This paper presents an indoor navigation support system based on the Building Information Models (BIM) paradigm. Although BIM is initially defined for the Architecture, Engineering and Construction/Facility Management (AEC/FM) industry, the authors believe that it can provide added value in this context. To this end, the authors will focus on the Industry Foundation Classes (IFC) standard for the formal representation of BIM. The approach followed in this paper will be based on the ifcOWL ontology, which translates the IFC schemas into Ontology Web Language (OWL). Several modifications of this ontology have been proposed, consisting of the inclusion of new items, SWRL rules and SQWRL searches. This way of expressing the elements of a building can be used to code information that is very useful for navigation, such as the location of elements related to the actions desired by the user. It is important to note that this design is intended to be used as a complement to other well-known tools and techniques for indoor navigation. The proposed modifications have been successfully tested in a variety of simulated and real scenarios. The main limitation of the proposal is the immense amount of information contained in the ifcOWL ontology, which causes difficulties involving its processing and the time necessary to perform operations on it. Those elements that are considered important have been selected, removing those that seem secondary to navigation. This procedure will result in a significant reduction in the storage and semantic processing of the information. Thus, for a system with 1000 individuals (in the ontological sense), the processing time is about 90 s. The authors regard this time as acceptable, since in most cases the tasks involved can be considered part of the system initialization, meaning they will only be executed once at the beginning of the process.

本文提出了一种基于建筑物信息模型（BIM）范式的室内导航支持系统。尽管BIM最初是为建筑，工程和建设/设施管理（AEC / FM）行业定义的，但作者认为BIM可以在这种情况下提供附加值。为此，作者将专注于BIM正式表示形式的行业基础类（IFC）标准。本文采用的方法将基于ifcOWL本体，该本体将IFC模式转换为本体Web语言（OWL）。已经提出了对该本体的一些修改，包括新项目的添加，SWRL规则和SQWRL搜索。这种表达建筑物元素的方式可用于编码对于导航非常有用的信息，例如与用户所需动作相关的元素的位置。重要的是要注意，此设计旨在用作室内导航其他知名工具和技术的补充。所提出的修改已在各种模拟和真实场景中成功进行了测试。该提案的主要局限性在于ifcOWL本体中包含的大量信息，这导致涉及其处理以及对其执行操作所需的时间的困难。已选择了那些被认为重要的元素，从而删除了那些似乎仅次于导航的元素。此过程将大大减少信息的存储和语义处理。因此，对于具有1000个个体的系统（在本体论意义上），处理时间约为90 s。作者认为这段时间是可以接受的，因为在大多数情况下，可以将所涉及的任务视为系统初始化的一部分，这意味着它们仅在过程开始时执行一次。