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https://issues.apache.org/jira/browse/JENA-2189?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Seaborne resolved JENA-2189.
---------------------------------
Fix Version/s: Jena 4.3.0
Assignee: Andy Seaborne
Resolution: Fixed
> some XPath registry and function names are wrong
> ------------------------------------------------
>
> Key: JENA-2189
> URL: https://issues.apache.org/jira/browse/JENA-2189
> Project: Apache Jena
> Issue Type: Bug
> Components: Jena
> Affects Versions: Jena 3.8.0, Jena 3.9.0, Jena 3.10.0, Jena 3.11.0, Jena
> 3.12.0, Jena 3.13.0, Jena 3.13.1, Jena 3.14.0, Jena 3.15.0, Jena 3.16.0, Jena
> 3.17.0, Jena 4.0.0, Jena 4.1.0, Jena 4.2.0
> Reporter: Peter Winstanley
> Assignee: Andy Seaborne
> Priority: Major
> Fix For: Jena 4.3.0
>
>
> I came across this when trying out some code on jena 4.2 on the tarql project
>
> [main] WARN org.apache.jena.arq.exec - URI
> <[http://www.w3.org/2005/xpath-functions#day-from-dateTime]> has no
> registered function factory
>
> I looked at
> [https://github.com/apache/jena/blob/main/jena-arq/src/main/java/org/apache/jena/sparql/function/StandardFunctions.java]
> and realised that a few functions aren't what they are described as in
> [https://www.w3.org/TR/xpath-functions-3/] . They appear to have a signature
> that uses the plural, whereas the XPath functions are singular:
>
> add(registry, xfn+"years-from-date", FN_YearsFromDate.class) ;
>
> [https://www.w3.org/TR/xpath-functions-3/#func-year-from-date]
> add(registry, xfn+"months-from-date", FN_MonthsFromDate.class)
> ;
> [https://www.w3.org/TR/xpath-functions-3/#func-month-from-date]
> add(registry, xfn+"days-from-date", FN_DaysFromDate.class) ;
>
> [https://www.w3.org/TR/xpath-functions-3/#func-day-from-date]
>
>
> add(registry, xfn+"years-from-dateTime",
> FN_YearsFromDateTime.class) ;
> [https://www.w3.org/TR/xpath-functions-31/#func-year-from-dateTime]
> add(registry, xfn+"months-from-dateTime",
> FN_MonthsFromDateTime.class) ;
> [https://www.w3.org/TR/xpath-functions-3/#func-month-from-dateTime]
> add(registry, xfn+"days-from-dateTime",
> FN_DaysFromDateTime.class) ;
> [https://www.w3.org/TR/xpath-functions-3/#func-day-from-dateTime]
>
>
>
>
> When I used the incorrect XPath function signature "days-from-dateTime()" the
> result was calculated as expected and there was no warning error message as
> above.
>
> When using the distribution of Tarql 1.2 (which, afaik, used Jena 3.11) I
> only got the following error:
> WARN URI <[http://www.w3.org/2005/xpath-functions#days-from-dateTime]> has
> no registered function factory
> and using "day-from-dateTime()" worked correctly. I looked into this by
> opening the jar and found that the function was correct there:
>
> ;org/apache/jena/sparql/function/library/FN_YearFromDateTime
> month-from-dateTime
> <org/apache/jena/sparql/function/library/FN_MonthFromDateTime
> day-from-dateTime :org/apache/jena/sparql/function/library/FN_DayFromDateTime
>
>
> So, it looks like a long-standing error that has been corrected at some point
> in the generation of the jars for the distro of Tarql 1.2
>
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