See the Fuseki2 documentation.

This page covers Fuseki v1.
Fuseki1 is deprecated and has been retired.
The last release of Jena with this module is Jena 3.9.0.

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Fuseki is a SPARQL server. It provides REST-style SPARQL HTTP Update, SPARQL Query,and SPARQL Update using the SPARQL protocol over HTTP.

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The relevant SPARQL standards are:

Contents

Download Fuseki1

Binaries for Fuseki1 are available from themavenrepositories.

The source code is available in the Apache Jena source release.

Getting Started With Fuseki

This section provides a brief guide to getting up and running witha simple server installation. It uses theSOH (SPARQL over HTTP) scripts included in thedownload.

1. Download the latest jena-fuseki-*-distribution

2. Unpack the downloaded file with unzip or tar zxfv

3. Move into the newly-created apache-jena-fuseki-* directory

4. (Linux) chmod +x fuseki-server bin/s-*

5. Run a server

   ./fuseki-server –update –mem /ds

The server logging goes to the console:

User Interface

The Fuseki download includes a number of services:

• SPARQL Query, SPARQL Update, and file upload to a selecteddataset.
• Link to the documentation (here).
• Validators for SPARQL query and update and for non-RDF/XMLformats.

For the control panel:

1. In a browser, go to http://localhost:3030/
2. Click on Control Panel
3. Select the dataset (if set up above, there is only one choice).

The page offers SPARQL operations and file upload acting on theselected dataset.

Script Control

In a new window:

Load some RDF data into the default graph of the server:

Get it back:

Query it with SPARQL using the …/query endpoint.

Update it with SPARQL using the …/update endpoint.

Security and Access Control

Fuseki does not currently offer security and access control itself.

Authentication and control of the number of concurrent requests canbe added using an Apache server and either blocking the Fuseki portto outside traffic (e.g. on Amazon’s EC2) or by listening only thelocalhost network interface. This is especially important for updateendpoints (SPARQL Update, SPARQL Graph Store protocol withPUT/POST/DELETE enabled).

Data can be updated without access control if the server is startedwith the --update argument. If started without that argument, datais read-only.

Logging

Fuseki usesLog4Jfor logging. There are two main logging channels:

1. The general server messages: org.apache.jena.fuseki.Server
2. A channel for all request messages: org.apache.jena.fuseki.Fuseki

The default settings are (this is an extract of a log4j propertiesfile):

Server URI scheme

This details the service URIs for Fuseki:

• http://*host*/dataset/query – the SPARQL query endpoint.
• http://*host*/dataset/update – the SPARQL Update languageendpoint.
• http://*host*/dataset/data – the SPARQL Graph Store Protocolendpoint.
• http://*host*/dataset/upload – the file upload endpoint.

Where dataset is a URI path. Note that Fuseki defaults to usingport 3030 so host is often localhost:3030.

Important - While you may set dataset to be the text dataset this should be avoided since it may interfere with the function of the control panel and web pages.

The URIhttp://host/dataset/sparqlis currently mapped to /query but this may change to being ageneral purpose SPARQL query endpoint.

Running a Fuseki Server

The server can be run with the script fuseki-server. Common formsare:

There is an option --port=PORT to set the port number. Itdefaults to 3030.

/DatasetPathName is the name under which the dataset will beaccessible over HTTP. Please see the above section on Server URI scheme for notes regarding available URIs and choice of this name

The server will service read requests only unless the --updateargument is used.

The full choice of dataset forms is:

Fuseki Dataset Descriptions

• --mem
  Create an empty, in-memory (non-persistent) dataset.
• --file=FILE
  Create an empty, in-memory (non-persistent) dataset, then load FILEinto it.
• --loc=DIR
  Use an existing TDB database. Create an empty one if it does notexist.
• --desc=assemblerFile
  Construct a dataset based on the general assembler description.
• --config=ConfigFile
  Construct one or more service endpoints based on theconfiguration description.

A copy of TDB is included in the standalone server. An exampleassembler file for TDB is in tdb.ttl.

Fuseki Server Arguments

• --help
  Print help message.
• --port=*number*
  Run on port number (default is 3030).
• --localhost
  Listen only to the localhost network interface.
• --update
  Allow update. Otherwise only read requests are served (ignored if a configuration file is given).

Fuseki Server starting with an empty dataset

runs the server on port 3030 with an in-memory dataset. It can beaccessed via the appropriate protocol at the following URLs:

• SPARQL query: http://localhost:3030/ds/query
• SPARQL update: http://localhost:3030/ds/update
• SPARQL HTTP update: http://localhost:3030/ds/data

The SPARQL Over HTTP scripts take care of namingand protocol details. For example, to load in a file data.rdf:

Fuseki Server and TDB

Fuseki includes a built-in version of TDB. Run the server with the--desc argument

and a database in the directory DB, an assembler description of:

The form:

is a shorthand for such an assembler with location DB.

To make triples from all the named graphs appear as the default,unnamed graph, use:

Fuseki Server and general dataset descriptions

The Fuseki server can be given anassembler descriptionto build a variety of model and datasets types.

Full details of setting up models assembler is given in theassembler documentation and assembler howto.

Rdf Editor Tool

A general dataset is described by:

The models can beJena inference models.

Fuseki Configuration File

A Fuseki server can be set up using a configuration file. Thecommand-line arguments for publishing a single dataset are a shortcut that, internally, builds a default configuration based on thedataset name given.

The configuration is an RDF graph. One graph consists of one serverdescription, with a number of services, and each service offers anumber of endpoints over a dataset.

The example below is all one file (RDF graph in Turtle syntax)split to allow for commentary.

Prefix declarations

Some useful prefix declarations:

Server Section

Order of the file does not matter to the machine, but it’s usefulto start with the server description, then each of the serviceswith its datasets.

Assembler Initialization

All datasets are described byassembler descriptions.Assemblers provide an extensible way of describing many kinds ofobjects. Set up any assembler extensions - here, the TDB assemblersupport.

Service 1

This service offers SPARQL Query, SPARQL Update and SPARQL GraphStore protocol, as well as file upload, on an in-memory dataset.Initially, the dataset is empty.

Service 2

This service offers a number of endpoints. It is read-only, becauseonly read-only endpoints are defined (SPARQL Query and HTTP GETSPARQl Graph Store protocol). The dataset is a single in-memorygraph:

This service offers read-only access to a dataset with a singlegraph of data.

Service 3

This service offers SPARQL query access only to a TDB database. TheTDB database can have specific features set, such as query timeoutor making the default graph the union of all named graphs.

SPARQL Over HTTP

SOH (SPARQL Over HTTP) is a set of command-line scripts forworking with SPARQL 1.1. SOH is server-independent and will workwith any compliant SPARQL 1.1 system offering HTTP access.

See the SPARQL Over HTTP page.

Examples

Use from Java

SPARQL Query

ARQ’s QueryExecutionFactory.sparqlService can be used.

SPARQL Update

See UpdateExecutionFactory.createRemote

SPARQL HTTP

See DatasetAccessor

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