标准延迟格式（SDF）是一种现有的OVI标准，用于表示和解释在电子设计过程的任何阶段使用的计时数据。SDF le中的ASCII数据以独立于工具和语言的方式表示，包括路径延迟、定时约束值、连接间延迟和高级技术参数。本标准以双标识IEC-IEEE发布。 标准

The Standard Delay Format (SDF)is an existing OVI standard for the representation and interpretation of timing data for use at any stage of the electronic design process.The ASCII data in the SDF le is represented in a tool and language independent way and includes path delays,timing constraint values,inter-connect delays and high level technology parameters. This standard is published with a double logo IEC-IEEE. standard.