Querying linked building data using SPARQL with functional extensions

In this paper, we propose to extend SPARQL functions for querying building models. Building models captured by the IFC data model are the target data sources to develop extended functions. By extending these functions, we aim to 1) simplify writing queries and 2) retrieve useful information implied in building models. These functions are classified into four categories according to required data inputs. A prototype implementation is provided with indicate performance testing. Since this system is compatible with SPARQL and Linked Data environment, building models can be queried with data from other fields. A case study is conducted to query building and regulatory data for code compliance checking purpose. It demonstrates an approach which can be applied and extended for many other use cases.