An identification attribute (in the form of a set of names) associated with a graphical output primitive in standards such as GKS-94 and PHIGS. The attribute is used to filter or select groups of primitives for manipulation or display.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。