A graphical environment to query XML data with XQuery

2005

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.

World Wide Web, 2005

2003

Abstract As the use of XML is rapidly growing, a growing number of users without programming skills will need to query XML data. Although designed to be easily understood by humans, XQuery, the XML standard query language, has the typical syntax of programming languages, which most users dislike. In this paper we describe a graphical language (XQBE) inspired by" Query By Example"(QBE), a popular relational query language used by MS Access.

2004

XQuery is increasingly popular among computer scientists with a SQL background, since queries in XQuery and SQL require comparable skills to be formulated. However, the number of these experts is limited, and the availability of easier XQuery “dialects” could be extremely valuable. Something similar happened with QBE, initially proposed as an alternative to SQL, that has then become popular as the user-friendly query language supported by MS Access.

2003

2000

In this paper, we describe the characteristics of two different query languages designed to query XML data: DSQL, a declarative SQL like language and XQuery, a procedural language that is fast becoming the defacto language for XML querying. We then describe the design of an experiment aimed at comparing the accuracy and efficiency of the query formulation process when using

1999

As more and more information is either stored in XML, exchanged in XML, or presented as XML through various interfaces, the ability to intelligently query our XML data sources becomes increasingly important. XML documents are structured documents – they blur the distinction between data and documents, allowing documents to be treated as data sources, and traditional data sources to be treated as documents. XQL is a query language designed specifically for XML. In the same sense that SQL is a query language for for relational tables and OQL is a query language for objects stored in an object database, XQL is a query language for XML documents. The basic constructs of XQL correspond directly to the basic structures of XML, and XQL is closely related to XPath, the common locator syntax used by XSL and XPointers. Since queries, transformation patterns, and links are all based on patterns in structures found in possible XML documents, a common model for the pattern language used in these...

Large Scale Semantic …, 2007

In this paper, we propose a solution of XML graphical querying based on the XQuery language. Our proposal integrates textual, spatial and temporal metadata in order to improve information retrieve and present document suitable to th eu ser's needs. We, also, p ...

Computer Networks, 1999