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DBPL
2005
Springer

On the Expressive Power of XQuery Fragments

14 years 2 months ago
On the Expressive Power of XQuery Fragments
XQuery is known to be a powerful XML query language with many bells and whistles. For many common queries we do not need all the expressive power of XQuery. We investigate the effect of omitting certain features of XQuery on the expressive power of the language. We start from a simple base fragment which can be extended by several optional features being aggregation functions such as count and sum, sequence generation, node construction, position information in for loops, and recursion. In this way we obtain 64 different XQuery fragments which can be divided into 17 different equivalence classes such that two fragments can express the same functions iff they are in the same equivalence class. Moreover, we investigate the relationships between these equivalence classes.
Jan Hidders, Stefania Marrara, Jan Paredaens, Roel
Added 13 Oct 2010
Updated 13 Oct 2010
Type Conference
Year 2005
Where DBPL
Authors Jan Hidders, Stefania Marrara, Jan Paredaens, Roel Vercammen
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