MULTIple organisation searches (or POWER searching)
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With the original version of this interface, and with many other interfaces
too, it is difficult to search for Directory entries about people if you do 
not know the organisation in which the person works.  
   It is now possible to search many organisations in a single query.  For 
example, you can express a query which will find all the Smiths working in 
Physics departments in the UK.  You don't even have to know the department 
name, so you can even look for anyone called Hedberg in Sweden.
   As you might expect, this type of querying takes a little longer than
queries where you are able to supply an organisation name, but it is probably 
faster than you might think.
   There are some subtle differences between the type of matching which the 
program tries when power searching as opposed to in its simple mode; these 
points are explained at the end of this help screen.

You can select this mode of querying by typing the letter `p' at the prompt 
for a person's name.  Some example queries (with very abbreviated prompts):

1. Find all the Smiths in Physics departments in the UK

person>  smith
dept>    physics
org>
country> uk

Leaving the organisation field blank means that all orgs are searched.

2. Find all the Hedbergs in Sweden

person>  hedberg
dept>
org>
country> sweden

Leaving both the department and organisation fields blank means that all
departments of all organisations are searched.  This is actually quicker
than searching for people within a named department.

3. Find all the Blacks in UK organisations where the organisation name 
   contains the string of letters London.  (Any string will do - it doesn't 
   have to be a complete word.)

person>  black
dept>
org>     london
country> uk

A quick explanation of a difference between power searching and ordinary 
searching, and a comment on behaviour which you may find hard to understand.

Because power searching is liable to get so many more results than an 
ordinary search, the types of matching tried when power searching are slightly
more restrictive. This means that you will not always get exactly the same 
results from a power search as from a search in simple mode.  Surnames, or 
an initial followed by a surname, are recommended forms.

The results from a search across many organisations are not ordered.  The 
decision has been made to present the results as they come, as it is 
anticipated that a user will probably terminate a search as soon as the
required result is delivered.  Comment if you don't like the behaviour.
