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Semantic Data Types

Each data element of an expression has a semantic data type. The semantic data type describes how the expression element can be used. The semantic data type of a field is defined in the table definition and determines what operations and conversions can be performed on values of the field. Operators in the rules language are defined only for meaningful semantic data types. For example, negating a string or adding a number to an identifier are invalid operations (for example, adding 3 to a license plate number).

Valid Semantic Data Types

The following table describes the semantic data types, the valid syntax for each data type, and the operations that can be performed on each data type:

Semantic Data Type	Name	Description	Possible Operators	Valid Syntax
	Typeless	Literals defined in TIBCO Object Service Broker rules and fields defined without a semantic data type. Example: name = ‘Analyst’.	Relational Concatenation Assignment Arithmetic Logical	B, C, F, P, RD, UN, V, W
C	Count	Only integer numbers (no fractions) used for integral count. Example: An inventory count (zero items or more items; there is never half an item).	Relational Concatenation Assignment Arithmetic	B, C, P, UN, V
D	Date	Used for dates; you must include at least a year. Valid dates range from 0000/01/01 to 9999/12/31 inclusive. Example: The hire date of an employee: Jan 05, 1998.	Relational Concatenation Assignment Arithmetic (addition and subtraction)	B
I	Identifier	Unique identifier Example: The employee identifier: A1082.	Relational Concatenation Assignment	B, C, P, UN, V
L	Logical	Information meeting Yes or No conditions. Example: Used as a flag: Is this employee current?	Relational Concatenation Assignment Logical	C
Q	Quantity	Real numbers used for measurement. Example: The salary of an employee: $950.57.	Relational Concatenation Assignment Arithmetic	B, C, F, P, UN, V
S	String	Character string data. Example: The position of an employee: Analyst.	Relational Concatenation Assignment	C, RD, UN, V, W

See Also

TIBCO Object Service Broker Managing Data about defining TIBCO Object Service Broker tables.

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