Metacat

/**

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

package edu.ucsb.nceas.metacat.index.annotation;

import edu.ucsb.nceas.metacat.index.resourcemap.ResourceMapSubprocessor;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.net.URI;

import java.net.URISyntaxException;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Set;

import javax.xml.xpath.XPathExpressionException;

import org.apache.commons.codec.EncoderException;

import org.apache.commons.io.IOUtils;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.dataone.cn.index.util.PerformanceLogger;

import org.dataone.cn.indexer.annotation.SparqlField;

import org.dataone.cn.indexer.annotation.TripleStoreService;

import org.dataone.cn.indexer.parser.IDocumentSubprocessor;

import org.dataone.cn.indexer.parser.ISolrDataField;

import org.dataone.cn.indexer.parser.SubprocessorUtility;

import org.dataone.cn.indexer.solrhttp.HTTPService;

import org.dataone.cn.indexer.solrhttp.SolrDoc;

import org.dataone.cn.indexer.solrhttp.SolrElementField;

import org.springframework.beans.factory.annotation.Autowired;

import com.hp.hpl.jena.ontology.OntModel;

import com.hp.hpl.jena.query.Dataset;

import com.hp.hpl.jena.query.Query;

import com.hp.hpl.jena.query.QueryExecution;

import com.hp.hpl.jena.query.QueryExecutionFactory;

import com.hp.hpl.jena.query.QueryFactory;

import com.hp.hpl.jena.query.QuerySolution;

import com.hp.hpl.jena.query.ResultSet;

import com.hp.hpl.jena.rdf.model.ModelFactory;

import com.hp.hpl.jena.tdb.TDBFactory;

/**

 * A solr index parser for an RDF/XML file.

 * The solr doc of the RDF/XML object only has the system metadata information.

 * The solr docs of the science metadata doc and data file have the annotation information.

 */

public class MetacatRdfXmlSubprocessor implements IDocumentSubprocessor {

    private static Log log = LogFactory.getLog(MetacatRdfXmlSubprocessor.class);

    private static PerformanceLogger perfLog = PerformanceLogger.getInstance();

    /**

     * If xpath returns true execute the processDocument Method

     */

    private List<String> matchDocuments = null;

    private List<ISolrDataField> fieldList = new ArrayList<ISolrDataField>();

    private List<String> fieldsToMerge = new ArrayList<String>();

    @Autowired

    private HTTPService httpService = null;

    @Autowired

    private String solrQueryUri = null;

    @Autowired

    private SubprocessorUtility processorUtility;

    /**

     * Returns true if subprocessor should be run against object

     * 

     * @param formatId the the document to be processed

     * @return true if this processor can parse the formatId

     */

    public boolean canProcess(String formatId) {

        return matchDocuments.contains(formatId);

    }

    public List<String> getMatchDocuments() {

        return matchDocuments;

    }

    public void setMatchDocuments(List<String> matchDocuments) {

        this.matchDocuments = matchDocuments;

    }

    public List<ISolrDataField> getFieldList() {

        return fieldList;

    }

    public void setFieldList(List<ISolrDataField> fieldList) {

        this.fieldList = fieldList;

    }

    @Override

    public Map<String, SolrDoc> processDocument(String identifier, Map<String, SolrDoc> docs,

            InputStream is) throws Exception {

        if (log.isTraceEnabled()) {

            log.trace("INCOMING DOCS to processDocument(): ");

            serializeDocuments(docs);

        }

        SolrDoc resourceMapDoc = docs.get(identifier);

        List<SolrDoc> processedDocs = process(resourceMapDoc, is);

        Map<String, SolrDoc> processedDocsMap = new HashMap<String, SolrDoc>();

        for (SolrDoc processedDoc : processedDocs) {

            processedDocsMap.put(processedDoc.getIdentifier(), processedDoc);

        }

        if (log.isTraceEnabled()) {

            log.trace("PREMERGED DOCS from processDocument(): ");

            serializeDocuments(processedDocsMap);

        }

        // Merge previously processed (but yet to be indexed) documents

        Map<String, SolrDoc> mergedDocs = mergeDocs(docs, processedDocsMap);

        if (log.isTraceEnabled()) {

            log.trace("OUTGOING DOCS from processDocument(): ");

            serializeDocuments(mergedDocs);

        }

        return mergedDocs;

    }

    /**

     * Serialize documents to be indexed for debugging

     * 

     * @param docs

     * @throws IOException

     */

    private void serializeDocuments(Map<String, SolrDoc> docs) {

        StringBuilder documents = new StringBuilder();

        documents.append("<docs>");

        for (SolrDoc doc : docs.values()) {

            ByteArrayOutputStream baos = new ByteArrayOutputStream();

            try {

                doc.serialize(baos, "UTF-8");

            } catch (IOException e) {

                log.trace("Couldn't serialize documents: " + e.getMessage());

            }

            try {

                documents.append(baos.toString());

            } finally {

                IOUtils.closeQuietly(baos);

            }

        }

        documents.append("</docs>");

        log.trace(documents.toString());

    }

    private List<SolrDoc> process(SolrDoc indexDocument, InputStream is) throws Exception {

        // get the triplestore dataset

        long start = System.currentTimeMillis();

        Dataset dataset = TripleStoreService.getInstance().getDataset();

        perfLog.log("RdfXmlSubprocess.process gets a dataset from tripe store service ", System.currentTimeMillis() - start);

        // read the annotation

        String indexDocId = indexDocument.getIdentifier();

        String name = indexDocId;

        //Check if the identifier is a valid URI and if not, make it one by prepending "http://"

        URI nameURI;

        String scheme = null;

        try {

            nameURI = new URI(indexDocId);

            scheme = nameURI.getScheme();

        } catch (URISyntaxException use) {

            // The identifier can't be parsed due to offending characters. It's not a URL

            name = "https://cn.dataone.org/cn/v1/resolve/"+indexDocId;

        }

        // The had no scheme prefix. It's not a URL

        if ((scheme == null) || (scheme.isEmpty())) {

            name = "https://cn.dataone.org/cn/v1/resolve/"+indexDocId;

        }

        long startOntModel = System.currentTimeMillis();

        boolean loaded = dataset.containsNamedModel(name);

        if (!loaded) {

            OntModel ontModel = ModelFactory.createOntologyModel();

            ontModel.read(is, name);

            dataset.addNamedModel(name, ontModel);

        }

        perfLog.log("RdfXmlSubprocess.process adds ont-model ", System.currentTimeMillis() - startOntModel);

        //dataset.getDefaultModel().add(ontModel);

        // process each field query

        Map<String, SolrDoc> documentsToIndex = new HashMap<String, SolrDoc>();

        long startField = System.currentTimeMillis();

        for (ISolrDataField field : this.fieldList) {

            long filed = System.currentTimeMillis();

            String q = null;

            if (field instanceof SparqlField) {

                q = ((SparqlField) field).getQuery();

                q = q.replaceAll("\\$GRAPH_NAME", name);

                Query query = QueryFactory.create(q);

                log.trace("Executing SPARQL query:\n" + query.toString());

                QueryExecution qexec = QueryExecutionFactory.create(query, dataset);

                ResultSet results = qexec.execSelect();

                while (results.hasNext()) {

                    SolrDoc solrDoc = null;

                    QuerySolution solution = results.next();

                    log.trace(solution.toString());

                    // find the index document we are trying to augment with the annotation

                    if (solution.contains("pid")) {

                        String id = solution.getLiteral("pid").getString();

                        // TODO: check if anyone with permissions on the annotation document has write permission on the document we are annotating

                        boolean statementAuthorized = true;

                        if (!statementAuthorized) {

                            continue;

                        }

                        // otherwise carry on with the indexing

                        solrDoc = documentsToIndex.get(id);

                        if (solrDoc == null) {

                            solrDoc = new SolrDoc();

                            solrDoc.addField(new SolrElementField(SolrElementField.FIELD_ID, id));

                            documentsToIndex.put(id, solrDoc);

                        }

                    }

                    // add the field to the index document

                    if (solution.contains(field.getName())) {

                        String value = solution.get(field.getName()).toString();

                        SolrElementField f = new SolrElementField(field.getName(), value);

                        if (!solrDoc.hasFieldWithValue(f.getName(), f.getValue())) {

                            solrDoc.addField(f);

                        }

                    }

                }

            }

            perfLog.log("RdfXmlSubprocess.process process the field "+field.getName(), System.currentTimeMillis() - filed);

        }

        perfLog.log("RdfXmlSubprocess.process process the fields total ", System.currentTimeMillis() - startField);

        // clean up the triple store

        TDBFactory.release(dataset);

        // merge the existing index with the new[er] values

        long getStart = System.currentTimeMillis();

        Map<String, SolrDoc> existingDocuments = getSolrDocs(documentsToIndex.keySet());

        perfLog.log("RdfXmlSubprocess.process get existing solr docs ", System.currentTimeMillis() - getStart);

        Map<String, SolrDoc> mergedDocuments = mergeDocs(documentsToIndex, existingDocuments);

        mergedDocuments.put(indexDocument.getIdentifier(), indexDocument);

        perfLog.log("RdfXmlSubprocess.process() total take ", System.currentTimeMillis() - start);

        return new ArrayList<SolrDoc>(mergedDocuments.values());

    }

    private Map<String, SolrDoc> getSolrDocs(Set<String> ids) throws Exception {

        Map<String, SolrDoc> list = new HashMap<String, SolrDoc>();

        if (ids != null) {

            for (String id : ids) {

                //SolrDoc doc = httpService.retrieveDocumentFromSolrServer(id, solrQueryUri);

                SolrDoc doc = ResourceMapSubprocessor.getSolrDoc(id);;

                if (doc != null) {

                    list.put(id, doc);

                }

            }

        }

        return list;

    }

    /*

     * Merge existing documents from the Solr index with pending documents

     */

    private Map<String, SolrDoc> mergeDocs(Map<String, SolrDoc> pending,

            Map<String, SolrDoc> existing) throws Exception {

        long start = System.currentTimeMillis();

        Map<String, SolrDoc> merged = new HashMap<String, SolrDoc>();

        Iterator<String> pendingIter = pending.keySet().iterator();

        while (pendingIter.hasNext()) {

            String id = pendingIter.next();

            SolrDoc pendingDoc = pending.get(id);

            SolrDoc existingDoc = existing.get(id);

            SolrDoc mergedDoc = new SolrDoc();

            if (existingDoc != null) {

                // merge the existing fields

                for (SolrElementField field : existingDoc.getFieldList()) {

                    mergedDoc.addField(field);

                }

            }

            // add the pending

            for (SolrElementField field : pendingDoc.getFieldList()) {

                if (field.getName().equals(SolrElementField.FIELD_ID)

                        && mergedDoc.hasField(SolrElementField.FIELD_ID)) {

                    continue;

                }

                // only add if we don't already have it

                if (!mergedDoc.hasFieldWithValue(field.getName(), field.getValue())) {

                    mergedDoc.addField(field);

                }

            }

            // include in results

            merged.put(id, mergedDoc);

        }

        // add existing if not yet merged (needed if existing map size > pending map size)

        Iterator<String> existingIter = existing.keySet().iterator();

        while (existingIter.hasNext()) {

            String existingId = existingIter.next();

            if (!merged.containsKey(existingId)) {

                merged.put(existingId, existing.get(existingId));

            }

        }

        if (log.isTraceEnabled()) {

            log.trace("MERGED DOCS with existing from the Solr index: ");

            serializeDocuments(merged);

        }

        perfLog.log("RdfXmlSubprocess.merge total ", System.currentTimeMillis() - start);

        return merged;

    }

    @Override

    public SolrDoc mergeWithIndexedDocument(SolrDoc indexDocument) throws IOException,

            EncoderException, XPathExpressionException {

        return processorUtility.mergeWithIndexedDocument(indexDocument, fieldsToMerge);

    }

    public List<String> getFieldsToMerge() {

        return fieldsToMerge;

    }

    public void setFieldsToMerge(List<String> fieldsToMerge) {

        this.fieldsToMerge = fieldsToMerge;

    }

}

	<bean id="rdfXmlSubprocessor" class="edu.ucsb.nceas.metacat.index.annotation.MetacatRdfXmlSubprocessor">

package edu.ucsb.nceas.metacat.index.annotation;

import static org.junit.Assert.assertTrue;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStream;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Set;

import org.dataone.cn.indexer.parser.IDocumentSubprocessor;

import org.dataone.cn.indexer.solrhttp.SolrDoc;

import org.dataone.cn.indexer.solrhttp.SolrElementField;

import org.junit.Test;

import org.dataone.cn.indexer.annotation.RdfXmlSubprocessor;

import edu.ucsb.nceas.metacat.index.SolrIndex;

import edu.ucsb.nceas.metacat.index.SolrIndexIT;

public class MetacatRdfXmlSubprocessorTest {

    /**

     * Test the case that the resource map contains a component which is not int the solr index server.

     * @throws Exception

     */

    @Test

    public void testProcessDocument() throws Exception {

        //Settings.getConfiguration().setProperty("dataone.hazelcast.configFilePath", "../lib/hazelcast.xml");

        String id = "resourceMap_urn:uuid:04780847-6082-455b-9831-22269c9ec0a6";

        InputStream is = getResourceMapDoc();

        List<SolrElementField> sysSolrFields = new ArrayList<SolrElementField>();

        SolrElementField idField = new SolrElementField();

        idField.setName("id");

        idField.setValue(id);

        sysSolrFields.add(idField);

        SolrDoc indexDocument = new SolrDoc(sysSolrFields);

        Map<String, SolrDoc> docs = new HashMap<String, SolrDoc>();

        docs.put(id, indexDocument);

        MetacatRdfXmlSubprocessor processor = getMetacatRdfXmlSubprocessor();

        try {

            Map<String, SolrDoc> result = processor.processDocument(id, docs, is);

            Set<String> ids = result.keySet();

            for(String newId: ids) {

                SolrDoc resultSolrDoc = result.get(newId);

                if(newId.equals("urn:uuid:2c20432e-116a-4085-b8d6-abfc4b2dada2")){

                    SolrElementField field1 = resultSolrDoc.getField("wasDerivedFrom");

                    assertTrue(" the wasDerivedFrom value should be urn:uuid:621a115f-f1ed-4bef-bca5-f8741793a540. But the real value is "+field1.getValue(), field1.getValue().equals("urn:uuid:621a115f-f1ed-4bef-bca5-f8741793a540"));

                    SolrElementField field2 = resultSolrDoc.getField("wasGeneratedBy");

                    assertTrue("the wasGeneratedBy value should be urn:uuid:9ceeaeb3-6ef3-4b1e-bc4d-96e299fab3a4. But the real value is"+field2.getValue(), field2.getValue().equals("urn:uuid:9ceeaeb3-6ef3-4b1e-bc4d-96e299fab3a4"));

                } else if (newId.equals("urn:uuid:9ceeaeb3-6ef3-4b1e-bc4d-96e299fab3a4")) {

                    SolrElementField field1 = resultSolrDoc.getField("used");

                    assertTrue(" the used value should be urn:uuid:621a115f-f1ed-4bef-bca5-f8741793a540. But the real value is "+field1.getValue(), field1.getValue().equals("urn:uuid:621a115f-f1ed-4bef-bca5-f8741793a540"));

                } else if (newId.equals("urn:uuid:621a115f-f1ed-4bef-bca5-f8741793a540")) {

                    List<String>list = resultSolrDoc.getAllFieldValues("wasDerivedFrom");

                    assertTrue("The list must contain urn:uuid:ee635a61-c930-444d-8214-db65178a1a47", list.contains("urn:uuid:ee635a61-c930-444d-8214-db65178a1a47"));

                    assertTrue("The list must contain urn:uuid:23495598-d50b-4317-b0e1-05a9d9e52632", list.contains("urn:uuid:23495598-d50b-4317-b0e1-05a9d9e52632"));

                    assertTrue("The list must contain urn:uuid:urn:uuid:672ba6c5-8812-4c05-a324-246af172c67a", list.contains("urn:uuid:672ba6c5-8812-4c05-a324-246af172c67a"));

                    assertTrue("The list must contain urn:uuid:e534b2ab-3a1b-44ed-8a99-ce54a0487aea", list.contains("urn:uuid:e534b2ab-3a1b-44ed-8a99-ce54a0487aea"));

                    list = resultSolrDoc.getAllFieldValues("wasGeneratedBy");

                    assertTrue("The list must contain urn:uuid:d8e46217-2650-42b2-896f-0f006b1a2d3b", list.contains("urn:uuid:d8e46217-2650-42b2-896f-0f006b1a2d3b"));

                } else if (newId.equals("urn:uuid:a0e104da-c925-4765-af60-29310de1b99a")) {

                    List<String>list = resultSolrDoc.getAllFieldValues("wasGeneratedBy");

                    assertTrue("The list must contain urn:uuid:9ceeaeb3-6ef3-4b1e-bc4d-96e299fab3a4", list.contains("urn:uuid:9ceeaeb3-6ef3-4b1e-bc4d-96e299fab3a4"));

                }  else if (newId.equals("urn:uuid:d8e46217-2650-42b2-896f-0f006b1a2d3b")) {

                    List<String>list = resultSolrDoc.getAllFieldValues("used");

                    assertTrue("The list must contain urn:uuid:ee635a61-c930-444d-8214-db65178a1a47", list.contains("urn:uuid:ee635a61-c930-444d-8214-db65178a1a47"));

                    assertTrue("The list must contain urn:uuid:23495598-d50b-4317-b0e1-05a9d9e52632", list.contains("urn:uuid:23495598-d50b-4317-b0e1-05a9d9e52632"));

                    assertTrue("The list must contain urn:uuid:672ba6c5-8812-4c05-a324-246af172c67a", list.contains("urn:uuid:672ba6c5-8812-4c05-a324-246af172c67a"));

                    assertTrue("The list must contain urn:uuid:e534b2ab-3a1b-44ed-8a99-ce54a0487aea", list.contains("urn:uuid:e534b2ab-3a1b-44ed-8a99-ce54a0487aea"));

                }

                /*ByteArrayOutputStream baos = new ByteArrayOutputStream();

                resultSolrDoc.serialize(baos, "UTF-8");

                System.out.println("after process, the solr doc is \n"+baos.toString());*/

            }

        } catch (Exception e) {

            e.printStackTrace();

            assertTrue("It shouldn't throw an exception.", false);

        }

    }

    /*

     * Get the document format of the test resource map file 

     */

    private InputStream getResourceMapDoc() throws Exception{

    	File file = new File("src/test/resources/rdfxml-example.xml");

        InputStream is = new FileInputStream(file);

        return is;

    }

    /*

     * Get the ResourceMapSubprocessor

     */

    private MetacatRdfXmlSubprocessor getMetacatRdfXmlSubprocessor() throws Exception {

        MetacatRdfXmlSubprocessor resorceMapprocessor = null;

        SolrIndex solrIndex = SolrIndexIT.generateSolrIndex();

        List<IDocumentSubprocessor> processors = solrIndex.getSubprocessors();

        for(IDocumentSubprocessor processor : processors) {

            if(processor instanceof MetacatRdfXmlSubprocessor) {

                resorceMapprocessor = (MetacatRdfXmlSubprocessor) processor;

            }

        }

        return resorceMapprocessor;

    }

}

<?xml version="1.0" encoding="utf-8"?>

<rdf:RDF xmlns:cito="http://purl.org/spar/cito/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:ore="http://www.openarchives.org/ore/terms/" xmlns:prov="http://www.w3.org/ns/prov#" xmlns:provone="http://purl.dataone.org/provone/2015/01/15/ontology#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#">

  <rdf:Description rdf:about="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3A2c20432e-116a-4085-b8d6-abfc4b2dada2">

    <prov:wasGeneratedBy rdf:resource="https://cn.dataone.org/cn/v2/resolve/urn%3Auuid%3A9ceeaeb3-6ef3-4b1e-bc4d-96e299fab3a4"/>

  </rdf:Description>

  <rdf:Description rdf:about="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3A621a115f-f1ed-4bef-bca5-f8741793a540">

    <dcterms:identifier rdf:datatype="http://www.w3.org/2001/XMLSchema#string">urn:uuid:621a115f-f1ed-4bef-bca5-f8741793a540</dcterms:identifier>

  </rdf:Description>

  <rdf:Description rdf:about="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3A672ba6c5-8812-4c05-a324-246af172c67a">

    <rdf:type rdf:resource="http://purl.dataone.org/provone/2015/01/15/ontology#Data"/>

  </rdf:Description>

  <rdf:Description rdf:about="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3A21edffcf-70e9-43fb-829d-b5f8644f1a11">

    <dcterms:identifier rdf:datatype="http://www.w3.org/2001/XMLSchema#string">urn:uuid:21edffcf-70e9-43fb-829d-b5f8644f1a11</dcterms:identifier>

  </rdf:Description>

  <rdf:Description rdf:about="https://cn.dataone.org/cn/v2/resolve/urn%3Auuid%3A9ceeaeb3-6ef3-4b1e-bc4d-96e299fab3a4">

    <prov:used rdf:resource="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3A621a115f-f1ed-4bef-bca5-f8741793a540"/>

  </rdf:Description>

  <rdf:Description rdf:about="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3A621a115f-f1ed-4bef-bca5-f8741793a540">

    <prov:wasDerivedFrom rdf:resource="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3Aee635a61-c930-444d-8214-db65178a1a47"/>

  </rdf:Description>

  <rdf:Description rdf:about="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3A621a115f-f1ed-4bef-bca5-f8741793a540">

    <prov:wasDerivedFrom rdf:resource="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3Ae534b2ab-3a1b-44ed-8a99-ce54a0487aea"/>

  </rdf:Description>

  <rdf:Description rdf:about="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3A621a115f-f1ed-4bef-bca5-f8741793a540">

    <prov:wasDerivedFrom rdf:resource="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3A672ba6c5-8812-4c05-a324-246af172c67a"/>

  </rdf:Description>

  <rdf:Description rdf:about="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3A621a115f-f1ed-4bef-bca5-f8741793a540">

    <prov:wasDerivedFrom rdf:resource="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3A23495598-d50b-4317-b0e1-05a9d9e52632"/>

  </rdf:Description>

  <rdf:Description rdf:about="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3Ae534b2ab-3a1b-44ed-8a99-ce54a0487aea">

    <ore:isAggregatedBy rdf:resource="https://cn-stage-2.test.dataone.org/cn/v2/resolve/urn%3Auuid%3Ae029b6e4-be07-442b-a54e-2d0aca657294#aggregation"/>

  </rdf:Description>

  <rdf:Description rdf:about="https://cn.dataone.org/cn/v2/resolve/urn%3Auuid%3Ad8e46217-2650-42b2-896f-0f006b1a2d3b">

    <dcterms:identifier rdf:datatype="http://www.w3.org/2001/XMLSchema#string">urn:uuid:d8e46217-2650-42b2-896f-0f006b1a2d3b</dcterms:identifier>

  </rdf:Description>

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