src/MetadataExtractorCron.sln

@@ -3,7 +3,9 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.1.32414.318
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MetadataExtractorCron", "MetadataExtractorCron\MetadataExtractorCron.csproj", "{B76A7422-1D0F-491F-B71C-D00E7C885C4A}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MetadataExtractorCron", "MetadataExtractorCron\MetadataExtractorCron.csproj", "{B76A7422-1D0F-491F-B71C-D00E7C885C4A}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenApiGeneratedConnector", "OpenApiGeneratedConnector\OpenApiGeneratedConnector.csproj", "{6FAAF00B-335B-4896-826F-06CA79CAA2E0}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -15,6 +17,10 @@ Global
 		{B76A7422-1D0F-491F-B71C-D00E7C885C4A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B76A7422-1D0F-491F-B71C-D00E7C885C4A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{B76A7422-1D0F-491F-B71C-D00E7C885C4A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6FAAF00B-335B-4896-826F-06CA79CAA2E0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6FAAF00B-335B-4896-826F-06CA79CAA2E0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6FAAF00B-335B-4896-826F-06CA79CAA2E0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6FAAF00B-335B-4896-826F-06CA79CAA2E0}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

src/MetadataExtractorCron/Extractors/CoscineMetadataExtractor.cs

+using Coscine.Configuration;
+using Coscine.Database.Models;
+using Coscine.Metadata;
+using Coscine.ResourceTypes;
+using Coscine.ResourceTypes.Base;
+using Coscine.ResourceTypes.Base.Models;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Model;
+using VDS.RDF.Query;
+using VDS.RDF;
+using MetadataExtractorCron.Util;
+using VDS.RDF.Parsing;
+using System.Globalization;
+using System.Security.Cryptography;
+
+namespace MetadataExtractorCron.Extractors;
+
+public class CoscineMetadataExtractor : IMetadataExtractor
+{
+    private readonly string _resourceUrlPrefix = "https://purl.org/coscine/resources";
+
+    private readonly IConfiguration _configuration;
+    private readonly DefaultApi _apiClient;
+
+    private readonly RdfStoreConnector _rdfStoreConnector;
+    private readonly MetadataGraphsCreator _metadataGraphsCreator;
+
+    private const string metadataExtractionVersionUrl = "https://purl.org/coscine/terms/metatadataextraction#version";
+    private const string dcatdistributionUrl = "http://www.w3.org/ns/dcat#distribution";
+    private const string partOfUri = "http://purl.org/dc/terms/isPartOf";
+    private const string aUri = "http://www.w3.org/1999/02/22-rdf-syntax-ns#type";
+    private const string dctermsModifiedUri = "http://purl.org/dc/terms/modified";
+    private const string rdfSourceUri = "http://www.w3.org/ns/ldp#RDFSource";
+    private const string trellisGraphUri = "http://www.trellisldp.org/ns/trellis#PreferServerManaged";
+
+    public CoscineMetadataExtractor()
+    {
+        _configuration = new ConsulConfiguration();
+        _apiClient = new DefaultApi(
+            _configuration.GetStringAndWait(
+                "coscine/local/metadataextractor/url",
+                "https://metadataextractor.otc.coscine.dev/"
+            )
+        );
+        _rdfStoreConnector = new RdfStoreConnector(_configuration.GetStringAndWait("coscine/local/virtuoso/additional/url"));
+        _metadataGraphsCreator = new MetadataGraphsCreator(_rdfStoreConnector);
+    }
+
+    public async Task PerformExtraction()
+    {
+        var modelVersion = await _apiClient.GetVersionWorkerAsync();
+        var version = modelVersion._Version;
+
+        var metadataExtractionModel = new MetadataExtractionModel();
+        var resourceModel = new ResourceModel();
+
+        foreach (var extraction in metadataExtractionModel.GetAllWhere((extration) => extration.Activated))
+        {
+            var resourceId = extraction.ResourceId;
+            Console.WriteLine($"Working on resource {resourceId}");
+            var resource = resourceModel.GetByIdIncludingDeleted(resourceId);
+
+            var resourceTypeDefinition = ResourceTypeFactory.Instance.GetResourceType(resource);
+            if (resourceTypeDefinition == null)
+            {
+                Console.WriteLine($"Broken resource type for resource {resourceId}");
+                continue;
+            }
+            var resourceTypeOptions = resourceModel.GetResourceTypeOptions(resourceId);
+
+            var fileInfos = await ReceiveAllFiles(resourceTypeDefinition, resourceId.ToString(), resourceTypeOptions);
+
+            foreach (var file in fileInfos.Where((fileInfo) => fileInfo.HasBody))
+            {
+                if (file.BodyBytes > 16 * 1000 * 1000)
+                {
+                    Console.WriteLine($"Skipping {file.Key} on {resourceId} since it has a too large byte size");
+                    continue;
+                }
+                Console.WriteLine($"Iterating over {file.Key} on {resourceId}");
+                CreateMetadataSetsIfDontExist(resourceId.ToString(), file, fileInfos);
+                if (!HasCurrentMetadataExtracted(resourceId.ToString(), file))
+                {
+                    Console.WriteLine($"Extracting metadata for {file.Key} on {resourceId}");
+                    try
+                    {
+                        var extractedMetadata = await ExtractMetadata(resourceId.ToString(), file, resourceTypeDefinition, resourceTypeOptions);
+                        await StoreExtractedMetadata(resourceId.ToString(), file, extractedMetadata, resourceTypeDefinition, resourceTypeOptions);
+                    }
+                    catch (Exception e)
+                    {
+                        Console.WriteLine($"Error extracting metadata for {file.Key} on {resourceId} with error message: {e.Message}, Inner: {(e.InnerException != null ? e.InnerException.Message : "none")}");
+                    }
+                }
+                else
+                {
+                    Console.WriteLine($"Metadata for {file.Key} on {resourceId} already exists");
+                }
+            }
+        }
+    }
+
+    private async Task<IEnumerable<ResourceEntry>> ReceiveAllFiles(BaseResourceType resourceTypeDefinition, string resourceId, Dictionary<string, string>? resourceTypeOptions, string path = "")
+    {
+        var fileInfos = new List<ResourceEntry>();
+        var currentFileInfos = await resourceTypeDefinition.ListEntries(resourceId, path, resourceTypeOptions);
+        fileInfos.AddRange(currentFileInfos);
+        foreach (var currentFileInfo in currentFileInfos.Where((currentFileInfo) => !currentFileInfo.HasBody))
+        {
+            fileInfos.AddRange(await ReceiveAllFiles(resourceTypeDefinition, resourceId, resourceTypeOptions, currentFileInfo.Key));
+        }
+        return fileInfos;
+    }
+
+    private void CreateMetadataSetsIfDontExist(string resourceId, ResourceEntry entry, IEnumerable<ResourceEntry> fileInfos)
+    {
+        var resourceGraphName = $"{_resourceUrlPrefix}/{resourceId}";
+        var newFileGraphName = $"{resourceGraphName}/{entry.Key}";
+        if (!newFileGraphName.EndsWith("/"))
+        {
+            newFileGraphName += "/";
+        }
+
+        var existingGraphs = ListGraphs(newFileGraphName);
+        if (!existingGraphs.Any())
+        {
+            Console.WriteLine($"Creating graphs for {newFileGraphName} since they did not exist before!");
+            _metadataGraphsCreator.CreateGraphs(resourceId, entry, fileInfos);
+        }
+    }
+
+    private IEnumerable<Uri> ListGraphs(string id)
+    {
+        var cmdString = new SparqlParameterizedString
+        {
+            CommandText = @"SELECT DISTINCT ?g
+                WHERE { GRAPH ?g { ?s ?p ?o }
+                FILTER(contains(str(?g), @graph)) }"
+        };
+        cmdString.SetLiteral("graph", id);
+
+        var resultSet = _rdfStoreConnector.QueryEndpoint.QueryWithResultSet(cmdString.ToString());
+
+        var graphs = new List<Uri>();
+        foreach (SparqlResult r in resultSet)
+        {
+            var uriNode = r.Value("g") as UriNode;
+            if (uriNode is not null)
+            {
+                graphs.Add(uriNode.Uri);
+            }
+        }
+        return graphs;
+    }
+
+    private bool HasCurrentMetadataExtracted(string resourceId, ResourceEntry entry)
+    {
+        var resourceGraphName = $"{_resourceUrlPrefix}/{resourceId}";
+        var newFileGraphName = $"{resourceGraphName}/{entry.Key}";
+        if (!newFileGraphName.EndsWith("/"))
+        {
+            newFileGraphName += "/";
+        }
+
+        var existingGraphs = ListGraphs(newFileGraphName);
+        var recentDataVersion = VersionUtil.GetRecentDataVersion(existingGraphs);
+        var recentDataExtractedVersion = VersionUtil.GetRecentDataExtractedVersion(existingGraphs);
+
+        return
+            recentDataExtractedVersion != null
+            && recentDataVersion != null
+            && recentDataExtractedVersion.AbsoluteUri.Contains(recentDataVersion.AbsoluteUri)
+            && recentDataExtractedVersion.AbsoluteUri != recentDataVersion.AbsoluteUri;
+    }
+
+    private async Task<MetadataOutput> ExtractMetadata(string resourceId, ResourceEntry entry, BaseResourceType resourceTypeDefinition, Dictionary<string, string>? resourceTypeOptions)
+    {
+        var loadedEntry = await resourceTypeDefinition.LoadEntry(resourceId, entry.Key, resourceTypeOptions);
+
+        if (loadedEntry is null)
+        {
+            throw new NullReferenceException("The resulting stream of the loaded entry is null.");
+        }
+
+        var extractedOutputs = await _apiClient.PostMetadataExtractorWorkerAsync(
+            loadedEntry,
+            $"{resourceId}/{entry.Key}",
+            null,
+            entry.Created?.ToString("o", CultureInfo.InvariantCulture),
+            entry.Modified?.ToString("o", CultureInfo.InvariantCulture)
+        );
+
+        return extractedOutputs[0];
+    }
+
+    private async Task StoreExtractedMetadata(string resourceId, ResourceEntry entry, MetadataOutput extractedMetadata, BaseResourceType resourceTypeDefinition, Dictionary<string, string>? resourceTypeOptions)
+    {
+        var metadataExtractorVersion = (await _apiClient.GetVersionWorkerAsync())._Version;
+
+        var resourceGraphName = $"{_resourceUrlPrefix}/{resourceId}";
+        var newFileGraphName = $"{resourceGraphName}/{entry.Key}";
+        var newFileGraphNameAddon = newFileGraphName;
+        if (!newFileGraphNameAddon.EndsWith("/"))
+        {
+            newFileGraphNameAddon += "/";
+        }
+
+        var existingGraphs = ListGraphs(newFileGraphNameAddon);
+        var recentDataVersion = VersionUtil.GetRecentDataVersion(existingGraphs);
+        var recentMetadataVersion = VersionUtil.GetRecentMetadataVersion(existingGraphs);
+
+        await CreateHashData(resourceId, entry, resourceTypeDefinition, resourceTypeOptions, newFileGraphNameAddon, recentDataVersion);
+
+        if (recentDataVersion is null)
+        {
+            throw new NullReferenceException("The recent data version is null and can't be used.");
+        }
+
+        var recentDataExtractedVersion = new Uri(recentDataVersion.AbsoluteUri + "&extracted=true");
+
+        if (recentMetadataVersion is null)
+        {
+            throw new NullReferenceException("The recent metadata version is null and can't be used.");
+        }
+
+        var recentMetadataExtractedVersion = new Uri(recentMetadataVersion.AbsoluteUri + "&extracted=true");
+
+        var tripleStore = new TripleStore();
+        tripleStore.LoadFromString(extractedMetadata.Metadata, new TriGParser(TriGSyntax.Recommendation));
+
+        FormatResultMetadata(tripleStore, recentDataExtractedVersion, recentMetadataExtractedVersion);
+
+        GraphStorer.StoreGraphs(tripleStore.Graphs, _rdfStoreConnector);
+
+        var trellisGraph = _rdfStoreConnector.GetGraph(trellisGraphUri);
+        var triples = new List<Triple>();
+
+        AddToTrellis(trellisGraph, rdfSourceUri, newFileGraphName, recentDataExtractedVersion.AbsoluteUri, triples);
+        AddToTrellis(trellisGraph, rdfSourceUri, newFileGraphName, recentMetadataExtractedVersion.AbsoluteUri, triples);
+        GraphStorer.AddToGraph(trellisGraph, triples, _rdfStoreConnector);
+
+        var newDataFileGraphName = $"{newFileGraphName}/@type=data";
+        var newMetadataFileGraphName = $"{newFileGraphName}/@type=metadata";
+
+        var dataGraph = CreateOrGetGraph(newDataFileGraphName);
+        var metadataGraph = CreateOrGetGraph(newMetadataFileGraphName);
+
+        dataGraph.Assert(new Triple(
+            dataGraph.CreateUriNode(new Uri(newDataFileGraphName)),
+            dataGraph.CreateUriNode(new Uri(dcatdistributionUrl)),
+            dataGraph.CreateUriNode(recentDataExtractedVersion)
+        ));
+        dataGraph.Assert(new Triple(
+            dataGraph.CreateUriNode(recentDataExtractedVersion),
+            dataGraph.CreateUriNode(new Uri(metadataExtractionVersionUrl)),
+            dataGraph.CreateLiteralNode(metadataExtractorVersion)
+        ));
+
+        metadataGraph.Assert(new Triple(
+            metadataGraph.CreateUriNode(new Uri(newMetadataFileGraphName)),
+            metadataGraph.CreateUriNode(new Uri(dcatdistributionUrl)),
+            metadataGraph.CreateUriNode(recentMetadataExtractedVersion)
+        ));
+        metadataGraph.Assert(new Triple(
+            metadataGraph.CreateUriNode(recentMetadataExtractedVersion),
+            metadataGraph.CreateUriNode(new Uri(metadataExtractionVersionUrl)),
+            metadataGraph.CreateLiteralNode(metadataExtractorVersion)
+        ));
+        metadataGraph.Assert(new Triple(
+            metadataGraph.CreateUriNode(recentMetadataVersion),
+            metadataGraph.CreateUriNode(new Uri("http://purl.org/fdp/fdp-o#isMetadataOf")),
+            metadataGraph.CreateUriNode(recentDataVersion)
+        ));
+
+        var provenanceGraphs = new List<IGraph> { dataGraph, metadataGraph };
+        GraphStorer.StoreGraphs(provenanceGraphs, _rdfStoreConnector);
+    }
+
+    private async Task CreateHashData(string resourceId, ResourceEntry entry, BaseResourceType resourceTypeDefinition, Dictionary<string, string>? resourceTypeOptions, string newFileGraphNameAddon, Uri? recentDataVersion)
+    {
+        var dataGraphName = $"{newFileGraphNameAddon}@type=data";
+        var dataGraph = CreateOrGetGraph(dataGraphName);
+
+        var hashTriples = new List<Triple>();
+
+        var loadedEntry = await resourceTypeDefinition.LoadEntry(resourceId, entry.Key, resourceTypeOptions);
+
+        if (loadedEntry is null)
+        {
+            throw new NullReferenceException("The resulting stream of the loaded entry is null, when trying to hash the data.");
+        }
+
+        var sha512Hash = Convert.ToBase64String(HashUtil.HashData(loadedEntry, HashAlgorithmName.SHA512));
+
+        var dataGraphId = recentDataVersion;
+        var hashGraphId = new Uri($"{dataGraphId?.AbsoluteUri}&hash={Guid.NewGuid()}");
+
+        var dataGraphSubject = dataGraph.CreateUriNode(dataGraphId);
+        var hashSubject = dataGraph.CreateUriNode(hashGraphId);
+
+        hashTriples.Add(new Triple(dataGraphSubject,
+                        dataGraph.CreateUriNode(new Uri("http://www.ebu.ch/metadata/ontologies/ebucore/ebucore#hashType")),
+                        hashSubject));
+        hashTriples.Add(new Triple(hashSubject,
+                                    dataGraph.CreateUriNode(new Uri("http://www.ebu.ch/metadata/ontologies/ebucore/ebucore#hashFunction")),
+                                    dataGraph.CreateLiteralNode("SHA512")));
+        hashTriples.Add(new Triple(hashSubject,
+                                    dataGraph.CreateUriNode(new Uri("http://www.ebu.ch/metadata/ontologies/ebucore/ebucore#hashValue")),
+                                    dataGraph.CreateLiteralNode(sha512Hash, new Uri("http://www.w3.org/2001/XMLSchema#hexBinary"))));
+
+        GraphStorer.AddToGraph(dataGraph, hashTriples, _rdfStoreConnector);
+    }
+
+    private static void FormatResultMetadata(TripleStore tripleStore, Uri dataExtractGraph, Uri metadataExtractGraph)
+    {
+        foreach (var graph in tripleStore.Graphs.ToArray())
+        {
+            if (graph.BaseUri != dataExtractGraph && graph.BaseUri != metadataExtractGraph)
+            {
+                tripleStore.Remove(graph.BaseUri);
+                if (graph.BaseUri.AbsoluteUri.Contains("type=data"))
+                {
+                    graph.BaseUri = dataExtractGraph;
+                }
+                else
+                {
+                    graph.BaseUri = metadataExtractGraph;
+                }
+                tripleStore.Add(graph, true);
+            }
+        }
+    }
+
+    private static void AddToTrellis(IGraph trellisGraph, string ldpAssignment, string thePartUri, string graphUri, ICollection<Triple> triples)
+    {
+        var setGraphNode = trellisGraph.CreateUriNode(new Uri(graphUri));
+        var setThePartNode = trellisGraph.CreateUriNode(new Uri(thePartUri));
+        var triple = new Triple(
+            setGraphNode,
+            trellisGraph.CreateUriNode(new Uri(partOfUri)),
+            setThePartNode
+        );
+        if (!trellisGraph.ContainsTriple(triple))
+        {
+            triples.Add(triple);
+            trellisGraph.Assert(triple);
+            var assignmentTriple = new Triple(
+                setGraphNode,
+                trellisGraph.CreateUriNode(new Uri(aUri)),
+                trellisGraph.CreateUriNode(new Uri(ldpAssignment))
+            );
+            triples.Add(assignmentTriple);
+            trellisGraph.Assert(assignmentTriple);
+            AddModifiedDate(trellisGraph, graphUri, triples);
+        }
+    }
+
+    private IGraph CreateOrGetGraph(string graphUrl)
+    {
+        var entryAlreadyExists = _rdfStoreConnector.HasGraph(graphUrl);
+        return entryAlreadyExists
+            ? _rdfStoreConnector.GetGraph(graphUrl)
+            : new Graph()
+            {
+                BaseUri = new Uri(graphUrl)
+            };
+    }
+
+    private static void AddModifiedDate(IGraph graph, string root, ICollection<Triple> triples)
+    {
+        var dcTermsModifiedNode = graph.CreateUriNode(new Uri(dctermsModifiedUri));
+        var rootNode = graph.CreateUriNode(new Uri(root));
+        if (!graph.GetTriplesWithSubjectPredicate(rootNode, dcTermsModifiedNode).Any())
+        {
+            var triple = new Triple(
+                rootNode,
+                dcTermsModifiedNode,
+                graph.CreateLiteralNode(
+                    DateTime.UtcNow.ToString("o", CultureInfo.InvariantCulture),
+                    new Uri(XmlSpecsHelper.XmlSchemaDataTypeDateTime)
+                )
+            );
+            triples.Add(triple);
+            graph.Assert(triple);
+        }
+    }
+}
\ No newline at end of file

src/MetadataExtractorCron/Extractors/IMetadataExtractor.cs

+namespace MetadataExtractorCron.Extractors;
+
+public interface IMetadataExtractor
+{
+    Task PerformExtraction();
+}
\ No newline at end of file

src/MetadataExtractorCron/MetadataExtractorCron.csproj

@@ -5,11 +5,17 @@
     <TargetFramework>net6.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
-  <Version>0.1.0</Version></PropertyGroup>
+  <Version>0.1.1</Version></PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Coscine.Database" Version="2.*-*" />
+    <PackageReference Include="Coscine.Database" Version="2.15.0-issue-1788-extra0002" />
     <PackageReference Include="Coscine.Metadata" Version="2.*-*" />
+    <PackageReference Include="Coscine.ResourceTypes" Version="1.5.1" />
+    <PackageReference Include="dotNetRDF" Version="2.7.5" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\OpenApiGeneratedConnector\OpenApiGeneratedConnector.csproj" />
   </ItemGroup>
 
 </Project>

src/MetadataExtractorCron/Program.cs

-Console.WriteLine("\n Finished.");
+using MetadataExtractorCron.Extractors;
+
+var metadataExtractor = new CoscineMetadataExtractor();
+
+await metadataExtractor.PerformExtraction();
+
+Console.WriteLine("Finished.");
\ No newline at end of file

src/MetadataExtractorCron/Util/GraphStorer.cs

+using Coscine.Metadata;
+using VDS.RDF;
+
+namespace MetadataExtractorCron.Util;
+
+public static class GraphStorer
+{
+    public static void StoreGraphs(IEnumerable<IGraph> graphUris, RdfStoreConnector rdfStoreConnector)
+    {
+        foreach (var graphUri in graphUris)
+        {
+            Console.WriteLine($" ({graphUri.BaseUri})");
+
+            if (rdfStoreConnector.HasGraph(graphUri.BaseUri))
+            {
+                Console.WriteLine($" - Graph {graphUri.BaseUri} exists");
+
+                // Clear the existing graph from the store
+                rdfStoreConnector.ClearGraph(graphUri.BaseUri);
+                Console.WriteLine($" - Cleared Graph {graphUri.BaseUri}");
+            }
+
+            // Chunking since the size otherwise can be too large
+            foreach (var triples in graphUri.Triples.Chunk(100))
+            {
+                rdfStoreConnector.ReadWriteSparqlConnector.UpdateGraph(graphUri.BaseUri, triples, Enumerable.Empty<Triple>());
+            }
+
+            Console.WriteLine($" - Graph {graphUri.BaseUri} added successfully");
+            Console.WriteLine();
+        }
+    }
+
+    public static void AddToGraph(IGraph graph, IEnumerable<Triple> triples, RdfStoreConnector rdfStoreConnector)
+    {
+        Console.WriteLine($" - Adding Triples to {graph.BaseUri}");
+        rdfStoreConnector.ReadWriteSparqlConnector.UpdateGraph(graph.BaseUri, triples, Enumerable.Empty<Triple>());
+        Console.WriteLine($" - Triples added to Graph {graph.BaseUri} successfully");
+        Console.WriteLine();
+    }
+}
\ No newline at end of file

src/MetadataExtractorCron/Util/HashUtil.cs

+using System.Security.Cryptography;
+
+namespace MetadataExtractorCron.Util;
+
+public static class HashUtil
+{
+    private static HashAlgorithm GetHashAlgorithm(HashAlgorithmName hashAlgorithmName)
+    {
+        if (hashAlgorithmName == HashAlgorithmName.MD5)
+            return MD5.Create();
+        if (hashAlgorithmName == HashAlgorithmName.SHA1)
+            return SHA1.Create();
+        if (hashAlgorithmName == HashAlgorithmName.SHA256)
+            return SHA256.Create();
+        if (hashAlgorithmName == HashAlgorithmName.SHA384)
+            return SHA384.Create();
+        if (hashAlgorithmName == HashAlgorithmName.SHA512)
+            return SHA512.Create();
+
+        throw new CryptographicException($"Unknown hash algorithm \"{hashAlgorithmName.Name}\".");
+    }
+
+    public static byte[] HashData(Stream data,
+        HashAlgorithmName hashAlgorithm)
+    {
+        using var hashAlgorithmObject = GetHashAlgorithm(hashAlgorithm);
+        return hashAlgorithmObject.ComputeHash(data);
+    }
+}
\ No newline at end of file

src/MetadataExtractorCron/Util/MetadataGraphsCreator.cs

+using Coscine.Metadata;
+using Coscine.ResourceTypes.Base.Models;
+using System.Globalization;
+using VDS.RDF;
+using VDS.RDF.Parsing;
+using VDS.RDF.Query;
+
+namespace MetadataExtractorCron.Util;
+
+/// <summary>
+/// Derived from MetadataMigrator
+/// </summary>
+public class MetadataGraphsCreator
+{
+    private const string partOfUri = "http://purl.org/dc/terms/isPartOf";
+    private const string aUri = "http://www.w3.org/1999/02/22-rdf-syntax-ns#type";
+    private const string basicContainerUri = "http://www.w3.org/ns/ldp#BasicContainer";
+    private const string nonRdfSourceUri = "http://www.w3.org/ns/ldp#NonRDFSource";
+    private const string rdfSourceUri = "http://www.w3.org/ns/ldp#RDFSource";
+
+    private const string dcatcatalogUri = "http://www.w3.org/ns/dcat#catalog";
+    private const string dcatCatalogClassUri = "http://www.w3.org/ns/dcat#Catalog";
+
+    private const string dctermsIdentifierUri = "http://purl.org/dc/terms/identifier";
+    private const string dctermsModifiedUri = "http://purl.org/dc/terms/modified";
+
+    private const string fdpMetadataServiceUri = "http://purl.org/fdp/fdp-o#MetadataService";
+    private const string fdphasMetadataUri = "http://purl.org/fdp/fdp-o#hasMetadata";
+
+    private const string provEntityUri = "http://www.w3.org/ns/prov#Entity";
+    private const string provGeneratedAtTimeUri = "http://www.w3.org/ns/prov#generatedAtTime";
+    private const string provWasRevisionOfUri = "http://www.w3.org/ns/prov#wasRevisionOfNode";
+
+    private const string ldpDescribedByUri = "http://www.w3.org/ns/ldp#describedBy";
+
+    private const string resourceUrlPrefix = "https://purl.org/coscine/resources";
+
+    private const string trellisGraphUri = "http://www.trellisldp.org/ns/trellis#PreferServerManaged";
+
+    private RdfStoreConnector RdfStoreConnector { get; }
+
+    public MetadataGraphsCreator(RdfStoreConnector rdfStoreConnector)
+    {
+        RdfStoreConnector = rdfStoreConnector;
+    }
+
+    public void CreateGraphs(string resourceId, ResourceEntry entry, IEnumerable<ResourceEntry> fileInfos)
+    {
+        var trellisGraph = RdfStoreConnector.GetGraph(trellisGraphUri);
+
+        var graphs = new List<IGraph>();
+        var triples = new List<Triple>();
+
+        var resourceGraphName = $"{resourceUrlPrefix}/{resourceId}";
+
+        var fileGraphs = fileInfos.Select((entry) =>
+        {
+            var entryGraphName = $"{resourceGraphName}/{entry.Key}";
+            if (!entryGraphName.EndsWith("/"))
+            {
+                entryGraphName += "/";
+            }
+            return new Uri(entryGraphName);
+        });
+
+        var newFileGraphName = $"{resourceGraphName}/{entry.Key}";
+        Console.WriteLine($"Migrating {newFileGraphName}");
+
+        var version = VersionUtil.GetNewVersion();
+
+        var newMetadataFileGraphName = $"{newFileGraphName}/@type=metadata";
+        var newDataFileGraphName = $"{newFileGraphName}/@type=data";
+        var newMetadataVersionFileGraphName = $"{newFileGraphName}/@type=metadata&version={version}";
+        var newDataVersionFileGraphName = $"{newFileGraphName}/@type=data&version={version}";
+
+        var newFileGraph = CreateOrGetGraph(newFileGraphName);
+        var fileNode = newFileGraph.CreateUriNode(new Uri(newFileGraphName));
+        graphs.Add(newFileGraph);
+
+        // Set relation to resource, if a plain file in no folder
+        if (!entry.Key.Any((character) => character == '/'))
+        {
+            AddToTrellis(trellisGraph, basicContainerUri, resourceGraphName, newFileGraphName, triples);
+        }
+
+        newFileGraph.Assert(new Triple(fileNode, newFileGraph.CreateUriNode(new Uri(aUri)), newFileGraph.CreateUriNode(new Uri(dcatCatalogClassUri))));
+        newFileGraph.Assert(new Triple(fileNode, newFileGraph.CreateUriNode(new Uri(aUri)), newFileGraph.CreateUriNode(new Uri(fdpMetadataServiceUri))));
+        AddFilesToAFolder(trellisGraph, fileGraphs, new Uri(newFileGraphName), newFileGraph, newFileGraphName, triples);
+
+        var metadataFileGraph = SetMetadataGraph(trellisGraph, graphs, newMetadataFileGraphName, newFileGraph, newFileGraphName, triples);
+        var dataFileGraph = SetDataGraph(trellisGraph, graphs, newDataFileGraphName, newFileGraph, newFileGraphName, metadataFileGraph.BaseUri.AbsoluteUri, triples);
+
+        var existingGraphs = ListGraphs(newFileGraphName + "/");
+
+        SetDataVersionGraph(graphs, newDataVersionFileGraphName, dataFileGraph, existingGraphs, trellisGraph, newFileGraphName, triples);
+        SetMetadataVersionGraph(graphs, newMetadataVersionFileGraphName, metadataFileGraph, existingGraphs, trellisGraph, newFileGraphName, triples);
+
+        GraphStorer.StoreGraphs(graphs, RdfStoreConnector);
+        GraphStorer.AddToGraph(trellisGraph, triples, RdfStoreConnector);
+    }
+
+    private static void AddFilesToAFolder(IGraph trellisGraph, IEnumerable<Uri> fileGraphs, Uri fileGraph, IGraph newFileGraph, string fileUri, ICollection<Triple> triples)
+    {
+        // Add all files to a folder
+        foreach (var otherFileGraph in fileGraphs)
+        {
+            // TODO: Deal with multiple levels of files
+            if (otherFileGraph.AbsoluteUri != fileGraph.AbsoluteUri
+                && otherFileGraph.AbsoluteUri.Contains(fileGraph.AbsoluteUri + "/")
+                && !otherFileGraph.AbsoluteUri.Contains("&data")
+                && !otherFileGraph.AbsoluteUri.Contains("?type=")
+                && !otherFileGraph.AbsoluteUri.Contains("&type=")
+                && !otherFileGraph.AbsoluteUri.Contains("@type="))
+            {
+                var otherFileNode = newFileGraph.CreateUriNode(otherFileGraph);
+                newFileGraph.Assert(new Triple(newFileGraph.CreateUriNode(new Uri(fileUri)), newFileGraph.CreateUriNode(new Uri(dcatcatalogUri)), otherFileNode));
+                AddToTrellis(trellisGraph, basicContainerUri, fileUri, otherFileGraph.AbsoluteUri, triples);
+            }
+        }
+    }
+
+    private IGraph SetMetadataGraph(IGraph trellisGraph, List<IGraph> graphs, string newMetadataFileGraphName, IGraph newFileGraph, string fileUri, ICollection<Triple> triples)
+    {
+        var metadataFileNode = newFileGraph.CreateUriNode(new Uri(newMetadataFileGraphName));
+        var metadataFileGraph = CreateOrGetGraph(newMetadataFileGraphName);
+        graphs.Add(metadataFileGraph);
+        AddToTrellis(trellisGraph, rdfSourceUri, fileUri, newMetadataFileGraphName, triples);
+        var fileNode = newFileGraph.CreateUriNode(new Uri(fileUri));
+        newFileGraph.Assert(new Triple(fileNode, newFileGraph.CreateUriNode(new Uri(dcatcatalogUri)), metadataFileNode));
+        newFileGraph.Assert(new Triple(fileNode, newFileGraph.CreateUriNode(new Uri(fdphasMetadataUri)), metadataFileNode));
+        metadataFileGraph.Assert(new Triple(
+            Tools.CopyNode(metadataFileNode, metadataFileGraph),
+            metadataFileGraph.CreateUriNode(new Uri(aUri)),
+            metadataFileGraph.CreateUriNode(new Uri(dcatCatalogClassUri))
+        ));
+        return metadataFileGraph;
+    }
+
+    private IGraph SetDataGraph(IGraph trellisGraph, List<IGraph> graphs, string newDataFileGraphName, IGraph newFileGraph, string fileUri, string metadataFileUri, ICollection<Triple> triples)
+    {
+        var dataFileNode = newFileGraph.CreateUriNode(new Uri(newDataFileGraphName));
+        var dataFileGraph = CreateOrGetGraph(newDataFileGraphName);
+        graphs.Add(dataFileGraph);
+        AddToTrellis(trellisGraph, nonRdfSourceUri, fileUri, newDataFileGraphName, triples);
+        var fileNode = newFileGraph.CreateUriNode(new Uri(fileUri));
+        newFileGraph.Assert(new Triple(fileNode, newFileGraph.CreateUriNode(new Uri(dcatcatalogUri)), dataFileNode));
+        dataFileGraph.Assert(new Triple(Tools.CopyNode(dataFileNode, dataFileGraph), dataFileGraph.CreateUriNode(new Uri(aUri)), dataFileGraph.CreateUriNode(new Uri(dcatCatalogClassUri))));
+        dataFileGraph.Assert(new Triple(Tools.CopyNode(dataFileNode, dataFileGraph), dataFileGraph.CreateUriNode(new Uri(ldpDescribedByUri)), dataFileGraph.CreateUriNode(new Uri(metadataFileUri))));
+        return dataFileGraph;
+    }
+
+    private void SetDataVersionGraph(List<IGraph> graphs, string newDataVersionFileGraphName, IGraph dataFileGraph, IEnumerable<Uri> existingGraphs, IGraph trellisGraph, string fileUri, ICollection<Triple> triples)
+    {
+        var recentDataVersion = VersionUtil.GetRecentDataVersion(existingGraphs);
+
+        IGraph currentDataVersionGraph;
+        if (recentDataVersion == null)
+        {
+            currentDataVersionGraph = new Graph()
+            {
+                BaseUri = new Uri(newDataVersionFileGraphName),
+            };
+        }
+        else
+        {
+            currentDataVersionGraph = RdfStoreConnector.GetGraph(recentDataVersion);
+        }
+        var currentDataVersionNode = currentDataVersionGraph.CreateUriNode(currentDataVersionGraph.BaseUri);
+        currentDataVersionGraph.Assert(new Triple(currentDataVersionNode, currentDataVersionGraph.CreateUriNode(new Uri(dctermsIdentifierUri)), currentDataVersionGraph.CreateLiteralNode(
+            currentDataVersionGraph.BaseUri.AbsoluteUri,
+            new Uri(XmlSpecsHelper.XmlSchemaDataTypeString)
+        )));
+
+        // PROV Info
+        var provTriple = new Triple(Tools.CopyNode(currentDataVersionNode, dataFileGraph), dataFileGraph.CreateUriNode(new Uri(aUri)), dataFileGraph.CreateUriNode(new Uri(provEntityUri)));
+        if (!dataFileGraph.ContainsTriple(provTriple))
+        {
+            dataFileGraph.Assert(provTriple);
+            dataFileGraph.Assert(new Triple(
+                dataFileGraph.CreateUriNode(dataFileGraph.BaseUri),
+                dataFileGraph.CreateUriNode(new Uri("http://www.w3.org/ns/dcat#dataset")),
+                Tools.CopyNode(currentDataVersionNode, dataFileGraph)
+            ));
+            dataFileGraph.Assert(new Triple(Tools.CopyNode(currentDataVersionNode, dataFileGraph), dataFileGraph.CreateUriNode(new Uri(provGeneratedAtTimeUri)), dataFileGraph.CreateLiteralNode(
+                DateTime.UtcNow.ToString("o", CultureInfo.InvariantCulture),
+                new Uri(XmlSpecsHelper.XmlSchemaDataTypeDateTime)
+            )));
+            AddToTrellis(trellisGraph, nonRdfSourceUri, fileUri, currentDataVersionGraph.BaseUri.AbsoluteUri, triples);
+        }
+        if (recentDataVersion != null && recentDataVersion.AbsoluteUri != currentDataVersionGraph.BaseUri.AbsoluteUri)
+        {
+            var recentDataVersionNode = dataFileGraph.CreateUriNode(recentDataVersion);
+            dataFileGraph.Assert(new Triple(Tools.CopyNode(currentDataVersionNode, dataFileGraph), dataFileGraph.CreateUriNode(new Uri(provWasRevisionOfUri)), recentDataVersionNode));
+        }
+
+        graphs.Add(currentDataVersionGraph);
+    }
+
+    private void SetMetadataVersionGraph(List<IGraph> graphs, string newMetadataVersionFileGraphName, IGraph metadataFileGraph, IEnumerable<Uri> existingGraphs, IGraph trellisGraph, string fileUri, ICollection<Triple> triples)
+    {
+        var recentMetadataVersion = VersionUtil.GetRecentMetadataVersion(existingGraphs);
+
+        IGraph currentMetadataVersionGraph;
+        if (recentMetadataVersion == null)
+        {
+            currentMetadataVersionGraph = new Graph()
+            {
+                BaseUri = new Uri(newMetadataVersionFileGraphName),
+            };
+        }
+        else
+        {
+            currentMetadataVersionGraph = RdfStoreConnector.GetGraph(recentMetadataVersion);
+        }
+        var currentMetadataVersionNode = currentMetadataVersionGraph.CreateUriNode(currentMetadataVersionGraph.BaseUri);
+
+        // PROV Info
+        var provTriple = new Triple(Tools.CopyNode(currentMetadataVersionNode, metadataFileGraph), metadataFileGraph.CreateUriNode(new Uri(aUri)), metadataFileGraph.CreateUriNode(new Uri(provEntityUri)));
+        if (!metadataFileGraph.ContainsTriple(provTriple))
+        {
+            metadataFileGraph.Assert(provTriple);
+            metadataFileGraph.Assert(new Triple(
+                metadataFileGraph.CreateUriNode(metadataFileGraph.BaseUri),
+                metadataFileGraph.CreateUriNode(new Uri("http://purl.org/fdp/fdp-o#hasMetadata")),
+                Tools.CopyNode(currentMetadataVersionNode, metadataFileGraph)
+            ));
+            metadataFileGraph.Assert(new Triple(Tools.CopyNode(currentMetadataVersionNode, metadataFileGraph), metadataFileGraph.CreateUriNode(new Uri(provGeneratedAtTimeUri)), metadataFileGraph.CreateLiteralNode(
+                DateTime.UtcNow.ToString("o", CultureInfo.InvariantCulture),
+                new Uri(XmlSpecsHelper.XmlSchemaDataTypeDateTime)
+            )));
+            AddToTrellis(trellisGraph, rdfSourceUri, fileUri, currentMetadataVersionGraph.BaseUri.AbsoluteUri, triples);
+        }
+        if (recentMetadataVersion != null && recentMetadataVersion.AbsoluteUri != currentMetadataVersionGraph.BaseUri.AbsoluteUri)
+        {
+            var recentMetadataVersionNode = metadataFileGraph.CreateUriNode(recentMetadataVersion);
+            metadataFileGraph.Assert(new Triple(Tools.CopyNode(currentMetadataVersionNode, metadataFileGraph), metadataFileGraph.CreateUriNode(new Uri(provWasRevisionOfUri)), recentMetadataVersionNode));
+        }
+
+        graphs.Add(currentMetadataVersionGraph);
+    }
+
+    private static void AddToTrellis(IGraph trellisGraph, string ldpAssignment, string thePartUri, string graphUri, ICollection<Triple> triples)
+    {
+        var setGraphNode = trellisGraph.CreateUriNode(new Uri(graphUri));
+        var setThePartNode = trellisGraph.CreateUriNode(new Uri(thePartUri));
+        var triple = new Triple(
+            setGraphNode,
+            trellisGraph.CreateUriNode(new Uri(partOfUri)),
+            setThePartNode
+        );
+        if (!trellisGraph.ContainsTriple(triple))
+        {
+            triples.Add(triple);
+            trellisGraph.Assert(triple);
+            var assignmentTriple = new Triple(
+                setGraphNode,
+                trellisGraph.CreateUriNode(new Uri(aUri)),
+                trellisGraph.CreateUriNode(new Uri(ldpAssignment))
+            );
+            triples.Add(assignmentTriple);
+            trellisGraph.Assert(assignmentTriple);
+            AddModifiedDate(trellisGraph, graphUri, triples);
+        }
+    }
+
+    private IGraph CreateOrGetGraph(string graphUrl)
+    {
+        var entryAlreadyExists = RdfStoreConnector.HasGraph(graphUrl);
+        return entryAlreadyExists
+            ? RdfStoreConnector.GetGraph(graphUrl)
+            : new Graph()
+            {
+                BaseUri = new Uri(graphUrl)
+            };
+    }
+
+    public IEnumerable<Uri> ListGraphs(string id)
+    {
+        var cmdString = new SparqlParameterizedString
+        {
+            CommandText = @"SELECT DISTINCT ?g
+                WHERE { GRAPH ?g { ?s ?p ?o }
+                FILTER(contains(str(?g), @graph)) }"
+        };
+        cmdString.SetLiteral("graph", id);
+
+        var resultSet = RdfStoreConnector.QueryEndpoint.QueryWithResultSet(cmdString.ToString());
+
+        var graphs = new List<Uri>();
+        foreach (SparqlResult r in resultSet)
+        {
+            var uriNode = r.Value("g") as UriNode;
+            if (uriNode is not null)
+            {
+                graphs.Add(uriNode.Uri);
+            }
+        }
+        return graphs;
+    }
+
+    private static void AddModifiedDate(IGraph graph, string root, ICollection<Triple> triples)
+    {
+        var dcTermsModifiedNode = graph.CreateUriNode(new Uri(dctermsModifiedUri));
+        var rootNode = graph.CreateUriNode(new Uri(root));
+        if (!graph.GetTriplesWithSubjectPredicate(rootNode, dcTermsModifiedNode).Any())
+        {
+            var triple = new Triple(
+                rootNode,
+                dcTermsModifiedNode,
+                graph.CreateLiteralNode(
+                    DateTime.UtcNow.ToString("o", CultureInfo.InvariantCulture),
+                    new Uri(XmlSpecsHelper.XmlSchemaDataTypeDateTime)
+                )
+            );
+            triples.Add(triple);
+            graph.Assert(triple);
+        }
+    }
+}
\ No newline at end of file

src/MetadataExtractorCron/VersionUtil.cs

-using System;
-using System.Collections.Generic;
-using System.Linq;
+using System.Web;
 
-namespace MetadataMigrator
-{
-    public class VersionUtil
+namespace MetadataExtractorCron;
+
+public static class VersionUtil
 {
-        public static Uri? GetRecentVersion(IEnumerable<Uri> graphs, string filter = null)
+    public static Uri? GetRecentVersion(IEnumerable<Uri> graphUris, string? filter = null, bool notFilterExtracted = true)
     {
-            var currentBest = graphs.FirstOrDefault();
+        var currentBest = graphUris.FirstOrDefault();
         var currentBestVersion = 0L;
-            foreach (var graph in graphs)
+        foreach (var graphUri in graphUris)
         {
-                var queryDictionary = System.Web.HttpUtility.ParseQueryString(
-                    new Uri(graph.ToString().Replace("@", "?")).Query);
+            var queryDictionary = HttpUtility.ParseQueryString(new Uri(graphUri.ToString().Replace("@", "?")).Query);
             var version = queryDictionary["version"];
             if (version == null || !long.TryParse(version, out long longVersion))
             {
                 continue;
             }
-                if (longVersion > currentBestVersion && queryDictionary["extracted"] == null && (filter == null || queryDictionary[filter] != null))
+            if (longVersion > currentBestVersion
+                && (filter == null || queryDictionary["type"] == filter)
+                &&
+                    ((notFilterExtracted && queryDictionary["extracted"] == null)
+                    || (!notFilterExtracted && queryDictionary["extracted"] != null))
+            )
             {
                 currentBestVersion = longVersion;
-                    currentBest = graph;
+                currentBest = graphUri;
             }
         }
         return currentBest;
     }
 
-        public static Uri GetRecentDataVersion(IEnumerable<Uri> graphs)
+    public static Uri? GetRecentDataExtractedVersion(IEnumerable<Uri> graphUris)
+    {
+        return GetRecentVersion(graphUris, "data", false);
+    }
+
+    public static Uri? GetRecentDataVersion(IEnumerable<Uri> graphUris)
     {
-            return GetRecentVersion(graphs, "data");
+        return GetRecentVersion(graphUris, "data");
     }
 
-        public static Uri GetRecentMetadataVersion(IEnumerable<Uri> graphs)
+    public static Uri? GetRecentMetadataVersion(IEnumerable<Uri> graphUris)
     {
-            return GetRecentVersion(graphs, "metadata");
+        return GetRecentVersion(graphUris, "metadata");
     }
 
     public static long GetNewVersion()
@@ -44,4 +51,3 @@ namespace MetadataMigrator
         return long.Parse(Convert.ToString((int)DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1)).TotalSeconds));
     }
 }
\ No newline at end of file
-}

src/OpenApiGeneratedConnector/.gitignore

+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Mono auto generated files
+mono_crash.*
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+[Ww][Ii][Nn]32/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+[Ll]ogs/
+
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUnit
+*.VisualState.xml
+TestResult.xml
+nunit-*.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# ASP.NET Scaffolding
+ScaffoldingReadMe.txt
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# Visual Studio Trace Files
+*.e2e
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Coverlet is a free, cross platform Code Coverage Tool
+coverage*.json
+coverage*.xml
+coverage*.info
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# Note: Comment the next line if you want to checkin your web deploy settings,
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# NuGet Symbol Packages
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+*.appxbundle
+*.appxupload
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!?*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+*- [Bb]ackup.rdl
+*- [Bb]ackup ([0-9]).rdl
+*- [Bb]ackup ([0-9][0-9]).rdl
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
+
+# Backup folder for Package Reference Convert tool in Visual Studio 2017
+MigrationBackup/
+
+# Ionide (cross platform F# VS Code tools) working folder
+.ionide/
+
+# Fody - auto-generated XML schema
+FodyWeavers.xsd

src/OpenApiGeneratedConnector/.openapi-generator-ignore

+# OpenAPI Generator Ignore
+# Generated by openapi-generator https://github.com/openapitools/openapi-generator
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell OpenAPI Generator to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md

src/OpenApiGeneratedConnector/OpenApiGeneratedConnector.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  <Version>0.1.1</Version></PropertyGroup>
+
+
+  <ItemGroup>
+	<PackageReference Include="JsonSubTypes" Version="1.9.0" />
+	<PackageReference Include="Polly" Version="7.2.3" />
+	<PackageReference Include="RestSharp" Version="108.0.2" />
+	<PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />
+  </ItemGroup>
+
+</Project>

src/OpenApiGeneratedConnector/README.md

+# Org.OpenAPITools - the C# library for the Metadata Extractor API
+
+This API extracts RDF triples from files
+
+This C# SDK is automatically generated by the [OpenAPI Generator](https://openapi-generator.tech) project:
+
+- API version: 0.1.1
+- SDK version: 1.0.0
+- Build package: org.openapitools.codegen.languages.CSharpNetCoreClientCodegen
+
+<a name="frameworks-supported"></a>
+## Frameworks supported
+- .NET Core >=1.0
+- .NET Framework >=4.6
+- Mono/Xamarin >=vNext
+
+<a name="dependencies"></a>
+## Dependencies
+
+- [RestSharp](https://www.nuget.org/packages/RestSharp) - 106.13.0 or later
+- [Json.NET](https://www.nuget.org/packages/Newtonsoft.Json/) - 13.0.1 or later
+- [JsonSubTypes](https://www.nuget.org/packages/JsonSubTypes/) - 1.8.0 or later
+- [System.ComponentModel.Annotations](https://www.nuget.org/packages/System.ComponentModel.Annotations) - 5.0.0 or later
+
+The DLLs included in the package may not be the latest version. We recommend using [NuGet](https://docs.nuget.org/consume/installing-nuget) to obtain the latest version of the packages:
+```
+Install-Package RestSharp
+Install-Package Newtonsoft.Json
+Install-Package JsonSubTypes
+Install-Package System.ComponentModel.Annotations
+```
+
+NOTE: RestSharp versions greater than 105.1.0 have a bug which causes file uploads to fail. See [RestSharp#742](https://github.com/restsharp/RestSharp/issues/742).
+NOTE: RestSharp for .Net Core creates a new socket for each api call, which can lead to a socket exhaustion problem. See [RestSharp#1406](https://github.com/restsharp/RestSharp/issues/1406).
+
+<a name="installation"></a>
+## Installation
+Generate the DLL using your preferred tool (e.g. `dotnet build`)
+
+Then include the DLL (under the `bin` folder) in the C# project, and use the namespaces:
+```csharp
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Client;
+using Org.OpenAPITools.Model;
+```
+<a name="usage"></a>
+## Usage
+
+To use the API client with a HTTP proxy, setup a `System.Net.WebProxy`
+```csharp
+Configuration c = new Configuration();
+System.Net.WebProxy webProxy = new System.Net.WebProxy("http://myProxyUrl:80/");
+webProxy.Credentials = System.Net.CredentialCache.DefaultCredentials;
+c.Proxy = webProxy;
+```
+
+<a name="getting-started"></a>
+## Getting Started
+
+```csharp
+using System.Collections.Generic;
+using System.Diagnostics;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Client;
+using Org.OpenAPITools.Model;
+
+namespace Example
+{
+    public class Example
+    {
+        public static void Main()
+        {
+
+            Configuration config = new Configuration();
+            config.BasePath = "http://localhost";
+            var apiInstance = new DefaultApi(config);
+
+            try
+            {
+                apiInstance.GetConfigWorker();
+            }
+            catch (ApiException e)
+            {
+                Debug.Print("Exception when calling DefaultApi.GetConfigWorker: " + e.Message );
+                Debug.Print("Status Code: "+ e.ErrorCode);
+                Debug.Print(e.StackTrace);
+            }
+
+        }
+    }
+}
+```
+
+<a name="documentation-for-api-endpoints"></a>
+## Documentation for API Endpoints
+
+All URIs are relative to *http://localhost*
+
+Class | Method | HTTP request | Description
+------------ | ------------- | ------------- | -------------
+*DefaultApi* | [**GetConfigWorker**](docs/DefaultApi.md#getconfigworker) | **GET** /defaultConfig | 
+*DefaultApi* | [**GetVersionWorker**](docs/DefaultApi.md#getversionworker) | **GET** /version | 
+*DefaultApi* | [**PostMetadataExtractorWorker**](docs/DefaultApi.md#postmetadataextractorworker) | **POST** / | 
+
+
+<a name="documentation-for-models"></a>
+## Documentation for Models
+
+ - [Model.MetadataOutput](docs/MetadataOutput.md)
+ - [Model.ModelVersion](docs/ModelVersion.md)
+
+
+<a name="documentation-for-authorization"></a>
+## Documentation for Authorization
+
+All endpoints do not require authorization.

src/OpenApiGeneratedConnector/appveyor.yml

+# auto-generated by OpenAPI Generator (https://github.com/OpenAPITools/openapi-generator)
+#
+image: Visual Studio 2019
+clone_depth: 1
+build_script:
+- dotnet build -c Release
+- dotnet test -c Release
+after_build:
+- dotnet pack .\src\Org.OpenAPITools\Org.OpenAPITools.csproj -o ../../output -c Release --no-build

src/OpenApiGeneratedConnector/docs/DefaultApi.md

+# Org.OpenAPITools.Api.DefaultApi
+
+All URIs are relative to *http://localhost*
+
+| Method | HTTP request | Description |
+|--------|--------------|-------------|
+| [**GetConfigWorker**](DefaultApi.md#getconfigworker) | **GET** /defaultConfig |  |
+| [**GetVersionWorker**](DefaultApi.md#getversionworker) | **GET** /version |  |
+| [**PostMetadataExtractorWorker**](DefaultApi.md#postmetadataextractorworker) | **POST** / |  |
+
+<a name="getconfigworker"></a>
+# **GetConfigWorker**
+> void GetConfigWorker ()
+
+
+
+### Example
+```csharp
+using System.Collections.Generic;
+using System.Diagnostics;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Client;
+using Org.OpenAPITools.Model;
+
+namespace Example
+{
+    public class GetConfigWorkerExample
+    {
+        public static void Main()
+        {
+            Configuration config = new Configuration();
+            config.BasePath = "http://localhost";
+            var apiInstance = new DefaultApi(config);
+
+            try
+            {
+                apiInstance.GetConfigWorker();
+            }
+            catch (ApiException  e)
+            {
+                Debug.Print("Exception when calling DefaultApi.GetConfigWorker: " + e.Message);
+                Debug.Print("Status Code: " + e.ErrorCode);
+                Debug.Print(e.StackTrace);
+            }
+        }
+    }
+}
+```
+
+#### Using the GetConfigWorkerWithHttpInfo variant
+This returns an ApiResponse object which contains the response data, status code and headers.
+
+```csharp
+try
+{
+    apiInstance.GetConfigWorkerWithHttpInfo();
+}
+catch (ApiException e)
+{
+    Debug.Print("Exception when calling DefaultApi.GetConfigWorkerWithHttpInfo: " + e.Message);
+    Debug.Print("Status Code: " + e.ErrorCode);
+    Debug.Print(e.StackTrace);
+}
+```
+
+### Parameters
+This endpoint does not need any parameter.
+### Return type
+
+void (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Success |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+<a name="getversionworker"></a>
+# **GetVersionWorker**
+> ModelVersion GetVersionWorker ()
+
+
+
+### Example
+```csharp
+using System.Collections.Generic;
+using System.Diagnostics;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Client;
+using Org.OpenAPITools.Model;
+
+namespace Example
+{
+    public class GetVersionWorkerExample
+    {
+        public static void Main()
+        {
+            Configuration config = new Configuration();
+            config.BasePath = "http://localhost";
+            var apiInstance = new DefaultApi(config);
+
+            try
+            {
+                ModelVersion result = apiInstance.GetVersionWorker();
+                Debug.WriteLine(result);
+            }
+            catch (ApiException  e)
+            {
+                Debug.Print("Exception when calling DefaultApi.GetVersionWorker: " + e.Message);
+                Debug.Print("Status Code: " + e.ErrorCode);
+                Debug.Print(e.StackTrace);
+            }
+        }
+    }
+}
+```
+
+#### Using the GetVersionWorkerWithHttpInfo variant
+This returns an ApiResponse object which contains the response data, status code and headers.
+
+```csharp
+try
+{
+    ApiResponse<ModelVersion> response = apiInstance.GetVersionWorkerWithHttpInfo();
+    Debug.Write("Status Code: " + response.StatusCode);
+    Debug.Write("Response Headers: " + response.Headers);
+    Debug.Write("Response Body: " + response.Data);
+}
+catch (ApiException e)
+{
+    Debug.Print("Exception when calling DefaultApi.GetVersionWorkerWithHttpInfo: " + e.Message);
+    Debug.Print("Status Code: " + e.ErrorCode);
+    Debug.Print(e.StackTrace);
+}
+```
+
+### Parameters
+This endpoint does not need any parameter.
+### Return type
+
+[**ModelVersion**](ModelVersion.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Success |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+<a name="postmetadataextractorworker"></a>
+# **PostMetadataExtractorWorker**
+> List&lt;MetadataOutput&gt; PostMetadataExtractorWorker (System.IO.Stream file, string identifier = null, string config = null, string creationDate = null, string modificationDate = null)
+
+
+
+### Example
+```csharp
+using System.Collections.Generic;
+using System.Diagnostics;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Client;
+using Org.OpenAPITools.Model;
+
+namespace Example
+{
+    public class PostMetadataExtractorWorkerExample
+    {
+        public static void Main()
+        {
+            Configuration config = new Configuration();
+            config.BasePath = "http://localhost";
+            var apiInstance = new DefaultApi(config);
+            var file = new System.IO.MemoryStream(System.IO.File.ReadAllBytes("/path/to/file.txt"));  // System.IO.Stream | 
+            var identifier = "identifier_example";  // string | File Identifier (optional) 
+            var config = "config_example";  // string | Object defining the utilized configuration (try \\\"/defaultConfig\\\" to get the structure) (optional) 
+            var creationDate = "creationDate_example";  // string | Creation Date (Time) (e.g. \\\"2022-09-15T09:27:17.3550000+02:00\\\") (optional) 
+            var modificationDate = "modificationDate_example";  // string | Modification Date (Time) (e.g. \\\"2022-09-15T09:27:17.3550000+02:00\\\") (optional) 
+
+            try
+            {
+                List<MetadataOutput> result = apiInstance.PostMetadataExtractorWorker(file, identifier, config, creationDate, modificationDate);
+                Debug.WriteLine(result);
+            }
+            catch (ApiException  e)
+            {
+                Debug.Print("Exception when calling DefaultApi.PostMetadataExtractorWorker: " + e.Message);
+                Debug.Print("Status Code: " + e.ErrorCode);
+                Debug.Print(e.StackTrace);
+            }
+        }
+    }
+}
+```
+
+#### Using the PostMetadataExtractorWorkerWithHttpInfo variant
+This returns an ApiResponse object which contains the response data, status code and headers.
+
+```csharp
+try
+{
+    ApiResponse<List<MetadataOutput>> response = apiInstance.PostMetadataExtractorWorkerWithHttpInfo(file, identifier, config, creationDate, modificationDate);
+    Debug.Write("Status Code: " + response.StatusCode);
+    Debug.Write("Response Headers: " + response.Headers);
+    Debug.Write("Response Body: " + response.Data);
+}
+catch (ApiException e)
+{
+    Debug.Print("Exception when calling DefaultApi.PostMetadataExtractorWorkerWithHttpInfo: " + e.Message);
+    Debug.Print("Status Code: " + e.ErrorCode);
+    Debug.Print(e.StackTrace);
+}
+```
+
+### Parameters
+
+| Name | Type | Description | Notes |
+|------|------|-------------|-------|
+| **file** | **System.IO.Stream****System.IO.Stream** |  |  |
+| **identifier** | **string** | File Identifier | [optional]  |
+| **config** | **string** | Object defining the utilized configuration (try \\\&quot;/defaultConfig\\\&quot; to get the structure) | [optional]  |
+| **creationDate** | **string** | Creation Date (Time) (e.g. \\\&quot;2022-09-15T09:27:17.3550000+02:00\\\&quot;) | [optional]  |
+| **modificationDate** | **string** | Modification Date (Time) (e.g. \\\&quot;2022-09-15T09:27:17.3550000+02:00\\\&quot;) | [optional]  |
+
+### Return type
+
+[**List&lt;MetadataOutput&gt;**](MetadataOutput.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: multipart/form-data
+ - **Accept**: application/json
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **400** | Bad Request |  -  |
+| **200** | Success |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+

src/OpenApiGeneratedConnector/docs/MetadataOutput.md

+# Org.OpenAPITools.Model.MetadataOutput
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**Identifier** | **string** |  | [optional] 
+**Metadata** | **string** |  | [optional] 
+**Text** | **string** |  | [optional] 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+

src/OpenApiGeneratedConnector/docs/ModelVersion.md

+# Org.OpenAPITools.Model.ModelVersion
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**_Version** | **string** |  | [optional] 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+

src/OpenApiGeneratedConnector/git_push.sh

+#!/bin/sh
+# ref: https://help.github.com/articles/adding-an-existing-project-to-github-using-the-command-line/
+#
+# Usage example: /bin/sh ./git_push.sh wing328 openapi-petstore-perl "minor update" "gitlab.com"
+
+git_user_id=$1
+git_repo_id=$2
+release_note=$3
+git_host=$4
+
+if [ "$git_host" = "" ]; then
+    git_host="github.com"
+    echo "[INFO] No command line input provided. Set \$git_host to $git_host"
+fi
+
+if [ "$git_user_id" = "" ]; then
+    git_user_id="GIT_USER_ID"
+    echo "[INFO] No command line input provided. Set \$git_user_id to $git_user_id"
+fi
+
+if [ "$git_repo_id" = "" ]; then
+    git_repo_id="GIT_REPO_ID"
+    echo "[INFO] No command line input provided. Set \$git_repo_id to $git_repo_id"
+fi
+
+if [ "$release_note" = "" ]; then
+    release_note="Minor update"
+    echo "[INFO] No command line input provided. Set \$release_note to $release_note"
+fi
+
+# Initialize the local directory as a Git repository
+git init
+
+# Adds the files in the local repository and stages them for commit.
+git add .
+
+# Commits the tracked changes and prepares them to be pushed to a remote repository.
+git commit -m "$release_note"
+
+# Sets the new remote
+git_remote=$(git remote)
+if [ "$git_remote" = "" ]; then # git remote not defined
+
+    if [ "$GIT_TOKEN" = "" ]; then
+        echo "[INFO] \$GIT_TOKEN (environment variable) is not set. Using the git credential in your environment."
+        git remote add origin https://${git_host}/${git_user_id}/${git_repo_id}.git
+    else
+        git remote add origin https://${git_user_id}:"${GIT_TOKEN}"@${git_host}/${git_user_id}/${git_repo_id}.git
+    fi
+
+fi
+
+git pull origin master
+
+# Pushes (Forces) the changes in the local repository up to the remote repository
+echo "Git pushing to https://${git_host}/${git_user_id}/${git_repo_id}.git"
+git push origin master 2>&1 | grep -v 'To https'