On 15/11/2020 12:32, Ihe Onwuka wrote:
xquery version "3.1";
let $schemaCollection := "/db/apps/schemas"
return
collection($schemaCollection)/xs:schema/distinct-values(@targetNamespace)
does not eliminate duplicates
xquery version "3.1";
let $schemaCollection := "/db/apps/schemas"
return collection($schemaCollection)/xs:schema/@targetNamespace =>
distinct-values()
does.
I checked this in Saxon and exist-db XQuery, both return the same
results so this may be how it's supposed to work but I don't get it.
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distinct-values(@targetNamespace)
returns the input sequence with duplicates (by value) removed but
@targetNamespace only selects at most one attribute so distinct-values
will do nothing.
$schemaCollection)/xs:schema/@targetNamespace => distinct-values()
or
distinct-values($schemaCollection)/xs:schema/@targetNamespace)
here you first make the sequence of all the @targetNamespace then remove
duplicates.
David
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