Tag get-data-item

<get-data-item> get data from a single custom tag

name: get-data-item
xml namespace: http://moyaproject.com

Get a single data item.

attributes
name	purpose	type	required?	default	choices
`from`	Application	application reference	No
`ns`	XML namespace	text	Yes
`tag`	Element type	text	No

inherited attributes
name	purpose	type	required?	default	choices
`dst`	Destination	reference	No
`if`	Conditional expression	expression	No	`yes`
`value`	Value	expression	No	`None`