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Residual ‘nec’ categories
Residual or 'not elsewhere classified' (nec) categories capture cultural and ethnic groups that are not separately identified in the main structure of the classification due to their low statistical significance. These categories are represented by four digit codes where the first two digits identify the narrow group to which they relate and the final two digits are '99'. The classification currently has 24 'nec' categories.
'NEC' codes are part of the main structure of the Australian Standard Classification of Cultural and Ethnic Groups (ASCCEG).
Residual ‘Other’ narrow groups
In some broad groups, codes are reserved for residual categories at the narrow group level.
· Titles commence with ‘Other’.
· They include separately identified cultural and ethnic groups which do not fit into substantive narrow groups on the basis of the classification criteria.
· There are two of these groups in the classification - '49 Other North African and Middle Eastern' and '69 Other North-East Asian'.
Supplementary or 'not further defined' (nfd) codes are used to code responses that are insufficiently specific for the main classification structure to be used. They exist only for operational reasons. No data would be coded to them if sufficiently detailed responses were obtained in all instances.
Using supplementary codes enables responses or input data which can only be assigned codes at the broad or narrow group levels of the classification to be processed within a collection at the four digit level. The coding process can be as precise as the input data quality allows, preserving data that would otherwise be discarded as uncodable or aggregated with other data to which it is unrelated in the 'inadequately described' supplementary category.
Supplementary codes are not part of the classification structure. They are listed separately in Table 2 of the ASCCEG data cube (accessible from the 'Downloads' tab).
There are three types of supplementary codes:
Supplementary 'nfd' codes ending with zeros
· They are used to code responses which do not contain sufficient information to be accurately coded to a substantive (four digit) cultural or ethnic group but which can be coded to a higher level (broad or narrow group) of the classification structure.
· The response 'Celtic' does not contain sufficient information to be coded directly to a cultural or ethnic group or narrow group, but it can be coded to broad group '2 North-West European' as all Celtic cultural and ethnic groups originated and developed in North-West Europe. It is allocated the 'nfd' code '2000 North-West European, nfd'.
Supplementary codes commencing with zeros
· There are two supplementary codes of this kind: '0000 Inadequately described' and '0001 Not stated'.
Supplementary codes commencing with '09'
Four digit codes commencing with '09' are used to code ancestry responses which broadly describe the region of origin but cannot be coded to either a substantive cultural or ethnic group or to one of the 'nfd' codes. These codes allow the collection and storage of data for responses such as African, Asian, and European.
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