Sets or gets the description of the the hierarchical syntax.
Syntax:
Parameters:
Example
sValue = oSegment.DescribeSyntax("\UNB\UNG\UNH\BGM")
sValue will have the following description: "Searching from the top of the document. Data Segment UNB at instance 1. Data Segment UNG at instance 1. Data Segment UNH at instance 1. Data Segment BGM at instance 1. "