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Values consist of data structures that can exist within local names, in procedures, for example, or in attributes, and which are generated as the result of expression evaluations.

Values have a type, which can be:

• integer

• float

• text

• truth-value

• symbol

• sequence

• structure

• Knowledge in attributes

• Local names in executable items, such as procedures and rules

• Knowledge not stored in attributes, such as the item-x-position of an item.

• The current value of variables and parameters

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