IEC 61188-7:20 17(E)建立了描述电子元件方向及其焊盘图案几何形状的一致技术。这促进并鼓励了全球贸易伙伴之间的通用数据捕获和传输方法。 与上一版相比，此版本包括以下重大技术变更: a)图1已被修正； b)术语“矩形”通常被“多边形”取代 c)水平B已被指示为新文库的优选水平。

IEC 61188-7:2017(E) establishes a consistent technique for the description of electronic component orientation, and their land pattern geometries. This facilitates and encourages a common data capture and transfer methodology amongst and between global trading partners.
This edition includes the following significant technical changes with respect to the previous edition:
a)  Figure 1 has been corrected;
b)  the term “rectangle”has generally been replaced by “polygon”
c)  level B has been indicated as preferred level for new libraries.