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34 LonBridge Device Class File

LonBridge Device Class File Format

A LonBridge device class file is an XML document that the LonBridge Server

uses to define the interface for a device interface for a specified program ID.

When a device is discovered, the LonBridge Server searches the Classes directory

for a device class file with a matching program ID (see

Classes Directory

on page

13).

Table 7 lists the XML elements that a device class file includes.

Table 7. XML Elements for a Device Class File

Element Description

<attribute> Defines the attributes for a device

<attributes> Is a container element for the device attributes that are present

on the device

<byte> Defines the fields within a network variable

<device> Defines the device class, and is the top-most element within a

class file

<enum> Enumerates each network variable defined for an <attribute>

element

<nv> Defines the bytes that are sent on the LONWORKS network for a

network variable update to the device

<nvs> Is a container element for the network variables defined for each

<attribute> element

XML Elements for a Device Class File

The <attribute> element defines the attributes for a device.

For an <attribute> element within a <byte> element, the attribute name

must map an <attribute> element that is defined within the <attributes>

element.

Table 8 lists the attributes for the <attribute> element.

Table 8. Attributes for the <attribute> Element

Attribute Description Required?

enum Defines whether the attribute has an

enumeration of values within an enclosed

set of <enum> elements.

Optional

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