resolve-uri() fails when it should not

[drmacro]

Given this document in a repo named "uri-test" at the location "/docs/doc02.xml":

<doc xml:base="foo/bar/">
      <link href="doc2.xml"/>
    </doc>

and this query run from the admin panel:

let $uri := 'uri-test/docs/doc-01.xml'
let $doc1 := collection('uri-test/docs/doc-01.xml')
let $doc2 := doc($uri)
let $doc3 := doc('uri-test/docs/doc02.xml')
let $link := $doc3/*/link
let $baseURI := base-uri($link)
let $resolvedURI := resolve-uri($baseURI, string($link/@href))

return<result>
<doc1>{
$doc1
}</doc1>
<doc2>{
$doc2
}</doc2>
<doc3>{
$doc3
}</doc3>
<link-elem base-uri="{$baseURI}"
 resolved-uri="{$resolvedURI}"
>
{$link}
</link-elem>

</result>

I get this failure from resolve-uri():

Base URI is not absolute: "doc2.xml".

The problem is that document-uri() returns "uri-test/docs/doc02.xml", which is not an absolute URI.

But it needs to be one for the normal XPath functions that expect absolute URIs to work.

Either the built-in implementation of document-uri() needs to recognize this URI as being absolute (because it starts with the name of a repository) or, better, BaseX needs to provide a URL scheme that can be used in this case, e.g. "basex://uri-test/docs/doc02.xml".

Without this, there's no way to use normal URI-manipulation functions.

For example, I'm trying to use @xml:base to determine the effective URL for a relative reference made within the scope of the @xml:base, but that fails within BaseX because of this issue.

[ChristianGruen]

Moved to #1172