edktool Command-Line Tool > Eduction Parameters > ZoneStartN

ZoneStartN
An Eduction regular expression that defines the starting point of the zone. Replace N with the zero-based rank of the zone.
A zone is a section of a field defined by a starting and ending pattern. Zones locate entities in parts of a field. If you do not add zone entries, the entire field is matched for text. If a starting pattern is absent, the search begins at the start of the field and ends with a match for the ending pattern.
Use the EntityZoneN parameter to associate an entity identified in an EntityN parameter with one or more zones defined using the ZoneStartN and ZoneEndN parameters.
 
NOTE You must choose start and end patterns that do not match the same text in a field.