Saxon

I notice differences in collation dependent sorts whether I use the UCA URI or the legacy Saxon URI.

The documentation at https://www.saxonica.com/html/documentation12/localization/sorting-and-collations.html says about collations

For backwards compatibility reasons the standard collation resolver in Saxon also accepts URIs in the form http://saxon.sf.net/collation followed by query parameters; the query parameters that are recognized are the same as those defined by W3C UCA collation URIs.

It appears to me, however, that with EE, the use of the legacy collation URI means ICU is not used, only the default JDK collation support, as I get results similar to using HE.

Can anyone confirm that?

Details below:

An XQuery program using the UCA collation URI, run with Saxon 12.4 EE, gives the same result for all sorts, e.g. the following program outputs true:

declare namespace array = "http://www.w3.org/2005/xpath-functions/array";

declare namespace output = "http://www.w3.org/2010/xslt-xquery-serialization";

declare option output:method 'text';

declare option output:item-separator '
';

declare variable $strings as array(xs:string*) external := [
  ('abc', 'abc def', 'abcdef'),
  ('abc', 'abcdef', 'abc def'),
  ('abc def', 'abcdef', 'abc'),
  ('abc def', 'abc', 'abcdef'),
  ('abcdef', 'abc', 'abc def'),
  ('abcdef', 'abc def', 'abc')
];

let $sorted := 
  array:for-each(
    $strings, 
    function($seq) { 
      sort($seq, 'http://www.w3.org/2013/collation/UCA?strength=primary;lang=en')
    })
return
  every $pos in (1 to array:size($sorted))
  satisfies 
    deep-equal($sorted($pos), $strings?1)

The same program using the legacy Saxon collation URI, however, gives different sort result, much like Saxon HE, e.g. the program outputs false:

declare namespace array = "http://www.w3.org/2005/xpath-functions/array";

declare namespace output = "http://www.w3.org/2010/xslt-xquery-serialization";

declare option output:method 'text';

declare option output:item-separator '
';

declare variable $strings as array(xs:string*) external := [
  ('abc', 'abc def', 'abcdef'),
  ('abc', 'abcdef', 'abc def'),
  ('abc def', 'abcdef', 'abc'),
  ('abc def', 'abc', 'abcdef'),
  ('abcdef', 'abc', 'abc def'),
  ('abcdef', 'abc def', 'abc')
];

let $sorted := 
  array:for-each(
    $strings, 
    function($seq) { 
      sort($seq, 'http://saxon.sf.net/collation?strength=primary;lang=en')
    })
return
  every $pos in (1 to array:size($sorted))
  satisfies 
    deep-equal($sorted($pos), $strings?1)