38. Concordances between different classifications identify the relationship between respective categories. An item in one classification can be equivalent to one or more whole or part items in another classification. A concordance may therefore serve as an index to assist in locating individual categories in related classifications.
39. This publication includes tables of concordances between ANZSCC items and related items of the ANZSIC, HS, SITC and CPC. In particular, a concordance linking ANZSIC industries of origin to ANZSCC items is included to assist those wishing to analyse the commodity coverage of ANZSIC industries.
40. However, care needs to be taken in relating commodity statistics to their industry of origin. ABS industry statistics are based upon information from businesses which are classified to their main industrial activity. This means that any secondary industrial activity by a business will be accounted for under its primary industry classification. Therefore, commodity aggregates calculated on an industry of origin basis will not necessarily be compatible with official industry statistics. This concept is explained further in the introduction to the ANZSIC (ABS Catalogue No. 1292.0; SNZ Catalogue No. 19.005.0092).
41. A concordance linking ANZSCC items to ASCC items is also included to assist in comparing commodity statistics over time. Concordances to New Zealand production items will become available as surveys utilising ANZSCC categories are developed.
42. A concordance does not necessarily enable exact comparability between data compiled according to different classification schemes. The main difficulty in using concordances is in knowing how to treat part relationships. This usually involves determining the scope of the categories under consideration in both classifications and determining which components of the categories are shared in common. For example, some ANZSCC items are the direct equivalent of HS items, while many are either combinations of HS items or dissections of HS items. To establish the level at which comparisons can be made, where the relationship is other than one to one, it is necessary to aggregate the HS components of multiple ANZSCC items to the point where they can be grouped together for comparison with equivalent groups of import or export items.
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