Academic Journal
XQBE (XQuery By Example): A Visual Interface to the Standard XML Query Language.
| Title: | XQBE (XQuery By Example): A Visual Interface to the Standard XML Query Language. |
|---|---|
| Authors: | Braga, Daniele, Campi, Alessandro, Ceri, Stefano |
| Source: | ACM Transactions on Database Systems; Jun2005, Vol. 30 Issue 2, p398-443, 46p |
| Subject Terms: | XML (Extensible Markup Language), Query languages (Computer science), Relational databases, Database management, Information storage & retrieval systems, PL/SQL (Computer program language) |
| Abstract: | The spreading of XML data in many contexts of modern computing infrastructures and systems causes a pressing need for adequate XML querying capabilities; to address this need, the W3C is proposing XQuery as the standard query language for XML, with a language paradigm and a syntactic flavor comparable to the SQL relational language. XQuery is designed for meeting the requirements of skilled database programmers; its inherent complexity makes the new language unsuited to unskilled users. In this article we present XQBE (XQuery By Example), a visual query language for expressing a large subset of XQuery in a visual form. In designing XQBE, we targeted both unskilled users and expert users wishing to speed up the construction of their queries; we have been inspired by QBE, a relational language initially proposed as an alternative to SQL, which is supported by Microsoft Access. QBE is extremely successful among users who are not computer professionals and do not understand the subtleties of query languages, as well as among professionals who can draft their queries very quickly. According to the hierarchical nature of XML, XQBE's main graphical elements are trees. One or more trees denote the documents assumed as query input, and one tree denotes the document produced by the query. Similar to QBE, trees are annotated so as to express selection predicates, joins, and the passing of information from the input trees to the output tree. This article formally defines the syntax and semantics of XQBE, provides a large set of examples, and presents a prototype implementation. [ABSTRACT FROM AUTHOR] |
| Copyright of ACM Transactions on Database Systems is the property of Association for Computing Machinery and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Complementary Index |
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| Items | – Name: Title Label: Title Group: Ti Data: XQBE (XQuery By Example): A Visual Interface to the Standard XML Query Language. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Braga%2C+Daniele%22">Braga, Daniele</searchLink><br /><searchLink fieldCode="AR" term="%22Campi%2C+Alessandro%22">Campi, Alessandro</searchLink><br /><searchLink fieldCode="AR" term="%22Ceri%2C+Stefano%22">Ceri, Stefano</searchLink> – Name: TitleSource Label: Source Group: Src Data: ACM Transactions on Database Systems; Jun2005, Vol. 30 Issue 2, p398-443, 46p – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22XML+%28Extensible+Markup+Language%29%22">XML (Extensible Markup Language)</searchLink><br /><searchLink fieldCode="DE" term="%22Query+languages+%28Computer+science%29%22">Query languages (Computer science)</searchLink><br /><searchLink fieldCode="DE" term="%22Relational+databases%22">Relational databases</searchLink><br /><searchLink fieldCode="DE" term="%22Database+management%22">Database management</searchLink><br /><searchLink fieldCode="DE" term="%22Information+storage+%26+retrieval+systems%22">Information storage & retrieval systems</searchLink><br /><searchLink fieldCode="DE" term="%22PL%2FSQL+%28Computer+program+language%29%22">PL/SQL (Computer program language)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The spreading of XML data in many contexts of modern computing infrastructures and systems causes a pressing need for adequate XML querying capabilities; to address this need, the W3C is proposing XQuery as the standard query language for XML, with a language paradigm and a syntactic flavor comparable to the SQL relational language. XQuery is designed for meeting the requirements of skilled database programmers; its inherent complexity makes the new language unsuited to unskilled users. In this article we present XQBE (XQuery By Example), a visual query language for expressing a large subset of XQuery in a visual form. In designing XQBE, we targeted both unskilled users and expert users wishing to speed up the construction of their queries; we have been inspired by QBE, a relational language initially proposed as an alternative to SQL, which is supported by Microsoft Access. QBE is extremely successful among users who are not computer professionals and do not understand the subtleties of query languages, as well as among professionals who can draft their queries very quickly. According to the hierarchical nature of XML, XQBE's main graphical elements are trees. One or more trees denote the documents assumed as query input, and one tree denotes the document produced by the query. Similar to QBE, trees are annotated so as to express selection predicates, joins, and the passing of information from the input trees to the output tree. This article formally defines the syntax and semantics of XQBE, provides a large set of examples, and presents a prototype implementation. [ABSTRACT FROM AUTHOR] – Name: Abstract Label: Group: Ab Data: <i>Copyright of ACM Transactions on Database Systems is the property of Association for Computing Machinery and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 46 StartPage: 398 Subjects: – SubjectFull: XML (Extensible Markup Language) Type: general – SubjectFull: Query languages (Computer science) Type: general – SubjectFull: Relational databases Type: general – SubjectFull: Database management Type: general – SubjectFull: Information storage & retrieval systems Type: general – SubjectFull: PL/SQL (Computer program language) Type: general Titles: – TitleFull: XQBE (XQuery By Example): A Visual Interface to the Standard XML Query Language. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Braga, Daniele – PersonEntity: Name: NameFull: Campi, Alessandro – PersonEntity: Name: NameFull: Ceri, Stefano IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2005 Type: published Y: 2005 Identifiers: – Type: issn-print Value: 03625915 Numbering: – Type: volume Value: 30 – Type: issue Value: 2 Titles: – TitleFull: ACM Transactions on Database Systems Type: main |
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