xAL DTD Revisions
===============
Changes (Version 1.0 to Version 1.1):

May 10, 2001: - Added DependentLocalityNumber, Added NameType attribute for DependentLocalityName
	         - Added TypeNumberOccurence attribute for DependentLocalityNumber
	         - Changed StreetRange element to "StreetNumberRange"
	         - Changed StreetNumberType to "StreetNumberPrefix"  
May 15, 2001: - Changed "Street" to "Thoroughfare" as a Thoroufare could be street, road, river,
	           canal, etc. Introduced an attribute "type" for Thoroughfare. All the references
	           to Street have been changed to Thoroughfare.
May 17, 2001: - Included POBox and Thoroughfare in LargeMailUser Element
May 18, 2001: - DeliveryIdentifier Element included in AddressDetails element
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VERSION SUMMARY (Version 1.1 to 1.2):

May 21, 2001: - Included DependentLocality element under Thoroughfare element
	        - Changed "CountryCode" element to "CountryNameCode"
May 28, 2001: - Added a new attribute "Separator" to ThoroughfareNumberRange element
                           - Added a new attribute "PremiseNumberSeparator" to SubPremiseNumber 
                             element
June 14,2001: - Added an attribute "SupplementaryInfo" to the following elements:
                             Locality, DependentLocality, Thoroughfare, DependentThoroughfare, 
	          Premise, SubPremise
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VERSION SUMMARY (Version 1.2 to 1.3):
Sep 04, 2001: - Added an attribute NumberType for PremiseNumber and SubPremiseNumber
	        because some premises have old and new numbers.
Oct 03, 2001: - Added an attribute UsageType for AdministrativeArea, SubAdministrative
		Area, Locality and DependentLocality. Sometimes locations must be 
		distinguished between postal system, and physical locations as defined
		by a political system
November 16, 2001:
	      - Added an attribute NumberSuffixConnector and NumberPrefixConnector for
		the following elements: ThoroughfareNumber, PremiseNumber, SubPremise Number,
		and PostOfficeBoxNumber
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May 31, 2002 : MAJOR RELEASE
Version 2.0

Not backward compatible with V1.3.
Includes new structures, re-organised structures and provides full namespace support.