Hi Amy,
The original terminology is:
Everyone in one line: Major Set
The number of people in each subset: Minor Set
Duple Minor: Each Minor Set is made of two couples, i.e. four dancers
Triple Minor: Each Minor Set is made of three couples, i.e. six dancers
Duple is shorthand for the four people in a Duple Minor Set.
In the 18th century the Triple Minor was the standard. In the 20th and 21st centuries the Duple Minor is the standard.
Happy dancing,
John
John Sweeney, Dancer, England john@modernjive.com 01233 625 362 & 07802 940 574
http://www.contrafusion.co.uk for Dancing in Kent