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https://issues.apache.org/jira/browse/CSV-293?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul Millar updated CSV-293:
----------------------------
    Description: 
The [CSVW namespace|https://www.w3.org/ns/csvw] provides metadata describing a 
CSV file.  One element of this is the ability to associate certain certain 
values with the {{null}} value, as recorded by the [csvw:null 
property|https://www.w3.org/ns/csvw#property-definitions].

This definition corresponds (broadly) to the "null String" concept (see 
[org.apache.commons.csv.CSVFormat#setNullString|http://commons.apache.org/proper/commons-csv/apidocs/org/apache/commons/csv/CSVFormat.Builder.html#setNullString-java.lang.String-]),
 with one noticeable difference: {{CSVFormat}} supports only a single "null 
String" value while CSVW, through {{csvw:null}}, supports multiple Strings.

In order to fully support CSVW, it would be helpful if {{CSVFormat}} were to be 
updated to allow multiple null String values.

  was:
The [CSVW namespace|https://www.w3.org/ns/csvw] provides metadata describing a 
CSV file.  One element of this is the ability to associate certain certain 
values with the {{null}} value, as recorded by the [csvw:null 
property|https://www.w3.org/ns/csvw#property-definitions].

This definition corresponds (broadly) to the "null String" concept (see 
[org.apache.commons.csv.CSVFormat#setNullString|http://commons.apache.org/proper/commons-csv/apidocs/org/apache/commons/csv/CSVFormat.Builder.html#setNullString-java.lang.String-]),
 with one noticeable difference: {{CSVFormat}} supports only a single "null 
String" value while CSVW, through {{csvw:null}, supports multiple Strings.

In order to fully support CSVW, it would be helpful if {{CSVFormat}} were to be 
updated to allow multiple null String values.


> Add support for multiple null String values
> -------------------------------------------
>
>                 Key: CSV-293
>                 URL: https://issues.apache.org/jira/browse/CSV-293
>             Project: Commons CSV
>          Issue Type: Improvement
>          Components: Parser
>    Affects Versions: 1.9.0
>            Reporter: Paul Millar
>            Priority: Minor
>
> The [CSVW namespace|https://www.w3.org/ns/csvw] provides metadata describing 
> a CSV file.  One element of this is the ability to associate certain certain 
> values with the {{null}} value, as recorded by the [csvw:null 
> property|https://www.w3.org/ns/csvw#property-definitions].
> This definition corresponds (broadly) to the "null String" concept (see 
> [org.apache.commons.csv.CSVFormat#setNullString|http://commons.apache.org/proper/commons-csv/apidocs/org/apache/commons/csv/CSVFormat.Builder.html#setNullString-java.lang.String-]),
>  with one noticeable difference: {{CSVFormat}} supports only a single "null 
> String" value while CSVW, through {{csvw:null}}, supports multiple Strings.
> In order to fully support CSVW, it would be helpful if {{CSVFormat}} were to 
> be updated to allow multiple null String values.



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