Working with elements of type list

The XML Schema specification allows an element, or attribute, to contain a list of values that are based on a simple type, with the individual values separated by white space.

About this task

In the message tree, an xsd:list element is represented as a name node, with an anonymous child node for each list item. Repeating lists can be handled without any loss of information.

Consider the following XML input message:

 <message1>
   <listE1>one two three</listE1>
 </message1>

This XML element produces the following message tree:

 MRM
	listEl  (Name)
		"one"   (Value)
		"two"   (Value)
		"three" (Value)

Individual list items can be accessed as ElementName.*[n].

For example, use the following ESQL to access the third item of listE1:

 SET X = FIELDVALUE (InputBody.message1.listE1.*[3]);

An attribute can also be of type xsd:list.

Consider the following XML input message:

 <message1>
	<Element listAttr="one two three"/>
 </message1>

This XML element produces the following message tree:

 MRM
	Element	(Name)
		listAttr	(Name)
			"one"	(Value)
			"two"	(Value)
			"three" (Value)

As before, individual list items can be accessed as AttrName.*[n].

For example, use the following ESQL to access the third item of listAttr:

 SET X = FIELDVALUE (InputBody.message1.Element.listAttr.*[3]);

A list element can occur more than once.

Consider the following XML message:

 <message1>
	<listE1>one two three/listE1>
	<listE1>four five six/listE1>
 </message1>

The message tree for this XML message is:

 MRM
	listE1	(Name)
		"one"	(Value)
		"two"	(Value)
		"three" (Value)
	listE1	(Name)
		"four"	(Value)
		"five"	(Value)
		"six" (Value)

Code the following ESQL to access the first item in the second occurrence of the list:

 SET X = FIELDVALUE (InputBody.message1.listE1[2].*[1]);