manually defined label tags to manipulate data
an administratively defined label tag is a convenient way to reference a complete label string (that is, a combination of label components).
as illustrated in table 6-1, for example, the tag "31110" could stand for the complete label string "s:op:wr".
label tags can be used as a convenient way to partition data. for example, all data with labels in the range 1000 - 1999 could be placed in tablespace a, all data with labels in the range 2000 - 2999 could be placed in tablespace b, and so on.
this simplified notation also comes in handy when there is a finite number of labels and you need to perform various operations upon them. consider a situation in which one company hosts a human resources system for many other companies. assume that all users from company y have the label "c:alpha:cy", for which the tag "210" has been set. to determine the total number of application users from company y, the host administrator can enter:
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