ASCII" nilKind="literalValue" nilValueDelimiterPolicy="none" occursCountKind="parsed" binaryBooleanTrueRep="1" binaryBooleanFalseRep="0" /> </xs:appinfo> </xs:annotation> <xs:element name="Var_Params" > <xs:complexType> <xs:sequence> <xs:element name="Msg_ID" type="unsignedint16" /> <xs:element name="Parameter" maxOccurs="unbounded" minOccurs="1" > <xs:complexType> <xs:sequence> <xs:element name="Type" type="unsignedint4" /> <xs:element name="Length" type="unsignedint8" /> <xs:element name="Tag_ID" type="xs:int" dfdl:lengthUnits="bits" dfdl:lengthKind="explicit" dfdl:length="20" /> <xs:element name="Values" dfdl:lengthKind="explicit" dfdl:lengthUnits="bytes" dfdl:length="{../Length}" > <xs:complexType> <xs:sequence> <xs:choice> <xs:element name="P_INT32" type="signedint32" maxOccurs="unbounded" dfdl:occursCountKind="implicit" > <xs:annotation> <xs:appinfo source="http://www.ogf.org/dfdl/";> <dfdl:discriminator test="{ ../Type eq 1 }" /> </xs:appinfo> </xs:annotation> </xs:element> <xs:element name="P_UINT32" type="unsignedint32" maxOccurs="unbounded" dfdl:occursCountKind="implicit" > <xs:annotation> <xs:appinfo source="http://www.ogf.org/dfdl/";> <dfdl:discriminator test="{ ../Type eq 2 }" /> </xs:appinfo> </xs:annotation> </xs:element> </xs:choice> </xs:sequence> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> <xs:simpleType name="boolean" dfdl:length="1" dfdl:lengthKind="explicit"> <xs:restriction base="xs:unsignedInt"/> </xs:simpleType> <xs:simpleType name="unsignedint4" dfdl:length="4" dfdl:lengthKind="explicit"> <xs:restriction base="xs:unsignedInt"/> </xs:simpleType> <xs:simpleType name="unsignedint8" dfdl:length="8" dfdl:lengthKind="explicit"> <xs:restriction base="xs:unsignedInt"/> </xs:simpleType> <xs:simpleType name="unsignedint16" dfdl:length="16" dfdl:lengthKind="explicit"> <xs:restriction base="xs:unsignedInt"/> </xs:simpleType> <xs:simpleType name="hexBin16" dfdl:length="16" dfdl:lengthKind="explicit"> <xs:restriction base="xs:hexBinary"/> </xs:simpleType> <xs:simpleType name="hexBin32" dfdl:length="32" dfdl:lengthKind="explicit"> <xs:restriction base="xs:hexBinary"/> </xs:simpleType> <xs:simpleType name="hexBin64" dfdl:length="64" dfdl:lengthKind="explicit"> <xs:restriction base="xs:hexBinary"/> </xs:simpleType> <xs:simpleType name="signedint32" dfdl:length="32" dfdl:lengthKind="explicit"> <xs:restriction base="xs:int"/> </xs:simpleType> <xs:simpleType name="unsignedint32" dfdl:length="32" dfdl:lengthKind="explicit"> <xs:restriction base="xs:unsignedInt"/> </xs:simpleType> </xs:schema>
