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| digoshc |
 Posted: Mon Nov 11, 2013 3:02 am Post subject: Define a default value for a nil value in DFDL Schema |
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Apprentice
Joined: 11 Jul 2013
Posts: 25
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Hi,
Is it possible to define a default value for a nil value in a DFDL Schema? For example, I do have a field in a record oriented text where it can have the following values: @Value@ or NULL.
The @ is the initiator and the terminator delimiter of the field, however, it will not be present if the value is NULL. So, I was thinking to use the dfdl:nilValueDelimiterPolicy=none and define the default value of a nil to NULL. Is that possible?
Env: WMB 8.0.0.2|Windows |
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| smdavies99 |
| Posted: Mon Nov 11, 2013 3:56 am Post subject: |
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Jedi Council
Joined: 10 Feb 2003
Posts: 6076
Location: Somewhere over the Rainbow this side of Never-never land.
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A simple search for
DFDL Default Value
will give you a lot of information
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Every time you reinvent the wheel the more square it gets (anon). If in doubt think and investigate before you ask silly questions. |
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| kimbert |
| Posted: Mon Nov 11, 2013 4:02 am Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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| Quote: |
| I was thinking to use the dfdl:nilValueDelimiterPolicy=none and define the default value of a nil to NULL. Is that possible? |
Yes - you have correctly understood what the nilValueDelimitedPolicy is for. If the input data contain the string 'NULL' then the message tree will contain the value NULL. Otherwise, the input field must have the initiator and terminator of '@'.
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Before you criticize someone, walk a mile in their shoes. That way you're a mile away, and you have their shoes too. |
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| digoshc |
| Posted: Mon Nov 11, 2013 5:05 am Post subject: |
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Apprentice
Joined: 11 Jul 2013
Posts: 25
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@kimbert: well, the Test Parse Model(DFDL Schema Editor) does not behave as you described or I'm missing something. My test:
the input: NULL
the element defined:
<xsd:element default="NULL" dfdl:initiator="@" dfdl:nilValueDelimiterPolicy="none" dfdl:terminator="@" ibmDfdlExtn:sampleValue="NULL" name="XXXXX" type="xsd:string"/>
the error log:
CTDP3041E: Initiator '@' not found at offset '27' for element '/YYYYY[1]/body[1]/XXXXX[1]'.
ParsedDataRegion[InfixSeparator, startOffset = 26, length = 1, scd = #xscd(/schemaElement::XXXXX/type::0/model::sequence/schemaElement::body/type::0/model::sequence)] |
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| kimbert |
| Posted: Mon Nov 11, 2013 7:06 am Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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Note that a default value is not the same as a nil value. The element needs to be nillable, and you need to set up the nil-related properties. In this case you need
- nillable=true
- nilKind='nilLiteralValue'
- NilValue='NULL'
- nilValueDelimiterPolicy='none'
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Before you criticize someone, walk a mile in their shoes. That way you're a mile away, and you have their shoes too. |
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| digoshc |
| Posted: Mon Nov 11, 2013 4:00 pm Post subject: |
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Apprentice
Joined: 11 Jul 2013
Posts: 25
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| Yeah, I was looking for the Nilvalue. It worked. Thank you. |
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