After entering the system the user selects "tax" on the Program Type 

 search menu in WPRO. Returning to the WPRO menu, he finds 2 "hits." 

 As you recall, this means there are 2 taxation programs of some sort 

 in the states (some states may have more than one). Now, instead of 

 hitting "X" and executing the search, select "acq" from the Program 

 Type menu, resulting in 2 "hits." At this point the WPRO Search Menu M. 

 lists 2 hits for "tax" and 2 for "acq." 



Note that he could elect to do a combined search now, which vrould 

 list all the information for each state's taxation and acquisition 

 programs. Since our user really is only interested in the cumulative 

 impact (one of the program attributes), he will further restrict the 

 search. 



The user now returns to the WPRO menu and selects "2" to pick the 

 attribute he wants to check. He selects "cui" for Cumulative Impacts 

 and enters it. The search menu is redisplayed, and now shows 5 

 "hits" for ciunulative impacts. 



Now we will conduct the combined search by pressing "LI" and a 

 Return/Enter. A screen very similar to Figure 18 now appezurs. This 

 screen shows the recent search topics (tax, acq, and cui) and the 

 ntunber of hits for each (2, 2, and 5). The search topics are shown 

 under the heading REQUEST, and the number of hits under the heading 

 ITEMS. 



At this point we are ready to enter the Boolean operators (see 

 Appendix for list), and indicate which items are to be combined. Our 

 user, remember, wants to look for all taxation and acquisition 

 programs, but only the cumulative impact attributes of these 

 programs. In Boolean terms, this is expressed ast taxation OR ^ 

 acquistion AND cumulative. Figure 19 shows how this is entered into ^ 

 the system. 



The order of the entry is not important, except for the location of 

 the Boolean operators between the- items. For example, the combined 

 search could have been made: cumulative AND acquisition OR 

 taxation. On the screen this would have been entered ast 3 AND 2 OR 

 1. Finally, when done with the combinations, press a return when 

 asked for the next Boolean operator to terminate the prompts and 

 begin the combined search, and go to the display screens (not shown 

 here ) . 



32 



