The tractability of the lightweight description logic EL has allowed for the
construction of large and widely used ontologies that support semantic
interoperability. However, comprehensive domains with a broad user base are
often at odds with strong axiomatisations otherwise useful for inferencing,
since these are usually context-dependent and subject to diverging
perspectives. In this paper we introduce Standpoint EL, a multi-modal extension
of EL that allows for the integrated representation of domain knowledge
relative to diverse, possibly conflicting standpoints (or contexts), which can
be hierarchically organised and put in relation to each other. We establish
that Standpoint EL still exhibits EL's favourable PTime standard reasoning,
whereas introducing additional features like empty standpoints, rigid roles,
and nominals makes standard reasoning tasks intractable.

介绍了一种名为 Standpoint EL 的多模态扩展版本，它允许相对于不同且可能相冲突的观点（或上下文）集成表示领域知识，具有轻量级描述逻辑的可解性，同时引入一些额外的功能使得标准的推理任务变得不可行。