awwright / node-rdf Goto Github PK

How can I export a Graph as n3 or NT?

Hello,

I would like to know if exists some function to print the profile,
I want to reconstruct the complete turtle file based on a graph I know how to print the triples
and create a string variable, but I don't find the way to print in the top of the file the prefix.

Say I've got a graph that refers to a blank node object "b1". How do I query for triples where "b1" is the subject?

<#me>
  a foaf:Person;
  cert:key [                             # the object here is blank node "b1"
    a cert:RSAPublicKey;       # these are the triples I want to find
    cert:exponent 65537;
    cert:modulus "..."
  ].

The closest I can seem to get is graph.match("_:b1", null, null), which at least recognizes that I'm looking for a blank node, but throws with "unexpected BlankNode syntax". I can also find triples related to the predicate with graph.match(null, "cert:exponent", null), but that still requires that I manually filter for the subject I'm looking for.

Hi,

I try to use the "Builtins" feature of node-rdf to make the resulting code more readable, but I cannot create a triple by simply calling rdfEnvironment.createTriple(string, string, string) -- this triggers an error because the Triple constructor checks the type of the arguments (cf. RDFNode.js:29ff). Is this intended? Am I using the "Builtins" feature wrong? Or should this be possible? Is there another way how I can create a triple with the "Builtins" feature?

Kind regards,
Chris

if namespace uri's are overlapping, like in the example below, PrefixMap.shrink sometime returns incorrect results, depending on the order of namespace declarations, e.g.

@Prefix xmp: http://ns.adobe.com/xap/1.0/ .
@Prefix xmpMM: http://ns.adobe.com/xap/1.0/mm/ .
@Prefix xmpRights: http://ns.adobe.com/xap/1.0/rights/ .

turtleParser.environment.prefixes.shrink('http://ns.adobe.com/xap/1.0/mm/DocumentID') -> 'xmp:mm/DocumentID' instead of 'xmpMM:DocumentID'

Turtle files with datatypes written with prefixes, eg: "1"^^xsd:number are not expanded to "http://www.w3.org/2001/XMLSchema#number" when parsing.

What I'm doing

let graph = env.createGraph();
let turtleParser = new rdf.TurtleParser();
turtleParser.parse(rdfText, function () {
    graph.forEach(triple => {
        console.log(triple.object.datatype);
    })
}, "", null, graph);

Example turtle

@prefix sh: <http://www.w3.org/ns/shacl#>.
@prefix : <http://example.com/>.
@prefix xsd: <http://www.w3.org/2001/XMLSchema#>.

:person1 :age "1"^^xsd:number .

:person1 a :Person.

Prints

xsd:number

Should print

http://www.w3.org/2001/XMLSchema#number

Hi,

I've installed node-rdf via npm and encountered that the latest release there does not implement graph.removeMatches yet .. Could you release the latest commit as version to npm? Thanks.

Kind regards,
Chris

TripletGraph seems to have disappeared when I install from npm. Roughly:

$ npm install rdf
$ node
> rdf = require('rdf')
> rdf.TripletGraph
undefined

Hello there I was trying to find the package.json, but I could not find it! Is it on github?

is there a way to create docstrings ( i.e. literals with triple quotes) when using built-in mode?
I would like to have string.l() which returns """ value """