Attachment level

Property of an attribute defining the object to which data or metadata are linked.

For each attribute specified in a data structure, there is a definition of whether this attribute takes: a value for each observation in the data set, or; a value for each time series in the data set, or; a value for each group in the data set, or; a single value for the entire data set. Some metadata concepts (e.g. frequency) may not be meaningful at the observation level, but only when applied to a higher level (e.g. to a time series of observations). Time, on the other hand, is meaningful at observation level, because every observation is associated with a specific point or period in time. Data Structure Definitions and Metadata Structure Definitions provide information about the level at which a particular concept descriptor is relevant: at observation level, time series level, group level, dataset level or even agency level. This is known as the attachment level of the concept.

urn:sdmx:org.sdmx.infomodel.conceptscheme.Concept=SDMX:CROSS_DOMAIN_CONCEPTS(2.0).ATTACHMENT_LEV