def __get_num_triples_in_database(self):
query = """
SELECT (COUNT(*) AS ?no) { ?s ?p ?o }
"""
result = sparql.query(query,self.__url_query)
numResults = result["results"]["bindings"][0]["no"]["value"]
return numResults
def convert_value(self,source_unit_url,destination_unit_url,source_value):
if not self.get_unit_class(source_unit_url) == self.get_unit_class(destination_unit_url):
raise ValueError
query = '''
PREFIX qudt: <http://qudt.org/schema/qudt#>
SELECT
?sou_offset ?sou_mult ?des_offset ?des_mult
WHERE
{{
<{source}> qudt:conversionOffset ?sou_offset.
<{source}> qudt:conversionMultiplier ?sou_mult.
<{destin}> qudt:conversionOffset ?des_offset.
<{destin}> qudt:conversionMultiplier ?des_mult.
}}'''
take = lambda x: (float(x["results"]["bindings"][0]["sou_offset"]["value"]),
float(x["results"]["bindings"][0]["sou_mult"]["value"]),
float(x["results"]["bindings"][0]["des_offset"]["value"]),
float(x["results"]["bindings"][0]["des_mult"]["value"]))
result = sparql.query(query.format(source = source_unit_url,
destin = destination_unit_url),self.__url_query)
if result["results"]["bindings"] == []: raise ValueError
sou_offset,sou_mult,des_offset,des_mult = take(result)
des_value = ((sou_offset - des_offset) + float(source_value)) * sou_mult / float(des_mult)
return des_value
def convert_value(self, source_unit_url, destination_unit_url,
source_value):
if not self.get_unit_class(source_unit_url) == self.get_unit_class(
destination_unit_url):
raise ValueError
query = '''
PREFIX qudt: <http://qudt.org/schema/qudt#>
SELECT
?sou_offset ?sou_mult ?des_offset ?des_mult
WHERE
{{
<{source}> qudt:conversionOffset ?sou_offset.
<{source}> qudt:conversionMultiplier ?sou_mult.
<{destin}> qudt:conversionOffset ?des_offset.
<{destin}> qudt:conversionMultiplier ?des_mult.
}}'''
take = lambda x: (
float(x["results"]["bindings"][0]["sou_offset"]["value"]),
float(x["results"]["bindings"][0]["sou_mult"]["value"]),
float(x["results"]["bindings"][0]["des_offset"]["value"]),
float(x["results"]["bindings"][0]["des_mult"]["value"]))
result = sparql.query(
query.format(source=source_unit_url, destin=destination_unit_url),
self.__url_query)
if result["results"]["bindings"] == []: raise ValueError
sou_offset, sou_mult, des_offset, des_mult = take(result)
des_value = ((sou_offset - des_offset) +
float(source_value)) * sou_mult / float(des_mult)
return des_value
def __get_num_triples_in_database(self):
query = """
SELECT (COUNT(*) AS ?no) { ?s ?p ?o }
"""
result = sparql.query(query, self.__url_query)
numResults = result["results"]["bindings"][0]["no"]["value"]
return numResults
def get_mult_factor(self, unit):
query = '''
PREFIX qudt: <http://qudt.org/schema/qudt#>
SELECT
?mult
WHERE
{{
<{unit}> qudt:conversionMultiplier ?mult
}}
'''
return sparql.query(query.format(unit = unit),self.__url_query)
def get_offset(self, unit):
query = '''
PREFIX qudt: <http://qudt.org/schema/qudt#>
SELECT
?offset
WHERE
{{
<{unit}> qudt:conversionOffset ?offset.
}}
'''
return sparql.query(query.format(unit = unit),self.__url_query)
def get_units_in_class(self, ClassURL):
query = """PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT
?unit
WHERE
{
?unit rdf:type <%s>
}"""
query = query % ClassURL
result = sparql.query(query, self.__url_query)
return result
def get_units_in_class(self,ClassURL):
query = """PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT
?unit
WHERE
{
?unit rdf:type <%s>
}"""
query = query % ClassURL
result = sparql.query(query, self.__url_query)
return result
def get_mult_factor(self, unit):
query = '''
PREFIX qudt: <http://qudt.org/schema/qudt#>
SELECT
?mult
WHERE
{{
<{unit}> qudt:conversionMultiplier ?mult
}}
'''
return sparql.query(query.format(unit=unit), self.__url_query)
def get_offset(self, unit):
query = '''
PREFIX qudt: <http://qudt.org/schema/qudt#>
SELECT
?offset
WHERE
{{
<{unit}> qudt:conversionOffset ?offset.
}}
'''
return sparql.query(query.format(unit=unit), self.__url_query)
def __get_sym(self, UnitURL):
query = '''
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX qudt: <http://qudt.org/schema/qudt#>
SELECT ?symbol
WHERE
{{
<{unitURL}> qudt:quantityKind ?kind.
?symbol qudt:referenceQuantity ?kind
}}
'''
return sparql.query(query.format(unitURL=UnitURL), self.__url_query)
def __get_sym(self, UnitURL):
query = '''
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX qudt: <http://qudt.org/schema/qudt#>
SELECT ?symbol
WHERE
{{
<{unitURL}> qudt:quantityKind ?kind.
?symbol qudt:referenceQuantity ?kind
}}
'''
return sparql.query(query.format(unitURL = UnitURL),self.__url_query)
def get_unit_class(self, UnitURL):
query = """PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
SELECT
?class
WHERE
{
<%s> rdf:type ?class.
FILTER NOT EXISTS{?class rdf:type owl:DeprecatedClass}
}"""
query = query % UnitURL
result = sparql.query(query, self.__url_query)
return result
def list_all_unit_classes(self):
query = """ PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT
?class
WHERE
{ <http://qudt.org/schema/qudt#Unit> ^rdfs:subClassOf+ ?class
}"""
result = sparql.query(query, self.__url_query)
unitClasses = []
for item in result["results"]["bindings"]:
classURI = item["class"]["value"]
unitClasses.append(classURI)
return unitClasses
def get_SI_vector(self, si_sym):
query = '''
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX qudt:<http://qudt.org/schema/qudt#>
SELECT ?vec
WHERE
{{
<{si_sym}> qudt:dimensionVector ?vecs.
?vecs qudt:basisElement ?vec.
}}
'''
return sparql.query(query.format(si_sym = si_sym),self.__url_query)
def list_all_unit_classes(self):
query = """ PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT
?class
WHERE
{ <http://qudt.org/schema/qudt#Unit> ^rdfs:subClassOf+ ?class
}"""
result = sparql.query(query,self.__url_query)
unitClasses = []
for item in result["results"]["bindings"]:
classURI = item["class"]["value"]
unitClasses.append( classURI )
return unitClasses
def get_SI_vector(self, si_sym):
query = '''
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX qudt:<http://qudt.org/schema/qudt#>
SELECT ?vec
WHERE
{{
<{si_sym}> qudt:dimensionVector ?vecs.
?vecs qudt:basisElement ?vec.
}}
'''
return sparql.query(query.format(si_sym=si_sym), self.__url_query)
def get_unit_class(self,UnitURL):
query = """PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
SELECT
?class
WHERE
{
<%s> rdf:type ?class.
FILTER NOT EXISTS{?class rdf:type owl:DeprecatedClass}
}"""
query = query %UnitURL
result = sparql.query(query,self.__url_query)
return result
def list_domain_tool_unit_classes(self):
query = """PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX qudt4dt: <http://qudt4dt.org/ontology#>
SELECT
?class
WHERE
{
qudt4dt:DomainToolUnit ^rdfs:subClassOf+ ?class
}"""
result = sparql.query(query, self.__url_query)
unitClasses = []
for item in result["results"]["bindings"]:
classURI = item["class"]["value"]
unitClasses.append(classURI)
return unitClasses
def list_domain_tool_unit_classes(self):
query = """PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX qudt4dt: <http://qudt4dt.org/ontology#>
SELECT
?class
WHERE
{
qudt4dt:DomainToolUnit ^rdfs:subClassOf+ ?class
}"""
result = sparql.query(query, self.__url_query)
unitClasses = []
for item in result["results"]["bindings"]:
classURI = item["class"]["value"]
unitClasses.append( classURI )
return unitClasses
