SIDEBAR: Using the Database Demo Program

You will be repeatedly prompted:  "Action?".  To exit, just press enter.
Any other entry commands a database action as follows:

/samples will cause the sample values to be asserted into the database.
 This is easier than entering each value by hand, and it's the only way
 to create an ival or lval object.

/show will cause the current database contents to be displayed.
 This also happens automatically after any command that changes the database.

<any name>? will report the value associated with any name, if any.
 The question mark is optional.  Any single word without a second
 parameter is treated as a query.

-<any name> will retract any name from the database if it's there.

<any name> <any string without spaces> will cause any name to be
 asserted into the database as an sval object with the value any string.
 Only the first contiguous word is part of the any string parameter.
 Any characters after that are ignored.