Federating queries in SPARQL 1.1: syntax, semantics and evaluation

Given the sustained growth that we are experiencing in the number of SPARQL endpoints available, the need to be able to send federated SPARQL queries across these has also grown. To address this use case, the W3C SPARQL working group is defining a federation extension for SPARQL 1.1 which allows for combining graph patterns that can be evaluated over several endpoints within a single query. In this paper, we describe the syntax of that extension and formalize its semantics. Additionally, we describe how a query evaluation system can be implemented for that federation extension, describing some static optimization techniques and reusing a query engine used for data-intensive science, so as to deal with large amounts of intermediate and final results. Finally we carry out a series of experiments that show that our optimizations speed up the federated query evaluation process.

Syntax processing by auditory cortical neurons in the FM–FM area of the mustached bat Pteronotus parnellii

Syntax denotes a rule system that allows one to predict the sequencing of communication signals. Despite its significance for both human speech processing and animal acoustic communication, the representation of syntactic structure in the mammalian brain has not been studied electrophysiologically at the single-unit level. In the search for a neuronal correlate for syntax, we used playback of natural and temporally destructured complex species-specific communication calls—so-called composites—while recording extracellularly from neurons in a physiologically well defined area (the FM–FM area) of the mustached bat’s auditory cortex. Even though this area is known to be involved in the processing of target distance information for echolocation, we found that units in the FM–FM area were highly responsive to composites. The finding that neuronal responses were strongly affected by manipulation in the time domain of the natural composite structure lends support to the hypothesis that syntax processing in mammals occurs at least at the level of the nonprimary auditory cortex.

From constituents to syntax-oriented dependencies

This paper describes the automatic process of building a dependency annotated corpus based on Ancora constituent structures. The Ancora corpus already has a dependency structure information layer, but the new annotated data applies a purely syntactic orientation and offers in this way a new resource to the linguistic research community. The paper details the process of reannotating the corpus, the linguistic criteria used and the obtained results.

The syntax and idioms of Hindustani : or, progressive exercises in translation, with notes and directions and vocabularies.

Mode of access: Internet.

An interactive syntax analyzer,

Bibliography: p. 33.

An extended syntax-directed translation scheme /

Bibliography: p. 36.

Control statement syntax and semantics of a language for parallel processors,

"Supported in part by the Advanced Research Projects Agency ... under Contract no. US AF 30(602) 4144."

Syntax-directed error recovery for compilers /

Photocopy. Ann Arbor, Mich. : Xerox University Microfilms, 1976. -- 21 cm.

Twinkle : a syntax language for a translator writing system.

Mode of access: Internet.

A BNF like language for the description of syntax directed compilers.

"Supported in part by the Advanced Research Projects Agency ... under Contract no. US AF 30(602) 4144."

A generator/grader of problems about syntax of programming languages to be used in an automated exam system /

Thesis (M.S.)--University of Illinois at Urbana-Champaign.

The syntax of Castilian prose /

Includes bibliographical references.

Der infinitiv bei Lucretius. Ein beitrag zur ergänzung von Drägers hist. syntax,

Caption title.

Lateinische Syntax des Verbums. Ein wissenschaftlich-didaktischer Versuch.

"Abkürzungen der Titel der besonders häufig zitierten Werke und Abhandlungen.": p. [xi]-xii.

Die Lehre der Nebensätze im Cliges von Chrestien de Troyes. Ein Beitrag zur historischen Syntax des Altfranzösischen.

Mode of access: Internet.