Multiple Instances of GTD Messages

A parameter in a GTD message can have multiple instances which need not be contiguous. In VoiceXML and JavaScript, indexing of instance numbers of GTD parameters starts with zero. For example, the first instance of a GTD parameter is referenced with the index number zero, the second instance is referenced with the index number one, the third instance is referenced with the index number two, and so on.

The syntax <gtd-object-name>.<gtd-parameter-object-name>[<instance-number>] refers to a specific instance. The property instance_count is exposed to every GTD parameter object. The VoiceXML script must first read this property before accessing a specific instance. The instance number must be less than or equal to the total number of instances read by the script.

For example:

<assign name="my_gtd" expr= "new
com.cisco.objclass.gtd(com.cisco.signal.gtdlist['setup_indication'])"/>
<assign name="total_uus_inst" expr="my_gtd.UUS.instance_count"/>
<assign name="uus2" expr="my_gtd.UUS[2]" >/
<assign name="uus2" expr="my_gtd.UUS[2].dat">/

GTD parameter instance numbers start with 0 for the first instance. For example,

<assign name= "my_gtd" expr= "com.cisco.signal.gtdlist['setup_indication']"/>
<assign name= "uus1" expr= "my_gtd.UUS[0]"/> ==> for first UUS instance
<assign name= "uus2" expr= "my_gtd.UUS[1]"/> ==> for second UUS instance