Well if the instance data does not match the schema, then it's a problem :)
What you could do is add a step with SPARQL CONSTRUCT query that transforms datatype-less data into valid data. Something like this (untested): PREFIX cp: <http://...> PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> CONSTRUCT { ?s ?p ?o . ?s cp:class.attribute ?attrWithDT . } { # copy over unchanged triples (identity transform) { ?s ?p ?o . FILTER (?p NOT IN (cp:class.attribute)) } UNION # fix values of certain properties, e.g. add datatype { ?s cp:class.attribute ?o . BIND (xsd:float(?o) AS ?attrWithDT) } } You can keep adding more UNION branches and FILTER IN values. On Tue, Nov 26, 2019 at 10:33 PM Dr. Chavdar Ivanov <[email protected]> wrote: > > Thanks, > Do I understand correct that in case the syntax of the XML is > <cp: class.attribute >650.000000</cp: class.attribute> … > > There is no way to get other than string even if the datatypes information is > available in a RDF scheme > I was thinking that RDF schema can be somehow considered at the read activity > or as a second step > > > > -----Original Message----- > From: Martynas Jusevičius <[email protected]> > Sent: Tuesday, November 26, 2019 10:21 PM > To: jena-users-ml <[email protected]> > Subject: Re: XML Model read and datatypes > > @cp:class.attribute "650.000000"; > > is also a string. > > In Turtle, typed literals need a datatype: > > @cp:class.attribute "650.000000"^^xsd:float; > > The spec: https://www.w3.org/TR/turtle/#abbrev > > In RDF/XML, that would be > > <cp: class.attribute > rdf:datatype="http://www.w3.org/2001/XMLSchema#float";>650.000000</cp: > class.attribute> > > On Tue, Nov 26, 2019 at 9:55 PM Dr. Chavdar Ivanov <[email protected]> > wrote: > > > > Dear all, > > > > When I read an xml I see that all values are read as strings. It > > doesn’t matter if they are stings, integers, float, etc > > > > I read a XML file using this > > RDFDataMgr.read(model, new FileInputStream(file), "http://myNs1#";, > > Lang.RDFXML); > > > > And in the xml I have > > … > > <cp: class.attribute >650.000000</cp: class.attribute> … > > > > In the model when I browse I see > > … @cp:class.attribute "650.000000";… > > > > > > Is there a way to read the xml and parse the values in their proper form, > > e.g. float, string, …? > > > > Regards > > Chavdar
