0 = a simple item (can only select an icon/model pair);
1 = a colored item, e.g. cloaks and helms (can additionally select colors);
2 = a configurable item, e.g. weapons (select three item parts instead of an overall model);
3 = armor.

Indicates which animation set is used when this item is wielded (equipped) in one of the weapon slots. May also affect which slots it can work in (eg; double sided weapons take both slots)

1 = Piercing

2 = Bludgeoning

3 = Slashing

4 = Slashing and Piercing

5 = Piercing and Bludgeoning

1 - tiny

2 - small

3 - medium

4 - large

5 - huge

The size of the weapon item. These numbers correspond to the rows in creaturesize.2da - and is relative to them (eg; what weapons are considered "2 handed" for Small creatures like Halflings for instance, and which weapons are too large or small for certain sized creatures to wield).

Note while the Bioware documentation suggests just 1- 5 (with 5 not being used by the game by default) there's no reason to suggest it couldn't go a bit higher (although no lower).

Should be blank **** for non-weapons.

Index to the row in Baseitems.2da specifying the type of ammunition used by a ranged weapon. Projectile weapons point to either row 20, 25, or 27. Thrown weapons point to themselves (i.e. they are their own ammunition) but the exact number does not make a difference as long as it is positive.

Note: it does not appear to be possible to create a new ranged weapon, although it is possible to replace an existing one with a new ranged weapon.

**** if not a weapon.

The preferred distance for attacking with this item. Only relevant for weapons. Used to determine how far away the character wielding the weapon can be from the target and considered to be in melee range - although really this is controlled by the appearance.2da sizes of each creature.

The minimum number of models of this type. The actual value to put in here is the range you want x 10. 

For Multi-Part Items (Weapons): A value of 10 here indicates that your model numbering starts at 011, incrementing by one to 019, before indexing by 10 (e.g. 019 >> 021-029 >> 031 etc. 

The maximum allowed number of models of this type. The actual value to put in here is the range you want x 10. The maximum possible value is 255 (although the Bioware docs suggest 999).

For Multi-Part Items (e.g. Weapons):  The MaxRange should be set no higher than 249, as the hard-limit is 255, capping the range for model 25 below 9. When reading model numbers, the first two digits correspond to the Model field of the drop down menus under "Item Properties>>Appearance" in the Toolset. The last digit of the MDL filename corresponds to the Color field in the drop down menus. The range of colors available for higher Model numbers is solely dependent upon the number of colors available in the lowest range. For example, if you only have models numbered 011-014, higher level Model numbers will only display a range of 4 Colors. Thus, continuing the example, if you added models 015-019, you would enable colors 5-9 in the Color drop down menu. 

Note, model numbers ending as "0" (e.g. 010, 020, 030, etc.) appear as Color 0 in the Color drop down menu.

For Single-Part Items: The full range of numbers is available starting at the MinRange value and ending at the MaxRange value. 

0 - none

1 - melee

2 - ranged

3 - shield

4 - armor

5 - helmet

6 - ammo

7 - thrown

8 - staves

9 - potion

10 - scroll

11 - thieves' tools

12 - misc

13 - wands

14 - rods

15 - traps

16 - misc unequippable

17 - container

19 - healers

Not sure what this is used for tbh. Possibly legacy Toolset categorisation. Can be blank with no issues it seems (eg; Creature Weapons are blank). Maybe was once going to be used to sort the inventory? Or does something hidden in the engine?

Worth setting just in case.

The base value (in gold pieces) of an unenchanted item of this type.

Note that darts use the value "0.1" for this so need to determine the real properties of this column. The game UTC files use a DWORD to store the value for later use.

The maximum number of this item type that can be combined (stacked) in one inventory icon. For example, most items have this set to 1, while arrows have this set to 99.

Absolute realistic maximum is 65535 as defined by the UTC file WORD stored value - which means if a save game (or BIC is exported) with a stack over this number it will probably make the value mess up incredibly.

A multiplier for the base value, used after the value of enhancements is added in? Used to reduce the per-item cost of some stacked items, such as arrows.

The minimum number of "cast spell" properties items of this type must be given when designed in the Toolset.

Need to test: Does this realistically do anything other than affect the item wizard?

0 = armor and clothing

1 = weapons

2 = potions and scrolls

3 = wands and magic items

4 = miscellaneous.

0 = dodge

1 = natural

2 = armor

3 = shield

4 = deflection

0 - no rotation

1 - rotate 90 degrees around positive y-axis

2 - rotate 90 degrees around positive x-axis

1 = arrow

2 = bolt

3 = bullet

4 = dart

5 = shuriken

6 = throwing axe

The index+1 into ammunitiontypes.2da that indicates the type of ammunition used by this weapon (item). This determines the models and sounds used during ranged attacks.

This may well be hardcoded according to the Bioware documentation (although admittedly the slots for ammo is hardcoded, as it were).

0 - default

1 - select spell, targets normally

2 - select spell, always targets self

Determines the behaviour when this property appears on the player's quick bar.

If set to 2, any cast spell item properties on an item of this type will always target the item's possessor (c.f. potions).

The chance (expressed as a percentage) that a character wielding this weapon (item) will be animated as making a slash from the left during an attack.

% chance to use the left-slash, right-slash, or stab animation when using this weapon.

**** if the item is not a melee weapon.

Left-Slash and Stab should add up to 100, and Right-Slash and Stab should add up to 100.

The Left and Right slash percentages are the chances of doing that move if the wielder is in the already proper stance. For example, a creature in the right-ready combat animation can only left-slash or stab, and after a left-slash, it enters the left-ready stance