[JENA-1463] RDF/XML parsing of file://hostname/ base URI miswrites URI

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Jena 3.0.1, Jena 3.1.0, Jena 3.1.1, Jena 3.2.0, Jena 3.3.0, Jena 3.4.0, Jena 3.5.0, Jena 3.6.0
• Fix Version/s: Jena 3.7.0
• Component/s: ARQ, RDF/XML
• Assignee: Andy Seaborne
• Reporter: Stian Soiland-Reyes
• Created: 11/Jan/18 18:32
• Updated: 09/Apr/18 21:52
• Resolved: 15/Jan/18 11:50

Description

Similar to JENA-1462, but there seems to be special handling of file: URLs in RDF/XML parsing, where parsing an RDF/XML file like:

<rdf:RDF
    xml:base="file://example.com/nested/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#">
  <rdf:Description rdf:about="foo.txt">
    <rdfs:seeAlso rdf:resource="/bar.txt"/>
  </rdf:Description>
</rdf:RDF>

using

RDFDataMgr.read(m, load("file-base.rdf"), Lang.RDFXML);

(Note, load() returns a InputStream, no explicit base)

it comes out wrongly as:

<file:///example.com/nested/foo.txt> <http://www.w3.org/2000/01/rdf-schema#seeAlso> <file:///example.com/bar.txt> .

Notice the hostname somehow became part of the path, now with a file:/// with no hostname.

*Note: *https://tools.ietf.org/html/rfc8089#section-2 says that file URIs can have a hostname, as well as the obvious hostname "localhost", this is typically used to address Windows shares no remote hosts.

Equivalent in Turtle parses fine:

@base <file://example.com/nested/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .

<foo.txt> rdfs:seeAlso </bar.txt> .

becomes:

<file://example.com/nested/foo.txt> <http://www.w3.org/2000/01/rdf-schema#seeAlso> <file://example.com/bar.txt> .

Equivalent RDF/XML without xml:base and passing file://example.com/nested/ as Base also fails:

RDFDataMgr.read(m, load("rel.rdf"), "file://example.com/nested/", Lang.RDFXML);

Issue Links

• relates to: JENA-1462 RDF/XML parsing fails on newer/provisional/private URI schemes in base URI
• links to: GitHub Pull Request #241