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https://issues.apache.org/jira/browse/MARMOTTA-593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14576527#comment-14576527
]
ASF GitHub Bot commented on MARMOTTA-593:
-----------------------------------------
Github user ansell commented on a diff in the pull request:
https://github.com/apache/marmotta/pull/12#discussion_r31883190
--- Diff:
commons/marmotta-sesame-tools/marmotta-rio-api/src/main/java/org/apache/marmotta/commons/sesame/rio/rdfhdt/RDFHDTFormat.java
---
@@ -0,0 +1,20 @@
+package org.apache.marmotta.commons.sesame.rio.rdfhdt;
+
+import java.util.Arrays;
+
+import org.openrdf.rio.RDFFormat;
+
+/**
+ * HDT (Header, Dictionary, Triples) is a compact data structure and binary
+ * serialization format for RDF that keeps big datasets compressed to save
space
+ * while maintaining search and browse operations without prior
decompression.
+ * <p/>
+ * Author: Junyue Wang
+ */
+public class RDFHDTFormat {
+
+ public static final RDFFormat FORMAT = new RDFFormat("RDFHDT",
+ Arrays.asList("application/rdf+hdt"), null,
Arrays.asList("hdt"),
+ false, false);
--- End diff --
Both of the false values on this line should be true, as RDF/HDT supports
both Graphs (Context in Sesame terminology) and Namespaces.
> RDF HDT implementation for Sesame RIO
> -------------------------------------
>
> Key: MARMOTTA-593
> URL: https://issues.apache.org/jira/browse/MARMOTTA-593
> Project: Marmotta
> Issue Type: Task
> Components: KiWi Triple Store
> Reporter: Sergio Fernández
> Labels: gsoc, gsoc2015, hdt, java, linkeddata, rdf, sesame
> Original Estimate: 480h
> Remaining Estimate: 480h
>
> [RDF HDT|http://www.rdfhdt.org] is a compact data structure and binary
> serialization format for RDF that keeps big datasets compressed to save space
> while maintaining search and browse operations without prior decompression.
> This makes it an ideal format for storing and sharing RDF datasets on the Web.
> Currently the [Java
> Implementation|http://www.rdfhdt.org/manual-of-the-java-hdt-library/] only
> provides bindings for jena RIOT, with a license that does not enable it to be
> integrated into the main Sesame codebase, or any Apache codebase.
> The idea consist on implementing an Apache licensed implementation of RDF HDT
> from scratch and support the [Sesame
> RIO|http://rdf4j.org/sesame/2.8/apidocs/org/openrdf/rio/Rio.html]
> infrastructure (RDFParser/RDFWriter/RDFHandler).
> The implementation would require to have good knowledge of Java programming,
> plus some basic understanding of parsers concepts and the RDF and HDT data
> models.
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