WebSphere brand IBM WebSphere Premises Server, Version 6.1.x

Glossary

This topic lists terms that are used in this documentation.

Alarm zone
Zone where access restriction rules or similar rules can be triggered when an item (usually person or asset) enters this type of zone. Restriction rules can also be set for other zone types, but they have additional semantics.
Area
A representation of the real physical space within the location to be monitored. Areas have a flat lower and an optionally flat upper boundary and are the container for all zones.
Boundary zone
Zone used to monitor tags entering and leaving another zone.
Container
Items that can contain other items. Tags that are added to a container inherit the position of the container. Also you can define the size of a container using the EDGELENGTH system property, which assumes the container is a cube.
Device
A device is used for an event provider to provide location, notification, or telemetry data. Devices always belong to a hub and can be grouped in device groups.
Event converter
Applications that convert external events into a format that Location Awareness Services for WebSphere® Premises Server can process. Event converters are specific to each location event provider and can be provided as plugins.
Event database
A database that stores all events that are sent by Location Awareness Services for WebSphere Premises Server.
Event group
A group of related messages. A filter is defined to route certain types of alert messages to the related message queue.
Exit zone
Zone used to determine whether a tag has exited the area. If the tag passed and no signals can be received thereafter, the item has left the area and there is no reason to be concerned about not receiving a signal.
Gate
An entry or exit to or from a zone that is monitored by one device.
Group
A container that allows grouping of items from different classes for common rules, searches, or so forth.
Item
Entities within a location that can be equipped with tags and whose positions can therefore be tracked. An example is an asset or person.
Item class
Class of items with common attributes. You can define sets of attributes and rules for each item class. For example, you might have the following classes: Person and Asset. Within these classes, you can also have subclasses with extended attributes.
Location
A real physical space that is made up of many areas.
Location event provider
A third party that monitors areas and feeds Location Awareness Services for WebSphere Premises Server tag location data. Location event providers are not part of Location Awareness Services for WebSphere Premises Server, so they must be defined within Location Awareness Services for WebSphere Premises Server. They must be configured for an existing area so that Location Awareness Services for WebSphere Premises Server can track tags within that area.
Location event device
A third party that receives the tag signal and transmits the data to the location event provider.
Notification channel
A channel definition that defines for a given subscriber the program or web service that should be called for an event, and the filter criteria under which the program or web service should be called.
Notification program
A program or web service that can be triggered when an event occurs.
Privacy zones
Currently, privacy zones behaves like alarm zones.
Registration unit
A location event provider that, as a whole or with a special part of its infrastructure, reads tag IDs into the Location Awareness Services for WebSphere Premises Server system for the purpose of defining an item for the first time.
Rule
Criteria or circumstances that are defined to trigger an event. For example, rules can be triggered during entry to or exit from a zone and can be specified for a tag ID, class, or group. You can set the following types of rules in Location Awareness Services for WebSphere Premises Server:
  • Zone entry and exit rules
  • Tag not responsive rule
  • Tag battery low rule
  • Proximity rule
  • Unknown tag rule
Shadow zone
Zone where the tags might not be visible temporarily because they are out of reach of the tag reader infrastructure or the signals are shielded. Location Awareness Services for WebSphere Premises Server assumes that a tag continues to be in the shadow zone at the last reported position after it has been seen. No alert is generated if the tag is no longer visible.
Smoothing algorithm
Algorithm used to smooth position estimates, so that tag icons do not move abruptly in the Spatial Management Client.
Subarea
An area that is nested within another area.
Subscriber program
A program that subscribes all, or a defined subset of, events arriving for a given event group. It dispatches the arriving events to the Location Awareness Services for WebSphere Premises Server notification programs.
Zone
Logical section within an area for which rules can be defined. A zone can span multiple subareas of the area to which it is related. It is the unit on which rules can be performed, and on which counts and statistics for a tag entering or leaving can be calculated. Rules can be defined for entering and exiting a zone.

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