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Normal Forms And Conservative Extension Properties For Query Languages Over Collection Types (1995) [15 citations — 7 self] ... 109 Naturally embedded query languages – Breazu-Tannen, Buneman, et al. - 1992...
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citeseerx.ist.psu.edu/viewdoc/summary;jsessionid=76BECA...
citeseerx.ist.psu.edu/viewdoc/summary;jsessionid=76BECAF65C262EC905BFD3D5F56438D6?doi=10.1.1.41.1604
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Our proof holds regardless of whether the language is used for querying sets, bags, or lists, even in the presence of variant types. Moreover, the normal forms are useful in a general approach to query optimization.
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www.cis.upenn.edu/~db/abstracts/pods93a.html
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Many document query languages have been proposed for specifying document retrieval. But the formalisms for document query languages are still underdeveloped. An adequate formalism is critical for query ... UML (Unified Modeling Language) models can be used to define XML document types instead of DTDs or schemas.
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www.gca.org/attend/2000_conferences/Extreme_2000/wednes...
www.gca.org/attend/2000_conferences/Extreme_2000/wednesday.htm
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Over the years DBPL has established itself as the main venue for publishing and discussing new ideas at the intersection of database and programming languages research. ... Many key contributions in query languages for object-oriented data, persistent databases, nested relational data, semistructured data,
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krono.act.uji.es/noticias/cfp-dbpl-2007
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Usually subtyping relations are defined either syntactically by a formal system or semantically by an interpretation of types in an untyped denotational model. In this work we show how to define a subtyping relation semantically, for a language ... Tree extension algebras: Logics, automata, and query languages;
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floc02.diku.dk/LICS/Tuesday.html
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QL '98 - W3C Query Languages Workshop ... DTDs and XML Schema can be thought of as providing something like types for XML. The XML Query algebra uses a simple type system that captures the essence of XML Schema Structures. The type system is close to that used in XDuce.
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xml.coverpages.org/xmlQuery.html
xml.coverpages.org/xmlQuery.html
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Abstract: This paper identifies essential features of an XML query language by examining four existing query languages: XML-QL, YATL, Lorel, and XQL. The first three languages come from ... Using tag variables, we can generalize the Join query from Section 2.6 over all item types by joining element tags and element values.
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www.w3.org/1999/09/ql/docs/xquery.html
www.w3.org/1999/09/ql/docs/xquery.html
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A query language that uses the structure of XML intelligently can express queries across all these kinds of data, whether physically stored in XML or viewed as XML via middleware. This specification describes a query language called XQuery, which is designed to be broadly applicable across many types of XML data sources.
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www.w3.org/TR/xquery/
www.w3.org/TR/xquery/
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