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® Sensor Events can
process. Event converters are specific to each event provider and
can be provided as plug-ins.
- Event database
- A database that stores all events that are sent by Location Awareness Services for WebSphere Sensor Events.
- Event device
- A third party that receives the tag signal and transmits the data
to an event provider.
- Event group
- A group of related messages. A filter is defined to route certain
types of alert messages to the related message queue.
- Event provider
- A third party that monitors areas and feeds Location Awareness Services for WebSphere Sensor Events tag
data. Event providers are not part of Location Awareness Services for WebSphere Sensor Events, so
they must be defined within Location Awareness Services for WebSphere Sensor Events. They
must be configured for an existing area so that Location Awareness Services for WebSphere Sensor Events can
track tags within that area.
- 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.
- 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
- An event provider that, as a whole or with a special part of its
infrastructure, reads tag IDs into the Location Awareness Services for WebSphere Sensor Events 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 Sensor Events:
- 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 Sensor Events 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 Sensor Events 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.