Attribute Modifier Operation (Data Type)

A String that picks the operation of an Attribute Modifier.

Vanilla and Apoli names

The three vanilla operation names, in both their 1.20 and 1.21 spellings, and the longer Apoli names are interchangeable. Use whichever reads better in your pack.

Vanilla 1.20 / Apace	Vanilla 1.21	Apoli name
addition	add_value	add_base_early
multiply_base	add_multiplied_base	multiply_base_additive
multiply_total	add_multiplied_total	multiply_total_multiplicative

The 1.21 names are also accepted in upper case (ADD_VALUE, ADD_MULTIPLIED_BASE, ADD_MULTIPLIED_TOTAL), since some packs write them that way.

Values

Value	Description
add_base_early (aliases addition and add_value)	NewBase = Base + Modifier, early in the base phase.
multiply_base_additive (aliases multiply_base and add_multiplied_base)	NewBase = Base + (Base * Modifier).
multiply_base_multiplicative	NewBase = Base * (1 + Modifier).
standard_multiply_base	NewBase = Base * Modifier.
standard_divide_base	NewBase = Base / Modifier.
add_base_late	NewBase = Base + Modifier, late in the base phase.
min_base	NewBase = max(Base, Modifier), which raises the floor.
max_base	NewBase = min(Base, Modifier), which caps the ceiling.
set_base	NewBase = Modifier.
add_total_early	NewTotal = Total + Modifier, early in the total phase.
multiply_total_additive	NewTotal = Total + (Total * Modifier).
multiply_total_multiplicative (aliases multiply_total and add_multiplied_total)	NewTotal = Total * (1 + Modifier).
standard_multiply_total	NewTotal = Total * Modifier.
standard_divide_total	NewTotal = Total / Modifier.
min_total	NewTotal = max(Total, Modifier).
max_total	NewTotal = min(Total, Modifier).
set_total	NewTotal = Modifier, which overrides everything before it.
add_total_late	NewTotal = Total + Modifier, after everything else, set_total included.

Phases and ordering

Modifiers run in two phases, base first and then total. Within a phase they follow the order of the table above, top first. When two modifiers share a phase and an operation, the order between them isn't defined, so don't rely on it.

For resource operations (apoli:modify_resource and its apoli:change_resource alias), the resource value is both Base and Total, so the operations come down to a change of a single number.