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Describe the types of attributes?
Types of attributes: An attribute's category determines the type of values that are permitted in the attribute. For instance, the value version 1 is not valid for an attribute described as an integer, but the value 1 is valid. Numeric types (such as integer or real) can also be limited to a predefined range through their attribute definition.
Choice : An attribute along with a list of predefined values.
ID Reference: An attribute along with a value which is a Unique ID value from another element. It is typically used for element-based cross-references.
ID References: An attribute along with a value of one or more Unique ID values from another part.
Integer: An attribute along with a whole number value (no decimal parts). Examples of valid integers are 22, -22, and +322. An integer could be described to fall within a range.
Integers: An attribute along with a value of one or more integers. Enter each number on a separate line within the Attribute Value text box. Real An attribute along with a real number value, with or without a decimal part (the value could also be expressed within scientific notation). Examples of valid real numbers are 2, 22.4, -1 0.22, and 2.3e. A real number could be described to fall inside a range.
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