Context Navigation

http://4store.org/trac/wiki/Documentation

Installation

For Mac OS X with MacPorts? user.

git clone git@github.com:nakao/4store.git
cd 4store
./configure

port install pkg-config
port install raptor  
port install rasqal  
port install glib2 
port install libxml2 
port install pcre 
port install ncurses  
port instal readline  
port install zlib

+universal variant configuration may be useful. Install

./configure
make
make test

Making a Mac .dmg package

make macdmg

Install

sudo make install

Usage

4store Commands

$ ls /Applications/4store.app/Contents/MacOS/bin/
4s-backend*          4s-cluster-create*               4s-httpd*
4s-backend-copy*     4s-cluster-destroy*              4s-import*
4s-backend-destroy*  4s-cluster-file-backup*          4s-info*
4s-backend-info*     4s-cluster-info*                 4s-query*
4s-backend-passwd*   4s-cluster-replication-disable*  4s-resolve*
4s-backend-setup*    4s-cluster-start*                4s-restore*
4s-bind*             4s-cluster-stop*                 4s-reverse-bind*
4s-cluster-cache*    4s-delete-model*                 4s-size*
4s-cluster-copy*     4s-dump*                         4s-update*

To setup a knowledge base (named demo) by 4s-backend-setup http://4store.org/trac/wiki/CreateDatabase

$ 4s-backend-setup demo
4store[39388]: backend-setup.c:176 erased files for KB demo
4store[39388]: backend-setup.c:301 created RDF metadata for KB demo

You can find the database files at /var/lib/4store/demo .

To boot a backend process by 4s-backend

4s-backend demo

To import triples by 4s-import http://4store.org/trac/wiki/ImportData

curl -O 
$ 4s-import -v demo data/tiger/tiger_features.rdf
removing old data
Reading <file:///Users/nakao/Applications/4store/4store/data/tiger/tiger_features.rdf>;
Pass 1, processed 748 triples (748)
Pass 2, processed 748 triples, 90250 triples/s
Updating index
Index update took 1.469478 seconds
Imported 748 triples, average 505 triples/s

4s-query is a interactive query shell http://4store.org/trac/wiki/Query

$ 4s-query demo4store> SELECT * WHERE {?s ?p ?o}
#EOQ
?s     ?p     ?o
<http://www.census.gov/tiger/2002/CFCC/D85>;     <http://www.w3.org/2000/01/rdf-schema#subClassOf>;     <http://www.census.gov/tiger/2002/CFCC/D8>;
<http://www.census.gov/tiger/2002/CFCC/F40>;     <http://www.w3.org/2000/01/rdf-schema#subClassOf>;     <http://www.census.gov/tiger/2002/CFCC/F4>;
<http://www.census.gov/tiger/2002/CFCC/E0>;     <http://www.w3.org/2000/01/rdf-schema#subClassOf>;     <http://www.census.gov/tiger/2002/CFCC/E>;

Ctrl+D

To query in one-liner

$ 4s-query demo 'SELECT * WHERE { ?s ?p ?o } LIMIT 1'
<?xml version="1.0"?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#">;
  <head>
    <variable name="s"/>
    <variable name="p"/>
    <variable name="o"/>
  </head>
  <results>
    <result>
      <binding name="s"><uri>http://www.census.gov/tiger/2002/CFCC/D85</uri></binding>;
      <binding name="p"><uri>http://www.w3.org/2000/01/rdf-schema#subClassOf</uri></binding>;
      <binding name="o"><uri>http://www.census.gov/tiger/2002/CFCC/D8</uri></binding>;
    </result>
  </results>
</sparql>

in JSON format

$ 4s-query -f json demo 'SELECT * WHERE { ?s ?p ?o } LIMIT 1'
{"head":{"vars":["s","p","o"]},
 "results": {
  "bindings":[
   {"s":{"type":"uri","value":"http://www.census.gov/tiger/2002/CFCC/D85";},
    "p":{"type":"uri","value":"http://www.w3.org/2000/01/rdf-schema#subClassOf";},
    "o":{"type":"uri","value":"http://www.census.gov/tiger/2002/CFCC/D8";}}
  ]
 }}

Serializing SPARQL Query Results in JSON

in SPARQL-RESULTS format

$ 4s-query -f sparql demo 'SELECT * WHERE { ?s ?p ?o } LIMIT 1'
<?xml version="1.0"?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#">;
  <head>
    <variable name="s"/>
    <variable name="p"/>
    <variable name="o"/>
  </head>
  <results>
    <result>
      <binding name="s"><uri>http://www.census.gov/tiger/2002/CFCC/D85</uri></binding>;
      <binding name="p"><uri>http://www.w3.org/2000/01/rdf-schema#subClassOf</uri></binding>;
      <binding name="o"><uri>http://www.census.gov/tiger/2002/CFCC/D8</uri></binding>;
    </result>
  </results>
</sparql>

SPARQL Query Results XML Format

in a text format

$ 4s-query -f text demo 'SELECT * WHERE { ?s ?p ?o } LIMIT 1'
?s     ?p     ?o
<http://www.census.gov/tiger/2002/CFCC/D85>;     <http://www.w3.org/2000/01/rdf-schema#subClassOf>;     <http://www.census.gov/tiger/2002/CFCC/D8>;

in RDF test case format (Turtle)

$ 4s-query -f testcase demo 'SELECT * WHERE { ?s ?p ?o } LIMIT 1'
@prefix rs: <http://www.w3.org/2001/sw/DataAccess/tests/result-set#>; .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>; .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#>; .

[] rdf:type rs:ResultSet ;
   rs:resultVariable "s", "p", "o" ;
   rs:solution [
      rs:binding [ rs:variable "s" ;
                   rs:value <http://www.census.gov/tiger/2002/CFCC/D85> ] ;
      rs:binding [ rs:variable "p" ;
                   rs:value <http://www.w3.org/2000/01/rdf-schema#subClassOf> ] ;
      rs:binding [ rs:variable "o" ;
                   rs:value <http://www.census.gov/tiger/2002/CFCC/D8> ]
   ] .

Turtle

4s-httpd for a SPARQL endpoint

$ 4s-httpd -p 8000 demo

RESTful interface

PUT

$ curl -T file.rdf http://localhost:8000/sparql/file.rdf

DELETE

$ curl -X DELETE http://localhost:8000/sparql/file.rdf

Note: http://4store.org/trac/wiki/TODO

Connecting from script language

http://4store.org/trac/wiki/ClientLibraries available php, python, ruby and Java (no Perl)

To install the ruby client

$ gem build 4store-ruby.gemspec
WARNING:  no rubyforge_project specified
  Successfully built RubyGem
  Name: 4store-ruby
  Version: 0.0.3
  File: 4store-ruby-0.0.3.gem
$ sudo gem install 4store-ruby-0.0.3.gem

Usage

>> require 'four_store/store'
=> true
>> FourStore
=> FourStore
>> FourStore::Store
=> FourStore::Store
>> ep = FourStore::Store.new("http://localhost:8000/sparql/")
=> #<FourStore::Store:0x101763890 @endpoint=#<URI::HTTP:0x101763548 URL:http://localhost:8000/sparql/>>;
>> res = ep.select("SELECT * WHERE { ?s ?p ?o } LIMIT 10")
?> "
"
=> "\n"
>> require 'pp'
=> true
>> pp res
[{"o"=>"http://www.census.gov/tiger/2002/CFCC/D8";,
  "p"=>"http://www.w3.org/2000/01/rdf-schema#subClassOf";,
  "s"=>"http://www.census.gov/tiger/2002/CFCC/D85";},
 {"o"=>"http://www.census.gov/tiger/2002/CFCC/F4";,
  "p"=>"http://www.w3.org/2000/01/rdf-schema#subClassOf";,
  "s"=>"http://www.census.gov/tiger/2002/CFCC/F40";},
 {"o"=>"http://www.census.gov/tiger/2002/CFCC/E";,
  "p"=>"http://www.w3.org/2000/01/rdf-schema#subClassOf";,
  "s"=>"http://www.census.gov/tiger/2002/CFCC/E0";},
 {"o"=>"http://www.census.gov/tiger/2002/CFCC/B";,
  "p"=>"http://www.w3.org/2000/01/rdf-schema#subClassOf";,
  "s"=>"http://www.census.gov/tiger/2002/CFCC/B4";},
 {"o"=>"http://www.census.gov/tiger/2002/CFCC/D2";,
  "p"=>"http://www.w3.org/2000/01/rdf-schema#subClassOf";,
  "s"=>"http://www.census.gov/tiger/2002/CFCC/D27";},
 {"o"=>"http://www.census.gov/tiger/2002/CFCC/A";,
  "p"=>"http://www.w3.org/2000/01/rdf-schema#subClassOf";,
  "s"=>"http://www.census.gov/tiger/2002/CFCC/A5";},
 {"o"=>"http://www.census.gov/tiger/2002/CFCC/A2";,
  "p"=>"http://www.w3.org/2000/01/rdf-schema#subClassOf";,
  "s"=>"http://www.census.gov/tiger/2002/CFCC/A21";},
 {"o"=>"http://www.census.gov/tiger/2002/CFCC/H7";,
  "p"=>"http://www.w3.org/2000/01/rdf-schema#subClassOf";,
  "s"=>"http://www.census.gov/tiger/2002/CFCC/H70";},
 {"o"=>"http://www.census.gov/tiger/2002/CFCC/B5";,
  "p"=>"http://www.w3.org/2000/01/rdf-schema#subClassOf";,
  "s"=>"http://www.census.gov/tiger/2002/CFCC/B52";},
 {"o"=>"http://www.census.gov/tiger/2002/CFCC/D4";,
  "p"=>"http://www.w3.org/2000/01/rdf-schema#subClassOf";,
  "s"=>"http://www.census.gov/tiger/2002/CFCC/D43";}]
=> nil

Methods in FourStore::Store class.

>> FourStore::Store.instance_methods - Object.methods
=> ["delete", "add", "set", "select", "load"]

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