Recommendations for vocabulary metadata description

An error occurred:

org.apache.jena.atlas.AtlasException: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated at org.apache.jena.atlas.io.IO.exception(IO.java:199) at org.apache.jena.riot.web.HttpOp.execHttpGet(HttpOp.java:179) at org.apache.jena.riot.stream.LocatorURL.open(LocatorURL.java:47) at org.apache.jena.riot.stream.StreamManager.openNoMapOrNull(StreamManager.java:124) at org.apache.jena.riot.stream.StreamManager.open(StreamManager.java:81) at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:725) at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:714) at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:649) at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:211) at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:104) at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:95) at org.apache.jena.riot.RDFDataMgr.loadModel(RDFDataMgr.java:331) at org.lov.LovBotVocabAnalyser.analyse(LovBotVocabAnalyser.java:58) at org.lov.LovBotVocabAnalyser.analyseVocabURI(LovBotVocabAnalyser.java:48) at org.lov.cli.Suggest.exec(Suggest.java:71) at arq.cmdline.CmdMain.mainMethod(CmdMain.java:101) at arq.cmdline.CmdMain.mainRun(CmdMain.java:63) at arq.cmdline.CmdMain.mainRun(CmdMain.java:50) at org.lov.cli.Suggest.main(Suggest.java:27) Caused by: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated at sun.security.ssl.SSLSessionImpl.getPeerCertificates(SSLSessionImpl.java:579) at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:126) at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:572) at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180) at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:294) at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:645) at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:480) at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906) at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805) at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:784) at org.apache.jena.riot.web.HttpOp.execHttpGet(HttpOp.java:148) ... 17 more