Heel to toe to hair and hoof and it's head over heels and it's all but an ark-lark...

Jis E 1101 Pdf Here

JIS E 1101 refers to a standard defined by the Japanese Industrial Standards (JIS) for railway rolling stock, specifically for the "General requirements for railway rolling stock." This standard encompasses various aspects of design, manufacturing, testing, and maintenance for railway vehicles to ensure safety, performance, and interoperability.