Explicitly representing the semantics of composite positional tolerance for patterns of holes

Yuchu Qin, Wenlong Lu, Qunfen Qi, Tukun Li, Meifa Huang, Paul Scott, Xiangqian Jiang

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


Representing the semantics of the interaction of two or more tolerances (i.e., composite tolerance) explicitly to make them computer-understandable is currently a challenging task in computer-aided tolerancing (CAT). We have proposed a description logic (DL) ontology-based approach to complete this task recently. In this paper, the representation of the semantics of the composite positional tolerance (CPT) for patterns of holes (POHs) is used as an example to illustrate the proposed approach. This representation mainly includes representing the structure knowledge of the CPT for POHs in DL terminological axioms; expressing the constraint knowledge with Horn rules; and describing the individual knowledge using DL assertional axioms. By implementing the representation with the web ontology language (OWL) and the semantic web rule language (SWRL), a CPT ontology is developed. This ontology has explicitly computer-understandable semantics due to the logic-based semantics of OWL and SWRL. As is illustrated by an engineering example, such semantics makes it possible to automatically check the consistency, reason out the new knowledge, and implement the semantic interoperability of CPT information. Benefiting from this, the ontology provides a semantic enrichment model for the CPT information extracted from CAD/CAM systems.

Original languageEnglish
Pages (from-to)2121-2137
Number of pages17
JournalInternational Journal of Advanced Manufacturing Technology
Issue number5-8
Early online date10 Oct 2016
Publication statusPublished - 1 May 2017


Dive into the research topics of 'Explicitly representing the semantics of composite positional tolerance for patterns of holes'. Together they form a unique fingerprint.

Cite this