> For the complete documentation index, see [llms.txt](https://roogame.gitbook.io/roogame/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://roogame.gitbook.io/roogame/ultimate-stats-framework/creating-your-attribute-system/stat-and-attribute-properties.md). # Stat and Attribute Properties This page explains the meaning and purpose of each property in the **Attribute** and **Stat** sections of the **Stat Designer**.
#### Min Value **Property:** `MinValue`\ **Type:** `Number` The lowest value allowed for this Attribute. For most resource Attributes, use `0`. ``` Health Min Value = 0 Mana Min Value = 0 Stamina Min Value = 0 ``` When an Attribute is modified below its minimum value, it is clamped to the minimum. ``` Health = 10 Damage = -25 Result: Health = 0 ``` #### Max Stat **Property:** `MaxStat`\ **Type:** `Roo Stat Data Asset` The Stat that provides this Attribute's maximum value. For example, the Health Attribute should usually use the HealthMax Stat. ``` Attribute: Health Max Stat: HealthMax ``` ``` HealthMax = 100 Health = 75 / 100 ``` If `HealthMax` changes because of equipment, level progression, or modifiers, the maximum value of Health also changes. ``` HealthMax changes from 100 to 150 Health changes from 75 / 100 to 75 / 150 ``` The current Attribute value is clamped if it becomes higher than the new maximum value. #### Start Percent **Property:** `StartPercent`\ **Type:** `Number` The percentage of the maximum value used when the Attribute is initialized. ``` StartPercent = 1.0 ``` The Attribute starts at its maximum value. ``` HealthMax = 100 Health starts at 100 / 100 ``` ``` StartPercent = 0.5 ``` The Attribute starts at half of its maximum value. ``` HealthMax = 100 Health starts at 50 / 100 ``` ``` StartPercent = 0.25 ``` The Attribute starts at 25% of its maximum value. ``` HealthMax = 100 Health starts at 25 / 100 ``` Use `1.0` for most player resources, such as Health, Mana, and Stamina. *** #### Base Value **Property:** `BaseValue`\ **Type:** `Number` The default value of the Stat before modifiers and formulas are applied. ``` Attack Base Value = 10 HealthMax Base Value = 100 MoveSpeed Base Value = 600 ``` For a simple Stat without a Formula, the Base Value is its normal starting value. #### Formula **Property:** `Formula`\ **Type:** `Roo Stat Formula Data Asset` An optional Formula used to calculate the final Stat value. When a Formula is assigned, the final value is calculated from the Formula instead of using only the Base Value. ``` HealthMax Formula: 100 + self.stat.Vitality * 20 ``` Example result: ``` Vitality = 5 HealthMax = 100 + 5 * 20 HealthMax = 200 ``` Leave this property empty when the Stat does not need a calculated value.