Filtering results of SPARQL queries -

-

i want retrieve 20th century italian novelists' name. i've written this:

select ?label where{ ?novelist yago:italiannovelists. ?novelist rdfs:label ?label. filter (langmatches(lang(?label), "en")) } order ?label

how can filter results?

there several options. here i'd suggest two:

  1. use pattern ?novelist dct:subject dbc:20th-century_novelists, if can rely on classification.

    select ?label where{ ?novelist yago:italiannovelists; rdfs:label ?label; dct:subject dbc:20th-century_novelists. filter (langmatches(lang(?label), "en")) }
    order ?label

  2. define birth range or life-span range. example birth range:

    select ?label where{ ?novelist yago:italiannovelists; rdfs:label ?label; dbo:birthdate ?date.
    bind (year(?date) ?year) filter (langmatches(lang(?label), "en")) filter (?year > 1882 && ?year < 1972) } order ?label

with option 2 more results depending on range, might include novelists haven't published in 20th century.

a third option filter year of publishing. however, wouldn't recommend it. first, give results whom such information available in dbpedia, , subset smaller 1 first option. second, depending on how define 20 century novelist, query results omit wrote novel in 20 century, published in 21.


Comments

Post a Comment

Popular posts from this blog

ios - RestKit 0.20 — CoreData: error: Failed to call designated initializer on NSManagedObject class (again) -

-
this error has shown on many times, seems. prominent answer issue seems restkit 0.20 — coredata: error: failed call designated initializer on nsmanagedobject class however, solution posted doesn't work me. let's start beginning: i want upload file server. want parse response make sure uploaded. if not, try again later. model has boolean variable called nsnumber *senttoserver purpose (in coredata, bool saved nsnumber ) . because don't know whether sending going successful, save entity coredata model first before sending via restkit. when post request successful, server returns json string this: {"id":14,"created":true} notice that, of course, id not set on coredata model yet, both id , created new informations model. here's model: @interface recording : nsmanagedobject @property (nonatomic, retain) nsstring * audiofilepath; @property (nonatomic, retain) nsdate * createdat; @property (nonatomic, retain) nsstring * deviceid; @
Read more

laravel - PDOException in Connector.php line 55: SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: YES) -

-
my .env: app_env=local app_debug=true app_key=myappkey app_url=http://localhost db_connection=mysql db_host=localhost db_port=3306 db_database=gestiontaller db_username=root db_password='root' cache_driver=file session_driver=file queue_driver=sync redis_host=127.0.0.1 redis_password=null redis_port=6379 mail_driver=smtp mail_host=mailtrap.io mail_port=2525 mail_username=null mail_password=null mail_encryption=null i've tried password ", ' , without, restarting server every time. i've tried changing localhost 172.0.0.1. yes, password correct, running mysql -u root -p introducing password root in prompt can go mysql. users table: +------------------+-----------+ | user | host | +------------------+-----------+ | debian-sys-maint | localhost | | mysql.sys | localhost | | root | localhost | | root1 | localhost | +------------------+-----------+ i've added homestead.yaml this: database_port: 3306
Read more

java - Digest auth with Spring Security using javaconfig -

-
so i'm trying create digest authentication spring following documentation trying translate xml "requirements" in java requirements. let's have xml in docs: <bean id="digestfilter" class= "org.springframework.security.web.authentication.www.digestauthenticationfilter"> <property name="userdetailsservice" ref="jdbcdaoimpl"/> <property name="authenticationentrypoint" ref="digestentrypoint"/> <property name="usercache" ref="usercache"/> </bean> <bean id="digestentrypoint" class= "org.springframework.security.web.authentication.www.digestauthenticationentrypoint"> <property name="realmname" value="contacts realm via digest authentication"/> <property name="key" value="acegi"/> <property name="noncevalidityseconds" value="10"/> </b
Read more