الأمازون نبتون الانطباعات الأولى

لماذا نحتاج إلى أمازون نبتون

التخصيص

تحميل البيانات

العلاقات في الثلاثات

<http://musicbrainz.foo/artist/${id}> <http://musicbrainz.foo/gid> "${gid}"^^<http://www.w3.org/2001/XMLSchema#string> .
 
 
<http://musicbrainz.foo/artist/${id}> <http://musicbrainz.foo/name> "${name}"^^<http://www.w3.org/2001/XMLSchema#string> .
 
<http://musicbrainz.foo/artist/${id}> <http://musicbrainz.foo/sort-name> "${sort_name}"^^<http://www.w3.org/2001/XMLSchema#string> .
 
<http://musicbrainz.foo/artist/${id}> <http://musicbrainz.foo/begin-date> "${begin_date_year}-${begin_date_month}-${begin_date_day}"^^xsd:<http://www.w3.org/2001/XMLSchema#date> .
 
<http://musicbrainz.foo/artist/${id}> <http://musicbrainz.foo/end-date> "${end_date_year}-${end_date_month}-${end_date_day}"^^xsd:<http://www.w3.org/2001/XMLSchema#date> .
 
<http://musicbrainz.foo/artist/${id}> <http://musicbrainz.foo/type> <http://musicbrainz.foo/artist-type/${type}> .
 
<http://musicbrainz.foo/artist/${id}> <http://musicbrainz.foo/area> <http://musicbrainz.foo/area/${area}> .
 
<http://musicbrainz.foo/artist/${id}> <http://musicbrainz.foo/gender> <http://musicbrainz.foo/gender/${gender}> .
 
<http://musicbrainz.foo/artist/${id}> <http://musicbrainz.foo/comment> "${comment}"^^<http://www.w3.org/2001/XMLSchema#string> .
 
<http://musicbrainz.foo/artist/${id}> <http://musicbrainz.foo/edits-pending> "${edits_pending}"^^<http://www.w3.org/2001/XMLSchema#int> .
 
<http://musicbrainz.foo/artist/${id}> <http://musicbrainz.foo/last-updated> "${last_updated}"^^<http://www.w3.org/2001/XMLSchema#dateTime> .
 
<http://musicbrainz.foo/artist/${id}> <http://musicbrainz.foo/ended> "${ended}"^^<http://www.w3.org/2001/XMLSchema#boolean> .

تحميل مجمع

curl -X POST -H 'Content-Type: application/json' http://your-neptune-cluster:8182/loader -d '{
 
 
 "source" : "s3://your-s3-bucket",
 
 "format" : "ntriples",
 
 "iamRoleArn" : "arn:aws:iam::your-iam-user:role/NeptuneLoadFromS3",
 
 "region" : "eu-west-1",
 
 "failOnError" : "FALSE"
 
}'

{
 
 
 "errorCode" : "PARSING_ERROR",
 
 "errorMessage" : "Content after '.' is not allowed",
 
 "fileName" : [...],
 
 "recordNum" : 25
 
}

جاري التحميل

INSERT DATA { <http://musicbrainz.foo/release-country/737041> <http://musicbrainz.foo/release> <http://musicbrainz.foo/release/435759> };INSERT DATA { <http://musicbrainz.foo/release-country/737041> <http://musicbrainz.foo/date-year> "2018"^^<http://www.w3.org/2001/XMLSchema#int> };

INSERT {
 
 
  ?artist_credit <http://musicbrainz.foo/number-of-releases> ?number_of_releases
 
} WHERE {
 
  SELECT ?artist_credit (COUNT(*) as ?number_of_releases)
 
  WHERE {
 
     ?artist_credit <http://musicbrainz.foo/rdftype> <http://musicbrainz.foo/artist-credit> .
 
     ?release_group <http://musicbrainz.foo/artist-credit> ?artist_credit .
 
     ?release_group <http://musicbrainz.foo/rdftype> <http://musicbrainz.foo/release-group> .
 
     ?release_group <http://musicbrainz.foo/name> ?release_group_name .
 
  }
 
  GROUP BY ?artist_credit
 
}

استعلامات SPARQL

curl -X POST --data-binary 'query=SELECT ?artist ?p ?o where {?artist <http://musicbrainz.foo/name> "Elton John" . ?artist ?p ?o . }' http://your-neptune-cluster:8182/sparql

SELECT
 
 
 ?artist_name ?year
 
 ?releases_in_year ?releases_up_year
 
 ?artist_type_name ?releases
 
 ?artist_gender ?artist_country_name
 
 ?artist_begin_date ?bands
 
 ?bands_in_year
 
WHERE {
 
 # Bands for each artist
 
 {
 
   SELECT
 
     ?year
 
     ?first_artist
 
     (group_concat(DISTINCT ?second_artist_name;separator=",") as ?bands)
 
     (COUNT(DISTINCT ?second_artist_name) AS ?bands_in_year)     
 
   WHERE {
 
     VALUES ?year {
 
       1960 1961 1962 1963 1964 1965 1966 1967 1968 1969
 
       1970 1971 1972 1973 1974 1975 1976 1977 1978 1979
 
       1980 1981 1982 1983 1984 1985 1986 1987 1988 1989
 
       1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
 
       2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
 
       2010 2011 2012 2013 2014 2015 2016 2017 2018
 
     }   
 
     ?first_artist <http://musicbrainz.foo/name> "Elton John" .
 
     ?first_artist <http://musicbrainz.foo/rdftype> <http://musicbrainz.foo/artist> .
 
     ?first_artist <http://musicbrainz.foo/type> ?first_artist_type .
 
     ?first_artist <http://musicbrainz.foo/name> ?first_artist_name .
 

 
 
     ?second_artist <http://musicbrainz.foo/rdftype> <http://musicbrainz.foo/artist> .
 
     ?second_artist <http://musicbrainz.foo/type> ?second_artist_type .
 
     ?second_artist <http://musicbrainz.foo/name> ?second_artist_name .
 
     optional { ?second_artist <http://musicbrainz.foo/begin-date-year> ?second_artist_begin_date_year . }
 
     optional { ?second_artist <http://musicbrainz.foo/end-date-year> ?second_artist_end_date_year . }
 

 
 
     ?l_artist_artist <http://musicbrainz.foo/entity0> ?first_artist .
 
     ?l_artist_artist <http://musicbrainz.foo/entity1> ?second_artist .
 
     ?l_artist_artist <http://musicbrainz.foo/link> ?link .
 

 
 
     optional { ?link <http://musicbrainz.foo/begin-date-year> ?link_begin_date_year . }
 
     optional { ?link <http://musicbrainz.foo/end-date-year> ?link_end_date_year . }
 

 
 
     FILTER (!bound(?link_begin_date_year) || ?link_begin_date_year <= ?year)
 
     FILTER (!bound(?link_end_date_year) || ?link_end_date_year >= ?year)
 
     FILTER (!bound(?second_artist_begin_date_year) || ?second_artist_begin_date_year <= ?year)
 
     FILTER (!bound(?second_artist_end_date_year) || ?second_artist_end_date_year >= ?year)
 
     FILTER (?first_artist_type NOT IN (<http://musicbrainz.foo/artist-type/2>, <http://musicbrainz.foo/artist-type/5>, <http://musicbrainz.foo/artist-type/6>))
 
     FILTER (?second_artist_type IN (<http://musicbrainz.foo/artist-type/2>, <http://musicbrainz.foo/artist-type/5>, <http://musicbrainz.foo/artist-type/6>))
 
   }
 
   GROUP BY ?first_artist ?year
 
 }
 
 # Releases up to a year
 
 {
 
   SELECT
 
     ?artist
 
     ?year
 
     (group_concat(DISTINCT ?release_name;separator=",") as ?releases)
 
     (COUNT(*) as ?releases_up_year)
 
   WHERE {
 
     VALUES ?year {
 
       1960 1961 1962 1963 1964 1965 1966 1967 1968 1969
 
       1970 1971 1972 1973 1974 1975 1976 1977 1978 1979
 
       1980 1981 1982 1983 1984 1985 1986 1987 1988 1989
 
       1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
 
       2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
 
       2010 2011 2012 2013 2014 2015 2016 2017 2018 
 
     }
 

 
 
     ?artist <http://musicbrainz.foo/name> "Elton John" .
 

 
 
     ?artist_credit_name <http://musicbrainz.foo/artist-credit> ?artist_credit .
 
     ?artist_credit_name <http://musicbrainz.foo/rdftype> <http://musicbrainz.foo/artist-credit-name> .
 
     ?artist_credit_name <http://musicbrainz.foo/artist> ?artist .
 
     ?artist_credit <http://musicbrainz.foo/rdftype> <http://musicbrainz.foo/artist-credit> .
 

 
 
     ?release_group <http://musicbrainz.foo/artist-credit> ?artist_credit .
 
     ?release_group <http://musicbrainz.foo/rdftype> <http://musicbrainz.foo/release-group> .
 
     ?release_group <http://musicbrainz.foo/name> ?release_group_name .
 
     ?release <http://musicbrainz.foo/release-group> ?release_group .
 
     ?release <http://musicbrainz.foo/name> ?release_name .
 
     ?release_country <http://musicbrainz.foo/release> ?release .
 
     ?release_country <http://musicbrainz.foo/date-year> ?release_country_year .
 

 
 
     FILTER (?release_country_year <= ?year)
 
   }
 
   GROUP BY ?artist ?year
 
 }
 
 # Releases in a year
 
 {
 
   SELECT ?artist ?year (COUNT(*) as ?releases_in_year)
 
   WHERE {
 
     VALUES ?year {
 
       1960 1961 1962 1963 1964 1965 1966 1967 1968 1969
 
       1970 1971 1972 1973 1974 1975 1976 1977 1978 1979
 
       1980 1981 1982 1983 1984 1985 1986 1987 1988 1989
 
       1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
 
       2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
 
       2010 2011 2012 2013 2014 2015 2016 2017 2018 
 
     }
 

 
 
     ?artist <http://musicbrainz.foo/name> "Elton John" .
 

 
 
     ?artist_credit_name <http://musicbrainz.foo/artist-credit> ?artist_credit .
 
     ?artist_credit_name <http://musicbrainz.foo/rdftype> <http://musicbrainz.foo/artist-credit-name> .
 
     ?artist_credit_name <http://musicbrainz.foo/artist> ?artist .
 
     ?artist_credit <http://musicbrainz.foo/rdftype> <http://musicbrainz.foo/artist-credit> .
 

 
 
     ?release_group <http://musicbrainz.foo/artist-credit> ?artist_credit .
 
     ?release_group <http://musicbrainz.foo/rdftype> <http://musicbrainz.foo/release-group> .
 
     ?release_group <http://musicbrainz.foo/name> ?release_group_name .
 
     ?release <http://musicbrainz.foo/release-group> ?release_group .
 
     ?release_country <http://musicbrainz.foo/release> ?release .
 
     ?release_country <http://musicbrainz.foo/date-year> ?release_country_year .
 

 
 
     FILTER (?release_country_year = ?year)
 
   }
 
   GROUP BY ?artist ?year
 
 }
 
 # Master data
 
 {
 
   SELECT DISTINCT ?artist ?artist_name ?artist_gender ?artist_begin_date ?artist_country_name
 
   WHERE {
 
     ?artist <http://musicbrainz.foo/name> ?artist_name .
 
     ?artist <http://musicbrainz.foo/name> "Elton John" .
 
     ?artist <http://musicbrainz.foo/gender> ?artist_gender_id .
 
     ?artist_gender_id <http://musicbrainz.foo/name> ?artist_gender .
 
     ?artist <http://musicbrainz.foo/area> ?birth_area .
 
     ?artist <http://musicbrainz.foo/begin-date-year> ?artist_begin_date.
 
     ?birth_area <http://musicbrainz.foo/name> ?artist_country_name .
 

 
 
     FILTER(datatype(?artist_begin_date) = xsd:int)
 
   }

استنتاج

• التحميل المجمع بسيط ولكنه بطيء. ولكن يمكن أن يكون الأمر معقدًا بسبب رسائل الخطأ التي لا تساعد كثيرًا
• دعم تحميل التدفق كل ما كنا نتوقعه ، وكان سريعًا بما يكفي
• الاستعلامات بسيطة ولكنها ليست تفاعلية بما يكفي لإجراء استعلامات تحليلية
• يجب تحسين استعلامات SPARQL يدويًا
• من الصعب تقييم مدفوعات أمازون لأنه من الصعب تقدير كمية البيانات الممسوحة ضوئيًا بواسطة استعلام SPARQL.