Thank for the answer.
Unfortunately, if I try to remove any dfdl:occursCountKind I get an error
from daffodil saying this attribute is missing.
I have removed the postfix attribute, thank you for the tip!
I have set all elements to be optional (minOccurs="0"), but I still get an
Initiator exception:
diff:
No differences
----------------------------------------------------------------- 91
parser: <Initiator/>
bitPosition: 4096
data:
│ │
87654321 0011 2233 4455 6677 8899 aabb ccdd eeff 0123456789abcdef
00000200: 3530 3030 3030 3130 3030 3030 3030 3230 5000001000000020
00000210: 3030 4555 5232 2020 2020 2020 2020 3030 00EUR2␣␣␣␣␣␣␣␣00
infoset:
<record>
<it02>
[....]
</it02>
<it03 />
</record>
diff:
No differences
failure:
Parse Error: Initiator '3' not found
Schema context: it03 Location line 71 column 14 in
file:/path/to/apache-daffodil-2.5.0-incubating-bin/bin/../../src/main/resources/grammar.dfdl.xsd
Data location was preceding byte 512
I would expect that if an initiator is not found, the parser would
backtrack and try the next element in the sequence. Is there a policy to be
set?
I have tried to replace the initiators with elements having fixed values,
but it seems that the fixed value is not checked. Example below, with
fixed="1":
<xs:element name="recordIdentifier" type="xs:string" fixed="1" dfdl:length="1"
dfdl:lengthKind="explicit" />
On Mon, Feb 3, 2020 at 3:17 PM Beckerle, Mike <[email protected]> wrote:
> I see a couple issues here.
>
> First your record element is not optional but you have
> dfdl:occursCountKind="implicit" on it, suggesting you wanted minOccurs="0"
> on it, or maxOccurs="unbounded", but you didn't put that.
>
> Same for it02 element, which probably wants minOccurs="0".
>
> Second, your records type has a sequence with postfix newline separator.
> Your inner sequence inside the record type *also* has postfix newline
> separator.
>
> This means you will have TWO newlines required at the end of your data.
>
> If you don't have two newlines, then it's going to backtrack and, while I
> can't construct a specific reason why it ends up giving you an error on
> it03, I can imagine that could happen.
>
> I suggest removing the postfix from the inner sequence so it is only infix
> separated, and the final newline will come from the outer sequence.
>
> Then I suggest making it02 element optional and record element optional or
> removing the dfdl:occursCountKind="implicit" from either or both of them.
>
> Then try again. Post your results here again.
>
> You may want to turn on the trace feature. You get TONS of sometimes
> obscure output from trace (fixing that is on our roadmap), but often one
> can wade through it and spot where things go wrong.
>
> If your format has many many of these different record sub-types you will
> eventually want to switch away from using initiators to a choice using the
> dfdl:choiceDispatchKey property.
>
> But we should get what you started with working properly first.
>
>
>
>
> ------------------------------
> *From:* Patrick Grandjean <[email protected]>
> *Sent:* Monday, February 3, 2020 2:23 PM
> *To:* [email protected] <[email protected]>
> *Subject:* Optional element with initiator
>
> Hi!
>
> I'm trying to create my first DFDL schema to parse a fixed column format.
> The format may change from one line to the other depending on the first
> character of the line. Some lines are optional, therefore I use
> minOccurs="0" and dlfl:occursCountKind="implicit". Here is the schema:
>
> <?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:ex="http://example.com";
> xmlns:ama="http://www.amadeus.com";
> targetNamespace="http://www.amadeus.com";
> elementFormDefault="unqualified">
>
> <xs:include
> schemaLocation="org/apache/daffodil/xsd/DFDLGeneralFormat.dfdl.xsd" />
> <xs:include schemaLocation="IT01.dfdl.xsd" />
> <xs:include schemaLocation="IT02.dfdl.xsd" />
> <xs:include schemaLocation="IT03.dfdl.xsd" />
> <xs:include schemaLocation="IT05.dfdl.xsd" />
>
> <xs:annotation>
> <xs:appinfo source="http://www.ogf.org/dfdl/";>
> <dfdl:format alignment="1"
> alignmentUnits="bytes"
> encoding="ASCII"
> encodingErrorPolicy="replace"
> escapeSchemeRef=""
> floating="no"
> ignoreCase="no"
> initiatedContent="no"
> initiator=""
> leadingSkip="0"
> lengthKind="implicit"
> lengthUnits="bytes"
> outputNewLine="%LF;"
> representation="text"
> separator=""
> separatorSuppressionPolicy="never"
> sequenceKind="ordered"
> terminator=""
> textBidi="no"
> textPadKind="none"
> textStringJustification="center"
> textStringPadCharacter="%WSP;"
> textTrimKind="padChar"
> trailingSkip="0"
> truncateSpecifiedLengthString="no"/>
> </xs:appinfo>
> </xs:annotation>
>
> <xs:element name="records" type="ama:Records" />
>
> <xs:complexType name="Records">
> <xs:sequence dfdl:separator="%NL;" dfdl:separatorPosition="postfix">
> <xs:element name="it01" minOccurs="0" maxOccurs="1"
> type="ama:IT01" dfdl:initiator="1" dfdl:occursCountKind="implicit" />
> <xs:element name="record" type="ama:Record" minOccurs="1"
> dfdl:occursCountKind="implicit" />
> </xs:sequence>
> </xs:complexType>
>
> <xs:complexType name="Record">
> <xs:sequence dfdl:separator="%NL;" dfdl:separatorPosition="postfix">
> <xs:element name="it02" type="ama:IT02" dfdl:initiator="2"
> dfdl:occursCountKind="implicit" />
> <xs:element name="it03" minOccurs="0" type="ama:IT03"
> dfdl:initiator="3" dfdl:occursCountKind="implicit" />
> <xs:element name="it05" minOccurs="0" type="ama:IT05"
> dfdl:initiator="5" dfdl:occursCountKind="implicit" />
> </xs:sequence>
> </xs:complexType>
>
> </xs:schema>
>
>
> A file would look like this:
>
> 1......
> 2......
> 5......
>
> Elements it01 (line starting with '1') and it02 (line starting with '2')
> are parsed successfully. Element it03 is missing, but since it is optional
> it is OK. The problem is that the Daffodil raises an error saying it has
> not found initiator '3'. How to make the initiator optional?
>
> Patrick.
>
