afs commented on issue #2619:
URL: https://github.com/apache/jena/issues/2619#issuecomment-2267650165
jena4 doesn't seem to write it as an RDF XMLLiteral - it's using
`rdf:datatype` not `rdf:parseType="Literal"`
I suspect it is because the implementation of the datatype has changed. It's
an illegal RDF XMLLIteral in RDF 1.0
If namespaces are set it work as a `rdf:parseType="Literal"` in jena5
I suspect it is because Jena 5.1.0 has the RDF 1.1 definition of RDF XML
Literal.
Jena 4.10 had the RDF 1.0 definition.
Try this, then change the literal to "<ns:text>ABC" - not handling an
illegal rdf:XMLliteral properly.
```java
public static void main(String... args) {
String literal = "<ns:text>ABC</ns:text>";
var m = ModelFactory.createDefaultModel();//createOntologyModel();
m.createResource().addProperty(RDFS.comment,
m.createTypedLiteral(literal, RDF.dtXMLLiteral));
m.setNsPrefix("ns", "http://example/";);
System.out.println("---- Lang.TTL");
RDFWriter.source(m).lang(Lang.TTL).output(System.out);
System.out.println("---- model - rdf/xml");
m.write(System.out, "rdf/xml");
System.out.println("---- RDFFormat.RDFXML_ABBREV");
RDFWriter.source(m).format(RDFFormat.RDFXML_ABBREV).output(System.out);
System.out.println("---- RDFFormat.RDFXML_PLAIN");
RDFWriter.source(m).format(RDFFormat.RDFXML_PLAIN).output(System.out);
System.out.println("----");
StringWriter sw = new StringWriter();
m.write(sw, "rdf/xml");
System.out.println(sw);
StringReader sr = new StringReader(sw.toString());
ModelFactory.createDefaultModel().read(sr, null, "rdf/xml");
System.out.println("---- done");
}
```
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