Rule Engine

The Rule Engine is a configurable, priority-ordered decision engine shared across the DEXPRO apps. It lets you express business decisions as rules instead of code — for example choosing the next process step, checking plausibility, or assigning an account in SQUEEZE, and deciding stage transitions or assignees in Advanced Workflow.

Purpose and business value

Many document-processing decisions differ by customer, vendor, amount, or document type. The Rule Engine puts those decisions in the hands of configurators: rules are evaluated in priority order, and the first matching rule determines the outcome. This keeps behavior transparent and adjustable without a development change.

Concepts

Rule Set

A Rule Set is scoped to exactly one primary table and can reference up to 50 related tables. It groups everything the engine needs to evaluate one kind of decision.

Rule Group

A Rule Group organizes rules within a rule set and orders them so they are evaluated in a defined sequence.

Rule

A Rule defines the actual condition to match. It supports:

AND / OR condition groups — combine several conditions with a logical connector.
Line match type — Any (a match on any record is enough) or All Records (every record must match).
Validity dates — a Valid From / Valid To window.
Active flag — enable or disable the rule.

Rule Condition

A Rule Condition compares a field against a value using a comparison operator. It can compare to a single value or to a reusable value set.

Value Set

A Value Set is a reusable list of values used by the In Set operator, so the same list can be referenced from many conditions.

Rule Validity Period

A Rule Validity Period restricts when a rule applies using weekday, time-of-day, and date windows.

Comparison operators

Equal
Not Equal
Greater Than / Greater Than Or Equal
Less Than / Less Than Or Equal
Contains
Begins With
Ends With
Between
In Set
RegEx

Testing rules

An interactive Rule Test page lets you evaluate a rule set against sample data and see which rule matches, so you can verify your configuration before it goes live.

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Validation messages

"Only one primary table allowed per rule set" — a rule set can have exactly one primary table.
"Maximum allowed: 50 tables" — you cannot add more than 50 related tables to a rule set.
"Valid To must not be earlier than Valid From" — the validity window must be in the correct order.
Operator-not-allowed-for-field-type — a comparison operator that does not apply to the selected field's data type is rejected (for example a text-only operator on a numeric field).

Rule Sets
Rule Card