Procinura, P. aemula

Number of Pages: 4Integrative BiologyGeological Science

Xenosaurus platyceps

Number of Pages: 2Integrative BiologyGeological Science

Xenosaurus newmanorum

Number of Pages: 2Integrative BiologyGeological Science

Xenosaurus

Number of Pages: 3Integrative BiologyGeological Science

Xenosaurus grandis

Number of Pages: 4Integrative BiologyGeological Science

Query Answering in DL-Lite with Datatypes: A Non-Uniform Approach

Adding datatypes to ontology-mediated queries (OMQs) often makes query answering hard. As a consequence, the use of datatypes in OWL 2 QL has been severely restricted. In this paper we propose a new, non-uniform, way of analyzing the data-complexity of OMQ answering with datatypes. Instead of restricting the ontology language we aim at a classification of the patterns of datatype atoms in OMQs into those that can occur in non-tractable OMQs and those that only occur in tractable OMQs. To this end we establish a close link between OMQ answering with datatypes and constraint satisfaction problems over the datatypes. In a case study we apply this link to prove a P/coNP-dichotomy for OMQs over DL-Lite extended with the datatype (Q,<=). The proof employs a recent dichotomy result by Bodirsky and Kára for temporal constraint satisfaction problems

A checklist of the amphibians and reptiles of Sinaloa, Mexico with a conservation status summary and comparisons with neighboring states

Volume: 931Start Page: 85-11