### what different equation_order of FunctionField and order of a FunctionField?

http://sagemath.org/doc/reference/function_fields/sage/rings/function_field/function_field.html#sage.rings.function_field.function_field.FunctionField_polymod.equation_order

there are a function named equation_order(),what meaning about it?

I know order is a subring of maximal ring in a field,ther no equation_order define in all google.....