#!/bin/env python

import joseki

from sys import stdout
from joseki import JosekiRequest
from rdflib.URIRef import URIRef
from rdflib.Namespace import Namespace

# A better name for the "wildcard" in a triple match
ANY = None

# Declare constants: better to use namespaces
DC = Namespace("http://purl.org/dc/elements/1.1/")
dcTitle = DC['title']

# The target model URL
# This is the Joseki online demo
modelURL = "http://jena.hpl.hp.com:2020/books"

book1 = URIRef("http://example.org/book/book1")
book2 = URIRef("http://example.org/book/book2")
book3 = URIRef("http://example.org/book/book3")
book4 = URIRef("http://example.org/book/book4")
book5 = URIRef("http://example.org/book/book5")

# ----------------------------------------

print "==== Example 6 - RDQL query / bound variable results"
print "==== Get the titles of the books"


rdql="SELECT ?book, ?title WHERE "+\
        "(?book <http://purl.org/dc/elements/1.1/title> ?title)"

store = joseki.query(modelURL, "RDQL", q=rdql, format="BV")
store.prefix_mapping("rs", "http://jena.hpl.hp.com/2003/03/result-set#")
store.output(stdout)