Details
- Vendor
- Apache Software Foundation
- Type
- RDF
- Category
- Emerging
- Status
- Inactive — Project retired to the Apache Attic. Repository archived in May 2021.
- License
- Apache-2.0
- Language
- Java
- Query Languages
- SPARQL
- Protocols
- HTTP/RESTSPARQL Protocol
Apache Marmotta KiWi
An RDF triple store backend for Apache Marmotta that translates SPARQL directly to SQL for execution against PostgreSQL, MySQL, or H2. Built on the Sesame/RDF4J Sail API with support for named graphs, versioning, and rule-based reasoning via sKWRL.
- Overall rank
- #97
- First released
- October 2010
- License
- Apache-2.0
- Built with
- Java
Details
Sources 7 references
Protocols SPARQL Protocol, HTTP/REST
KiWi itself is an embeddable Sesame Sail library (no wire protocol of its own); the network-facing protocols come from the Apache Marmotta platform that hosts it as its default backend. Accepted pass_A's HTTP/REST because Marmotta's LDP module is a separate, documented, non-SPARQL HTTP API (resource CRUD via POST/GET), not just SPARQL-over-HTTP; rejected pass_B's SPARQL-only list. Both projects are retired to the Apache Attic.
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Execute SPARQL query (both query and update) on the LMF triple store according the SPARQL 1.1 Protocol
SparqlWebService (Apache Marmotta Site 3.3.0 API) · reviewed 2026-08-02 -
Since 3.2.0 Marmotta provides experimental support for the current working draft of the Linked Data Platform 1.0 specification.
Apache Marmotta - Platform - LDP · reviewed 2026-08-02 -
The KiWi triple store is composed of a number of Sesame Sail modules that can be combined and stacked as needed.
Apache Marmotta - KiWi Triple Store · reviewed 2026-08-02
License Apache-2.0
SPDX identifier as classified by GitHub from the repository licence file.
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"spdx_id": "Apache-2.0"
GitHub licence API — apache/marmotta · reviewed 2026-08-02
Released 2010-10
Corrects current value of 2012, which reflects Apache Marmotta's Apache Incubator entry rather than the KiWi triplestore itself. KiWi 1.0, the first public open-source release including the triplestore, launched on 14 October 2010, two years before Marmotta was contributed to Apache.
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The 14th of October 2010 was a very special date for the KiWi project: After more than two and a half years of development version 1.0 of our collaborative knowledge management software was published.
KiWi Release Party - Karsten Jahn · reviewed 2026-08-02 -
This booklet, accompanying the KiWi 1.0 release, aims to summarize the key features offered by the platform and provide you with background information.
KiWi: A Platform for Building Semantic Social Media Applications · reviewed 2026-08-02
Language Java
Confirms current value; the Marmotta Platform architecture documentation states the KiWi triplestore is one of the Java libraries providing the model/persistence layer.
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the model layer offers persistence and data access functionality; this is in most cases provided by normal Java libraries (kiwi, ldcache, ldclient, commons from Marmotta, Sesame Repository, etc)
Apache Marmotta - Platform · reviewed 2026-08-02