Field tags are used where the value from a field displays on the screen (as with a variable tag), but where the attributes of that field are not known prior to runtime. For instance, if a field is defined in the display file DDS as having a number of possible attributes, each dependent on a different indicator, then the field tag is used instead of the variable tag. The resulting tag is the same as the results of a variable tag, but include various field attributes, such as font color and underlining.
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