Note: when entering this form to edit a rule, and no current rule is selected, the various options are displayed automatically, once the cursor is placed in the rule text field.

Some rules are considered as general rules and accessed via RULF2001. The specialist user is able to edit or delete their rule description, as well as their rule text and/or comments in RULF2000. Other rules are required to be considered in context, for example unit version rules must be attached to a specific unit code and version. Specific rules can only be accessed via the relevant form (e.g. CRSF1700 for course version rules) and the specialist user is unable to change the rule description or comments, but can define the rule text in RULF2000.

Rules in Callista can provide a wide range of functionality including;

The rules syntax (or its available language), is made up of operators, parameters, functions and variables. These provide a range of tools for creation of rules. For a breakdown of the syntax for particular rules, see specialist links above.

This form includes a validation facility, which can be used to validate, and provide further options (The Options/Validate button). The available options displayed may be either the next logical operators, or instructions for entering of variables or successful/unsuccessful messages. Instructions are generally defined by the characters "***" displayed at the front and back of the instruction. If the rule is invalid, the validation facility breaks the rule i.e. text that fails to meet the logic of the rules syntax, is moved from the rule text box, and inserted in the Unprocessed field. The correct options are also displayed. Once corrections have been made to either the unprocessed text or the rule text fields, if the logic has been corrected, the text will be reinserted in the rule text area.

When saving a rule, the form initially performs a validation of the rule text, to ensure that it satisfies the logical structure, as determined by the available syntax. If a rule fails the validation, the rule is not saved, and the validation facility breaks the rule i.e. text that fails to meet the logic of the rules syntax, is moved from the rule text box, and inserted in the Unprocessed field.

Use this form to add, edit or delete rules.

On entering the form, using the Edit Rule button, the desired rule description appears.

On entering this form from another form via the Add Rule button, the desired rule group appears. Enter the rule description of the new rule.

Edit or create the rule directly by modifying the Rule Text, or use the Options/Validate button for available operators, parameters, functions or rules that are available. After the Options/Validate button is selected, the cursor returns to the Rule Text block.

To delete the rule, press the Delete button, and save the record.

Use the Rule Options button, to select a rule operator, parameter or rule. Alternatively, you can double click on the rule option text, or type the text in directly. When using the Rule Options button to insert a rule operator, the next options are automatically displayed.

Invalid rule text appears in the Unprocessed field.

Use this form to edit or delete rules.

On entering this form in context from another form via its Edit Rule button, the desired rule appears.

Edit the rule directly by modifying the Rule Text, or select from the Rule Options of available operators, parameters, functions or rules that display.

Use the Rule Options button, to select a rule operator, parameter or rule. Alternatively, double click on the rule option text, or type the text in directly. Where subsequent options are available, they will display automatically.

Invalid rule text, appears in the Unprocessed field.

Comments cannot be added or modified for these rules.