dataset 查詢構(gòu)造 設(shè)計方案

1、Dataset 查詢構(gòu)建設(shè)計方案,劉慶霞Websoft Group @ NJU,2024/3/17,查詢構(gòu)建,提供一種交互方式，讓用戶在逐步探索中了解數(shù)據(jù)的schema在瀏覽過程中構(gòu)建查詢得到相應(yīng)的實例層查詢結(jié)果,2,初步調(diào)研,T. Catarci, T. D. Mascio, E. Franconi, G. Santucci, and S. Tessaris. An ontology based visual tool f

2、or query formulation support. In Proc. of ECAI 2004. Nikolaos Athanasis, Vassilis Christophides, Dimitris Kotzinos: Generating On the Fly Queries for the Semantic Web: The ICS-FORTH Graphical RQL Interface (GRQL). Inte

3、rnational Semantic Web Conference 2004: 486-501.Russell, A., Smart, R., Braines, D., and Shadbolt, R.: NITELIGHT: A Graphical Tool for Semantic Query Construction. In Proceedings of the Semantic Web User Interaction Wo

4、rkshop (SWUI). 2008.,3,初步調(diào)研An ontology based visual tool for query formulation support,4,特點tree structured querysubstitution by navigationrefinement by compatible termsproperty extension （to create a new br

5、anch)define sub-query,特點以class為節(jié)點保留訪問路徑可將瀏覽過程轉(zhuǎn)換為RQL查詢,初步調(diào)研Generating On the Fly Queries for the Semantic Web: The ICS-FORTH Graphical RQL Interface (GRQL),5,特點基于SPARQL圖形化構(gòu)造查詢可表達Optional、Union、Variable filter可將瀏覽過

6、程轉(zhuǎn)換為RQL查詢,初步調(diào)研 NITELIGHT: A Graphical Tool for Semantic Query Construction,6,特點基于SPARQL圖形化構(gòu)造查詢可表達Optional、Union、Variable filterontology browser,初步調(diào)研 NITELIGHT: A Graphical Tool for Semantic Query Construction,7,Data

7、set查詢構(gòu)建框架,8,,,,query displayed as a treerestrictnew a child node(a new variable)renamedelete,restrictions of current node types relations with ancestors,variable list,result table,示例,select person who is a scientis

8、t and works in an university located in his/her birthplace,9,select ?personwhere ? person rdf:type Scientist . ? person hasAffiliation ?x . ? person birthplace ?y .

9、 ?x rdf:type University . ?x location ?y .,示例,10,,,,Create query,Restrictions,Results,示例,11,,,,Restrictions,Results,示例,12,,,,Restrictions,Results,示例,13,,,,Query Tree,Add Restrictions,?pers

10、on,?person (?person, rdf:type, Person),示例,14,,,,Query Tree,Add Restrictions,?person,?person (?person, rdf:type, Person),?person,renamedeletenew variable,示例,15,,,,Query Tree,Add Restrictions,?person,?person,?person,示例,1

11、6,,,,Query Tree,Add Restrictions,?person,?person (?person, rdf:type, Person),?person,示例,17,,,,Query Tree,Add Restrictions,,?x,,,,(?person, has affiliation, ?x),示例,18,,,,Query Tree,Add Restrictions,,?x,(?person, has affi

12、liation, ?x),,,,示例,19,,,,Query Tree,Add Restrictions,,?x,(?person, has affiliation, ?x),,,,renamedeletenew variable,示例,20,,,,Query Tree,Add Restrictions,,?x,(?person, has affiliation, ?x),,,,示例,21,示例,22,,,,Query Tre

13、e,Add Restrictions,,?y,(?x, location, ?y),relations: ?person √ birthplace ?y deathplace ?y,,,,,,特點,查詢含義： triple pattern的集合構(gòu)成元素： class、property、variable（涉及實例層數(shù)據(jù)的查詢在未來“查詢過濾”中解決）變量關(guān)聯(lián)樹節(jié)點——