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https://issues.apache.org/jira/browse/JENA-2318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17514606#comment-17514606
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Andy Seaborne commented on JENA-2318:
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"02022-01-02" is not legal as xsd:date.
If more than 4 digits must start with 1-9, not zero (makes the date canonical).
"-2022-01-02"^^xsd:dateTime has no part time so it is not an xsd:date. Cast it.
{{xsd:dateTime("-2022-01-02"^^xsd:date)}}
This is in your own comment on schemaorg/schemaorg/issues/1781 so why is it a
bug?
> jena rejects some valid xsd:date literals
> -----------------------------------------
>
> Key: JENA-2318
> URL: https://issues.apache.org/jira/browse/JENA-2318
> Project: Apache Jena
> Issue Type: Bug
> Reporter: Vladimir Alexiev
> Priority: Major
>
> (related to https://github.com/schemaorg/schemaorg/issues/1781)
> On a query like this:
> {noformat}
> PREFIX schema: <http://schema.org/>
> PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
> select * {
> bind("2022-01-01"^^schema:Date < "02022-01-02"^^schema:Date as ?x1)
> bind(str("2022-01-01"^^schema:Date) < str("02022-01-02"^^schema:Date) as
> ?x2)
> bind("2022-01-01"^^xsd:date < "02022-01-02"^^xsd:date as ?x3)
> bind("1"^^schema:Integer < "02"^^schema:Integer as ?x4)
> bind(str("1"^^schema:Integer) < str("02"^^schema:Integer) as ?x5)
> bind("1"^^xsd:integer < "02"^^xsd:integer as ?x6)
> }
> {noformat}
> - http://sparql.org/sparql.html returns UNDEF for ?x3
> - arq returns
> {noformat}
> WARN NodeValue :: Datatype format exception: "02022-01-02"^^xsd:date
> {noformat}
> But according to https://en.wikipedia.org/wiki/ISO_8601#Years, one can use
> more than 4 digits (to accommodate years >10000).
> Negative years are also allowed, but sparql.org returns UNDEF for comparison
> of "-2022-01-02"^^xsd:dateTime
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