Towards supporting multiple semantics of named graphs using N3 rules

Semantic Web applications often require the partitioning of triples into subgraphs, and then associating them with useful metadata (e.g., provenance). This led to the introduction of RDF datasets, with each RDF dataset comprising a default graph and zero or more named graphs. However, due to differences in RDF implementations, no consensus could be reached on a standard semantics; and a range of different dataset semantics are currently assumed. For an RDF system not be limited to only a subset of online RDF datasets, the system would need to be extended to support different dataset semantics—exactly the problem that eluded consensus before. In this paper, we transpose this problem to Notation3 Logic, an RDF-based rule language that similarly allows citing graphs within RDF documents. We propose a solution where an N3 author can directly indicate the intended semantics of a cited graph— possibly, combining multiple semantics within a single document. We supply an initial set of companion N3 rules, which implement a number of RDF dataset semantics, which allow an N3-compliant system to easily support multiple different semantics

Foreword

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Foreword

When in 1855 Lehre und Wehre, the chief ancestor of the Concordia Theological Monthly, made its appearance, it could be compared to a vigorous youth who with his right hand held a loft the Bible and with his left the Confessions of the Lutheran Church. From the very beginning it was apparent to all readers that the editors conceived of their task as consisting in promulgating and defending, with all the theological apparatus and equipment available, God\u27s Word and Luther\u27s doctrine pure.\u27\u27 Month after month scholarly articles, pointed paragraphs on current religious happenings, and informing book reviews come before the public on its pages, and all testified that here there was a journal which meant in every respect to abide by the teachings of the Holy Scriptures and of the Lutheran Confessions collected in the Book of Concord of 1580. While undoubtedly on some points touching the nature and the policy of the new journal contemporary opinion was divided, it is difficult to see, as one pages through the early volumes, how there can have been any dissension on the position this journal meant to take and to maintain with respect to the Bible and the Lutheran Confessions