Filter rules

Filter rules

Overview

Filter rules are the building blocks of saved filters in NAO Viewer. They define specific criteria for matching assets based on property values and comparison operators.
Access: Applications > [Your Application] > Filters menu (left navigation) > Filter Rules


Info
You need to create or edit a saved filter to access filter rules configuration.

Understanding Filter Rules













Basic Structure

Each filter rule consists of three components:
- [ 1 ] Property Type: The trackable attribute to evaluate
- [ 2 ] Operand: The comparison operator
- [ 3 ] Value: The target value to compare against

Rule Logic

- Multiple rules in a filter use AND logic
- All rules must match for a trackable to be included
- Example: Category = "Staff" AND Battery < 25


Operands (Comparison Operators)

Equal (=)

Exact match. Example: Category = "Staff"

Not Equal (≠)

Excludes match. Example: Status ≠ "Inactive"

Greater Than (>)

Numeric comparison. Example: Battery > 50

Greater or Equal (≥)

Numeric comparison including value. Example: Battery ≥ 25

Less Than (<)

Numeric comparison. Example: Battery < 25

Less or Equal (≤)

Numeric comparison including value. Example: Battery ≤ 10

Contains

Text contains substring. Example: Name contains "John"

Includes

Value is in a list. Example: Zone includes ["ER", "ICU"]


Creating Effective Rules

All rules are cumulative - trackables must match ALL rules to be included in results.

Examples

Single Rule
- Battery ≤ 25 (finds low battery devices)

Multiple Rules (ALL must match)
- Category = "Staff" AND Battery < 25 (finds staff with low battery)
- Zone includes ["ER", "ICU"] AND Is Active = true (finds active devices in emergency areas)


Troubleshooting

No Results: Check property values exist and operand is correct
Too Many Results: Add more specific rules to narrow results
Unexpected Results: Test each rule individually

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