There are twelve types of metadata items used in METeOR:
Classification scheme - An official terminological system, recognised and endorsed by a national or international body, that is used to classify data.
Data element -The basic unit of identifiable and definable information created by combining a data element concept and a value domain.
Data element concept - A concept created for the purposes of defining a data element by the union of an object class and a property.
Data set specification - A collection of data elements which are collected as a set.
Glossary item - A glossary item defines the meaning of a term within a specific context.
Indicator - A statistical measure used to describe the progress or performance of the health or welfare system. This may be linked to a population or a number related to the provision of goods and services-output.
Indicator set - A single or multi-word designation assigned to a set of indicators.
Object class - Represents an entity, place or event that is of interest and needs to be described.
Outcome area - A statement that specifically defines the target, standard or the ideal result of the indicator, against which performance is to be assessed.
Property - A characteristic of the object class of interest.
Quality statement - A statement of multiple quality dimensions for the purpose of assessing the quality of the data for reporting against the Indicator.
Value domain - A set of permissible values by which a data element can be implemented. The value domain may be enumerated (e.g. a code) or non-enumerated (e.g. a total).