[DDI-SRG] Bug 122

[Wendy Thomas]

bug 122 has been updated based on comments from Achim it includes a 
revised proposal with 2 points that need discussion tomorrow.

Revised Proposed Solution:

CHANGE:
Move CodeSchemeReference and Code to

CHOICE: 0..n
   CodeSchemeReference
   Code
ENDCHOICE

in CodeScheme

REPLACE Code in CodeType with the same choice structure thereby allowing 
nesting of CodeScheme within a code

ADD EXTENSION to CodeSchemeReference:
        add optional attribute levelNumber to assign a level number to all
members of a non-hierachical CodeScheme so that it can be imported at a
specified level (to make subordinate to a total)
        add optional attribute parentLevel to assign a parent level to the 
top level of a hierarchical code list

        <EditsForCurrentUse> 0..1
            <CodeValue attributes: newLevelNumber (0..1) newIsDiscrete
(0..1)> 1..n


PLEASE NOTE: This did not include Achim's suggestion of putting the 
renumbering of levels in the CodeSchemeReference. This structure is used 
in Variable and you do not want to provide the option of changing levels 
for use within the variable. In this case selectling a level has a totally 
different meaning. In fact we should review the meaning of the items in 
CodeSubsetInfo in each case. For Variables this means take only a 
specified level or levels, take the most discrete, or take specified 
codes/code ranges. They must retain their original meanings for use in 
both structures.

PLEASE NOTE:

Request was also made to change Level Number to a string to allow for 
alpha numeric codes in use in many systems since there is no order 
implication in the Level Number. First that information (the actual code 
used in the system) goes in the code value. It would be nice to be able to 
insert a new level in an appropriate location such as 1.1 or 1_1 or 1a. 
However I think "string" is way to inclusive.





Wendy L. Thomas                          Phone: +1 612.624.4389
Data Access Core Director		 Fax:   +1 612.626.8375
Minnesota Population Center              Email: wlt at pop.umn.edu
University of Minnesota
50 Willey Hall
225 19th Avenue South
Minneapolis, MN 55455