Everybody knows that to create a device set you must have at least one variant of the device that binds the symbol to the package. The default variant is called ''. That is right. Double single quotes. It represents an empty string.
You may have also noticed that if you name a variant, the name is appended to the device name. For example, if you have a device named
and a variant
the resulting name will appear as
Pretty cool, huh? Often manufacturers will have a package code embedded in the device part number. For example, if
is the base part number, and the manufacturer has package codes