Navigation  without Java Scripts

PIE Environment

The main window of Web PIE is separated into three frames:

Header
PIE Control Panel
Output Panel

Header

This frame contains PIE logo and the hyperfield to invoke this help.

PIE Control Panel

Control Panel occupies the leftmost frame. It allows you to enter the Prolog program and execute the goal. Control Panel contains the following elements:

Goal - text field where you eneter the goal being executed.
Prolog Text - simple editor, that allows you to enter and edit Prolog program. In order to apply changes, you need to reconsult enetered text.
Run - pressing this button you execute the current goal.
Reconsult - this button allows you reconsult the internal PIE database from the editor.
Reset - this button removes all facts and rules from PIE database.
Clear - this button clears the editor and goal field. Note, that it is not clears the PIE database.
Examples - these buttons allow you to load and test three popular Prolog examples. After selected example is loaded, press Reconsult, then Run.

Output Panel

Output Panel occupies the rightmost frame. It is here you see tis text. The Prolog program's output (produced by write predicate) is displayed in this panel. PIE itself writes all messages here.