我正在尝试来自http://docs.openlinksw.com/virtuoso/rdfsparqlrule.html的以下示例。
将数据加载到图表中：
ttlp ('<http://localhost:8890/dataspace> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://rdfs.org/sioc/ns#Space> .
<http://localhost:8890/dataspace/test2/weblog/test2tWeblog> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://rdfs.org/sioc/types#Weblog> .
<http://localhost:8890/dataspace/discussion/oWiki-test1Wiki> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://rdfs.org/sioc/types#MessageBoard> .
<http://localhost:8890/dataspace> <http://rdfs.org/sioc/ns#link> <http://localhost:8890/ods> .
<http://localhost:8890/dataspace/test2/weblog/test2tWeblog> <http://rdfs.org/sioc/ns#link> <http://localhost:8890/dataspace/test2/weblog/test2tWeblog> .
<http://localhost:8890/dataspace/discussion/oWiki-test1Wiki> <http://rdfs.org/sioc/ns#link> <http://localhost:8890/dataspace/discussion/oWiki-test1Wiki> .
', '', 'http://localhost:8890/test');
关于子类和子属性的断言：
ttlp (' @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
<http://rdfs.org/sioc/ns#Space> rdfs:subClassOf <http://www.w3.org/2000/01/rdf-schema#Resource> .
<http://rdfs.org/sioc/ns#Container> rdfs:subClassOf <http://rdfs.org/sioc/ns#Space> .
<http://rdfs.org/sioc/ns#Forum> rdfs:subClassOf <http://rdfs.org/sioc/ns#Container> .
<http://rdfs.org/sioc/types#Weblog> rdfs:subClassOf <http://rdfs.org/sioc/ns#Forum> .
<http://rdfs.org/sioc/types#MessageBoard> rdfs:subClassOf <http://rdfs.org/sioc/ns#Forum> .
<http://rdfs.org/sioc/ns#link> rdfs:subPropertyOf <http://rdfs.org/sioc/ns> . ',
'', 'http://localhost:8890/schema/test');
定义规则：
rdfs_rule_set ('http://localhost:8890/schema/property_rules1', 'http://localhost:8890/schema/test');
执行查询：
define input:inference "http://localhost:8890/schema/property_rules1"
SELECT ?s FROM <http://localhost:8890/test>
WHERE {?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://rdfs.org/sioc/ns#Space> };
这给了我只有 1 个结果行 - http://localhost:8890/dataspace。
虽然我想得到 3 行：
http://localhost:8890/dataspace/test2/weblog/test2tWebloghttp://localhost:8890/dataspace/discussion/oWiki-test1Wikihttp://localhost:8890/dataspace
谁能告诉我我在这里做错了什么。是否需要授予 dba 对 rdfs_rule_set 的任何权限？非常感谢。