Packages

CORE

• primitives
• extended primitives
• identification, versioning
• grouping, comparison
• technical modeling stuff

CONCEPTUAL

• universe, concept, category, unit
• representations, codelists, classifications
• represented variables, conceptual variables

STUDY

• study info
• study inception (design, data management planing)
• collection
• archiving, preservation
• access, discovery

DATA

• logical data structures
• physical data structures
• data sets
• instance variables (raw and derived variables)

PROCESS

GEOGRAPHY

INSTRUMENT / DATA SOURCE

• questionnaires, routing
• access to administrative data
• questions, items

METHODOLOGY

• data transformations (e.g. formulas)