如何在Node.js中使用rdflib.js或rdf-parser-rdfxml来parsingRDF / XML
我想读取一个rdf / xml文件，并可能以JSON或JavaScript对象或任何其他格式parsing它。 我尝试search很多节点库，但找不到任何好的例子。 所有提供一些API没有适当的文件（或他们给了，但我没有正确理解）。 这是我试过的东西。
var fs = require('fs'), rdfParser = require('rdf-parser-rdfxml'); var res=rdfParser(__dirname+'/1.xml'); console.log(res); 这里是1.xml文件
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:oneM2M="http://www.onem2m.org/ontology/Base_Ontology#" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:cfso="http://203.254.173.81:8080/ontologies/ConnectedFarmServiceOntology.owl#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <oneM2M:Thing rdf:about="http://203.254.173.81:8080/ontologies/ConnectedFarmServiceOntology.owl#KETICF"> <cfso:hasSpecies> <cfso:Species rdf:about="http://203.254.173.81:8080/ontologies/ConnectedFarmServiceOntology.owl#Type1"/> </cfso:hasSpecies> <cfso:hasSPName> <cfso:SPName rdf:about="http://203.254.173.81:8080/ontologies/ConnectedFarmServiceOntology.owl#Maxfor"/> </cfso:hasSPName> <cfso:hasLocation> <cfso:Location rdf:about="http://203.254.173.81:8080/ontologies/ConnectedFarmServiceOntology.owl#Buyeo"/> </cfso:hasLocation> <cfso:hasCropName> <cfso:CropName rdf:about="http://203.254.173.81:8080/ontologies/ConnectedFarmServiceOntology.owl#CharryTomato"> <cfso:hasSpecies rdf:resource="http://203.254.173.81:8080/ontologies/ConnectedFarmServiceOntology.owl#Type1"/> </cfso:CropName> </cfso:hasCropName> <cfso:hasControlMode> <cfso:ControlMode rdf:about="http://203.254.173.81:8080/ontologies/ConnectedFarmServiceOntology.owl#A"/> </cfso:hasControlMode> </oneM2M:Thing> </rdf:RDF>
我也用rdflib.js以非常相似的方式尝试。
var fs = require('fs'), $rdf = require('rdflib'); //var parser = new xml2js.Parser(); fs.readFile(__dirname + '/1.xml', function(err, data) { // Fetch data via a regular AJAX call, load from a file, or pass in a literal // string. In this example, it was loaded from 'https://fred.me/profile' var store = $rdf.graph() // Init a new empty graph var contentType = 'application/rdf+xml' var baseUrl = "" var parsedGraph = $rdf.parse(data, store, baseUrl, contentType); $rdf.parse(data,function(triples){ for (var i in triples){ console.log(triples[i]); } }) });
帮助我一个人:)提前Thanx
我发现fs.readFile返回的是Object而不是String。 所以修改源是在这里：
var fs = require('fs'), $rdf = require('rdflib'); var rdfData=fs.readFileSync(__dirname+'/1.xml').toString(); var store=$rdf.graph(); var contentType='application/rdf+xml'; var baseUrl="http://IoFTriples.com"; try{ $rdf.parse(rdfData,store,baseUrl,contentType); var stms = store.statementsMatching(undefined, undefined , undefined); for (var i=0; i<stms.length;i++) { var stm = stms[i] console.log(stm) // the WebID of a friend } } catch(err){ console.log(err); }