93 lines
2.1 KiB
Markdown
93 lines
2.1 KiB
Markdown
# ER and attributes for combat
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### Entity
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A Battle has a Battle Number (the primary key) and Date(BattleDate) attribute.
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A Combat has a Damage, Weapon and a Result attribute.
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### Relationship: Involved (battle)
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A combat must have battle involved.
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A battle will contain at least on combat.
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### Relationship: Involved (Attacker / Defender)
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A combat must have at least 1 characters involved.
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A Characters may contain empty combat history
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# ER and attributes for characters
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### Entity
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A Characters has a Name(key), Type, Level, ExperiencePoints, MaxHealth, Health, AttackInScore, DefenceScore, StealthScore, ManaScore, MoneyBank MoneyWallet attribute.
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### Relationship: OwnedBy
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A character must owned by one player
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A player may have many characters
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### Relationship: OwnItems
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An Items must owned by one character
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A character may have many Items
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If a character is deleted from the game server, the items will be deleted
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### Relationship: Involved
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A Combat (either attacker/defender) must owned by one character
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A character may involved in many combats
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If a character is deleted from the game server, the combat will be deleted
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# ER and attributes for customers/players
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## Entity set
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A customers has a AccountNumber(key), Name and EMailAddress attribute.
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Name is a Multi-valued attribute containing Forename and Surname.
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## Relationship Owned By
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A Characters must owned by one character
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A customers/player may have many character
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If a customer/player is deleted from the game server, the characters will be deleted
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# ER and attributes for items/inventory
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## Entity set
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A Items has a ItemName, ItemType, WeaponType, Quantity, Range, SingleUse, Price, Equipped, BodyPart, Wearable, Worn attribute
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A Score is a Multi-valued attribute containing ManaScore, DefendScore and AttackScore.
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A ItemKey is an key to indicate the specific item
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## Relationship OwnedItems
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A Items must owned by one character
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A character may have many items
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If a character is deleted from the game server, the Items will be deleted
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# Overview of ERs
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