Concept Schemes

The main classification for the European ITGS (International trade in goods statistics) is the Combined Nomenclature (CN). This is the primary nomenclature as it is the one used by the EU Member States to collect detailed data on their trading of goods since 1988. Before the introduction of the CN, ITGS were based on a product classification called NIMEXE. The CN is based on the Harmonised Commodity Description and Coding System (managed by the World Customs Organisation (WCO). The Harmonised System (HS) is an international classification at two, four and six-digit level which classifies goods according to their nature. It was introduced in 1988 and, since then, was revised six times: in 1996, 2002, 2007, 2012, 2017 and 2022. The CN corresponds to the HS plus a further breakdown at eight-digit level defined to meet EU needs. The CN is revised annually and, as a Council Regulation, is binding on the Member States.

All geographical features in GeoNames are categorized into one out of nine feature classes and further subcategorized into one out of 645 feature codes.

Date and time format

BONSAI is a work output of the GTDR project. This classification extends EXIOBASE with much more detail on individual products. Original data from https://gitlab.com/bonsamurais/bonsai/util/classifications/-/blob/main/src/classifications/data/flow/flowobject/tree_bonsai.csv

CPC constitutes a comprehensive classification of all goods and services. CPC presents categories for all products that can be the object of domestic or international transactions or that can be entered into stocks. It includes products that are an output of economic activity, including transportable goods, non-transportable goods and services. CPC, as a standard central product classification, was developed to serve as an instrument for assembling and tabulating all kinds of statistics requiring product detail. Such statistics may cover production, intermediate and final consumption, capital formation, foreign trade or prices. They may refer to commodity flows, stocks or balances and may be compiled in the context of input/output tables, balance of payments and other analytical presentations. The CPC classifies products based on the physical characteristics of goods or on the nature of the services rendered. CPC was developed primarily to enhance harmonization among various fields of economic and related statistics and to strengthen the role of national accounts as an instrument for the coordination of economic statistics. It provides a basis for recompiling basic statistics from their original classifications into a standard classification for analytical use.

Set of ecoinvent products (intermediate exchanges) extracted from publicly available metadata

Set of ecoinvent products (intermediate exchanges) extracted from publicly available metadata

Set of ecoinvent products (intermediate exchanges) extracted from publicly available metadata

The QUDT, or "Quantity, Unit, Dimension and Type" schema defines the base classes properties, and restrictions used for modeling physical quantities, units of measure, and their dimensions in various measurement systems. The goal of the QUDT ontology is to provide a unified model of, measurable quantities, units for measuring different kinds of quantities, the numerical values of quantities in different units of measure and the data structures and data types used to store and manipulate these objects in software. Except for unit prefixes, all units are specified in separate vocabularies. Descriptions are provided in both HTML and LaTeX formats. A quantity is a measure of an observable phenomenon, that, when associated with something, becomes a property of that thing; a particular object, event, or physical system. A quantity has meaning in the context of a measurement (i.e. the thing measured, the measured value, the accuracy of measurement, etc.) whereas the underlying quantity kind is independent of any particular measurement. Thus, length is a quantity kind while the height of a rocket is a specific quantity of length; its magnitude that may be expressed in meters, feet, inches, etc. Or, as stated at Wikipedia, in the language of measurement, quantities are quantifiable aspects of the world, such as time, distance, velocity, mass, momentum, energy, and weight, and units are used to describe their measure. Many of these quantities are related to each other by various physical laws, and as a result the units of some of the quantities can be expressed as products (or ratios) of powers of other units (e.g., momentum is mass times velocity and velocity is measured in distance divided by time).

A vocabulary for representing latitude, longitude and altitude information in the WGS84 geodetic reference datum.