Francois Bry and Sebastian Schaffert. The XML Query Language Xcerpt: Design Principles, Examples, and Semantics. In Web, Web-Services, and Database Systems, NODe 2002 Web and Database-Related Workshops, Erfurt, Germany , Lecture Notes in Computer Science, pages 295--310. Springer, 2002.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....b) the branch X b is removed, yielding a a. As a final step, all inequations that provide an upper bound for a variable are replaced with a binding of that variable to this upper bound (i.e. a X = a) 9. 3 Declarative Semantics Xcerpt s declarative semantics is described in [13]. It is defined in terms of a model theory a la Tarski, i.e. the declarative semantics of a compound expression is defined in terms of its components. 20 10 Perspectives In this article, the query and transformation language Xcerpt has been introduced on examples. Its design principles and its ....

Bry, F., Scha#ert, S.: The XML Query Language Xcerpt: Design Principles, Examples and Semantics. Technical report, Institut fur Informatik, LMU Munchen (2002)

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Francois Bry and Sebastian Scha#ert. The XML Query Language Xcerpt: Design Principles, Examples, and Semantics. In Akmal B. Chaudhri, et al. (Eds.), Lecture Notes in Computer Science (LNCS) on Web, Web-Services, and Database Systems, pages 295--310, 2002.

No context found.

Francois Bry and Sebastian Scha#ert. The XML Query Language Xcerpt: Design Principles, Examples, and Semantics. In Akmal B. Chaudhri, et al. (Eds.), Lecture Notes in Computer Science (LNCS) on Web, Web-Services, and Database Systems, pages 295--310, 2002.

....to querying semistructured data has first been presented in the language UnQL [4] However, UnQL rules may not be connected by chaining and 13 lack many of the constructs found in Xcerpt. Several publications concerning the language design and semantics of Xcerpt are available, in particular [5,15,12,16]. Visual XML query languages that the authors are aware of are XML GL [6] GraphLog [7] VXT [8] BBQ [9] and Xing [10] Most of these languages visualize the XML document as a tree (i.e. nodes connected with arrows or similar) While on first look this appears to be very concise, it does not ....

Bry, F., Scha#ert, S.: The XML Query Language Xcerpt: Design Principles, Examples, and Semantics. In: Proc. 2nd Int. Workshop "Web and Databases". LNCS 2593, Erfurt, Germany, Springer-Verlag (2002)

....processing capabilities if any. The W3C standard XML Schema [1, 2, 3] does have temporal data types but very limited temporal reasoning and no multi calendar reasoning. This paper reports on a project aiming at enriching a logic based query and transformation language for the Web, called Xcerpt [10, 11], with temporal constructs and temporal reasoning. To this aim, a temporal model is needed that (1) is simple enough for being understood by programmers with limited knowledge in logic and or temporal reasoning, 2) is structured in conceptual parts (e.g. layers) of various expressive power so as ....

....calendar systems and conversion between their concepts. 4 Perspectives The TemPTo model has been designed as a temporal type system of temporal types for the Web query and transformation language Xcerpt. This type system as well as its addition to Xcerpt are currently under development. Xcerpt [13, 11, 10, 12] is a logic based language currently developed and tested on Web based systems at the University of Munich. Because of its logic bias Xcerpt appears to be a very convenient host for temporal data types and temporal reasoning. Further investigations will show whether the temporal model TemPTo ....

Francois Bry and Sebastian Scha#ert. The XML Query Language Xcerpt: Design Principles, Examples, and Semantics. In Akmal B. Chaudhri, et al. (Eds.), Lecture Notes in Computer Science (LNCS) on Web, Web-Services, and Database Systems, pages 295--310, 2002.

....is described that is related to logic and Prolog. This language has (in the terminology used above) only label variables. In contrast, the basic query language introduced above also has term variables. The article [13] describes a non standard unification algorithm subjacent to Definition 9. [14,15] introduce in more detail the query language Xcerpt which builds upon the basic language constructs introduced above. Xcerpt has construct terms in which variables but no desc and may occur. A construct term with variables l i, l n is associated with a conjunction or disjunction of (possibly ....

Bry, F., Schaffert, S.: The XML Query Language Xcerpt: Design Principles, Examples, and Semantics. In: Proceedings of the 2nd Annual International Workshop "Web and Databases", Erfurt, Germany (2002) 14

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Francois Bry and Sebastian Schaffert. The XML Query Language Xcerpt: Design Principles, Examples, and Semantics. In Web, Web-Services, and Database Systems, NODe 2002 Web and Database-Related Workshops, Erfurt, Germany , Lecture Notes in Computer Science, pages 295--310. Springer, 2002.

No context found.

F. Bry and S. Scha#ert. The XML Query Language Xcerpt: Design Principles, Examples, and Semantics. In 2nd Annual International Workshop Web and Databases, volume 2593 of LNCS. Springer Verlag, 2002.

No context found.

F. Bry and S. Sebastian Scha#ert. The XML Query Language Xcerpt: Design Principles, Examples, and Semantics. Technical report, 2002. Available at: http://www.xcerpt.org.

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