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SYSTEM DESCRIPTION <br /> NR <br /> MapTrak: <br /> EXPRESSION <br /> +z <br /> �Pi Pi fifi. <br /> � <br /> �y y <br /> � <br /> ON, XNATVC� <br /> iii <br /> AddressX p+ String , <br /> AddressY p-DatefTime <br /> Agency 0..MathA# <br /> Alarms tale <br /> „ AptNumber E Y Trigonometric <br /> 4 AvlEnabled <br /> Boundary <br /> (II it II _ <br /> i, ill4yy w gm UE, <br /> 4 <br /> '^i I III <br /> zop .....g� <br /> �R <br /> FUNCTIONAL DESCRIPTION <br /> Open the Expression window by choosing Add on the Attribute Editor window's Label tab(see <br /> page 1-78), or on the Theme Editor window(see page 1-64). When the window first opens the <br /> Fields insert button is unavailable.All other fields and buttons are available. <br /> Functions are predefined formulas that perform calculations by using specific values, in a particu- <br /> lar order, or structure. For example,the Date/Time (Year)function returns the year of the date <br /> value. <br /> FIELDS AND BUTTONS <br /> Expression Alphanumeric field.Enter a theme expression. <br /> Logical Value <br /> Buttons Buttons. Select the logical value to add to the expression. <br /> 1-88 11/03/09 <br />