In order to describe the complexity of aircraft and make the digital product definition ( dpd ) model hereditable and patulous , a product - process - resource ( ppr ) knowledge model for aircraft is presented 摘要为描述飞机产品的复杂性，使数字化产品定义模型具有良好的可继承性和可扩展性，提出了飞机产品过程资源知识模型。
2.
The ppr knowledge model is applied in dpd of an aircraft ' s wing , and its application shows that with patulous hereditable , this model can provide single data - source for product development during product life cycle 应用结果表明，该模型能够为产品开发的整个生命周期提供单一的数据源，并具有良好的知识可扩展性和可继承性。
