Rudimentary RDF parser for http://stackoverflow.com/questions/42741218/using-python-to-query-ibm-rational-change

main.py

import rdflib
from rdflib import URIRef
from rdflib.namespace import RDF
g=rdflib.Graph()
g.load('https://example.com/pror/services/catalog/singleton')

def compact_predicate(p):
    table = {
        "http://www.w3.org/1999/02/22-rdf-syntax-ns#": "rdf:",
        "http://open-services.net/ns/core#": "oslc_core:",
        "http://purl.org/dc/terms/": "dcterms:"
    }
    p_str = str(p)
    for k,v in table.items():
        if p_str.startswith(k):
            return p_str.replace(k, v)

class ServiceProviderCatalog():
    TYPE_URI = URIRef(u"http://open-services.net/ns/core#ServiceProviderCatalog")

    def __init__(self, s, graph_tuples):
        self.tuples = {}
        self.tuples_compact = {}
        for p,o in graph_tuples:
            self.tuples[p] = o
            pred = compact_predicate(p)
            # TODO handle multiple objects automatically
            if pred != "oslc_core:serviceProvider":
                self.tuples_compact[pred] = o
            else:
                # TODO Recursively construct the RDF resource tree
                if pred in self.tuples_compact:
                    self.tuples_compact[pred].append(o)
                else:
                    self.tuples_compact[pred] = [o]

    def __str__(self):
        # TODO Handle missing predicates
        s = "Service Provider Catalog '%s'\n" % self.tuples_compact["dcterms:title"]
        for v in self.tuples_compact["oslc_core:serviceProvider"]:
            s += "\t Service Provider '%s'\n" % (v)
        for k, v in self.tuples_compact.items():
            if k!= "oslc_core:serviceProvider":
                s += "\t %s = %s\n" % (k, v)
        return s

for s,p,o in g.triples( (None,  RDF.type, ServiceProviderCatalog.TYPE_URI) ):
    print(ServiceProviderCatalog(s, g.predicate_objects(s)))

# for s,p,o in g:
    # print(s,p,o)

output.txt

$ python main.py
Service Provider Catalog 'Service Provider Catalog'
	 Service Provider 'https://example.com/pror/services/rm-services/AAA.reqif'
	 Service Provider 'https://example.com/pror/services/rm-services/BBB.reqif'
	 dcterms:title = Service Provider Catalog
	 dcterms:description =
	 oslc_core:domain = http://open-services.net/ns/rm#
	 rdf:type = http://open-services.net/ns/core#ServiceProviderCatalog