GroupOLD

Package: 
Is Abstract: 
no
Is Pattern: 
no
Definition: 

A primary packaging and publication module within DDI containing a Group of StudyUnits. The Group structure allows metadata regarding multiple study units to be published as a structured entity. Studies may be grouped "by design" such as a repeated study with intended areas of commonality between each study, or "ad hoc" where studies are grouped for applied or administrative reasons. When grouping is done "by design", such as within a longitudinal study, common metadata such as shared methodology, common category schemes, etc. may be moved up from the individual studies into the Group and inherited by all the members of the group. Inherited metadata may be over-ridden at the lower levels. Inheritance may be turned "off" for groups of study units done on an ad-hoc basis, such as a set of studies used for a particular activity such as instruction. The purpose of groups is described using the attributes which summarize relationships along the dimensions of time, panel, geography, instrument and language. These attributes allow the purpose to be machine-actionable, while the group also includes an element for describing the purpose in human-readable format. As a publication package Group contains a Citation, Abstract, information on authorization, the universe of the group, series statement, quality statements, ex-post evaluation material, funding and budget, purpose, coverage, analysis units covered, kind of data, other materials, a list of required resource packages and embargo information. It then allows all maintainable structures within the StudyUnit to be expressed at the Group level along with individual StudyUnits. StudyUnits may also be grouped into SubGroups allowing for infinite nesting of StudyUnits.

Property: 
NameCardinalityDatatypeDescription
citation
0..1
The citation for the group. DDI strongly recommends that at minimum a Title be provided.
abstract
0..1
An abstract of the group unit describing the nature and scope of the data collection, special characteristics of its content. Note that detailed information on the purpose of the group and structured coverage information are to be entered in Purpose and Coverage. Abstract supports multiple language versions of the same content as well as optional formatting of the content.
purpose
0..1
The purpose of the group, why the group took place. This should include detailed information on the investigator's primary group questions or hypotheses as well as information on any legal basis for the data collection, such as laws requiring the collection of census data for apportionment purposes. Legal or other authorization should be provided in detail within AuthorizationSource. Purpose supports multiple language versions of the same content as well as optional formatting of the content.
analysisUnit
0..n
Allows the use of a controlled vocabulary to list all of the units of analysis used in the group. Should be repeated to describe multiple units of analysis.
analysisUnitsCovered
0..1
A narrative of the units of analysis in the group unit. Uses an InternationalString to support multiple languages.
userDefinedGroupProperty
0..1
Provides a user-defined grouping property, different from those supplied in other attributes.
userDefinedGroupPropertyValue
0..1
Provides a value for the user-defined group property supplied in userDefinedGroupProperty.
isInheritable
0..1
Default is true, and allows for inheritance of all properties and modules, and the use of lower-level over-rides. If set to false, inheritance is switched off for specific groups.
Relationship: 
NameTarget ObjectDescriptionSource cardinalityTarget cardinalityRelationship type
authorizationSource
Identifies the authorizing agency for the group and allows for the full text of the authorization (law, regulation, or other form of authorization). May be used to list authorizations from oversight committees and other regulatory agencies.
0..n
0..n
Neither
universeReference
Reference to the universe statement from the universe scheme, describing the group of persons or other elements that are the object of research and to which any analytic results refer. Age, nationality, and residence commonly help to delineate a given universe, but any of a number of factors may be involved, such as sex, race, income, veteran status, criminal convictions, etc. The universe may consist of elements other than persons, such as housing units, court cases, deaths, countries, etc. In general, it should be possible to tell from the description of the universe whether a given individual or element (hypothetical or real) is a member of the population under group. A universe may be described as "inclusive" or "exclusive". This group level reference is normally to the top level of the UniverseScheme.
0..n
0..1
Neither
seriesStatement
A group, particularly one in a series, may be the result of two series merging into a single group. The new group belongs to both series. For example, Niger now fields the UNICEF Multiple Indicators Cluster Survey (MICS) and the Demographic and Health Survey as a single merged instrument.
0..1
0..n
Neither
qualityStatementReference
A reference to a Quality Statement pertaining to the quality of the group overall, metadata, or data to which it is associated. Quality statements may be related to external quality standards.
0..n
0..n
Neither
exPostEvaluation
An evaluation of the group process, often taking place after the completion of the group. These may include issues such as timing of the group, sequencing issues, cost/budget issues, relevance, institutional or legal arrangements etc. of the group. If the group is part of a series or group (i.e., a single wave in a longitudinal group) this may include evaluation of earlier waves which resulted in changes to the current wave.
0..1
0..n
Neither
fundingInformation
Contains details of the group unit's funding, including information about grants, agencies, etc.
0..n
0..n
Neither
projectBudget
This describes the overall budget of the group. It can be repeated for distinct budget activities. It contains a structured description and one or more budget documents described by an OtherMaterial type.
0..n
0..n
Neither
coverage
Describes the coverage of the group unit. Detailed information on Topical, Temporal, and Spatial Coverage is contained here. Note that Coverage at this level should be inclusive all lower level modules or section. Lower level descriptions serve to constrain coverage within the scope described here.
0..n
0..1
Neither
kindOfData
Briefly describes the kind of data documented in the logical product(s) of a group unit. Examples include survey data, census/enumeration data, administrative data, measurement data, assessment data, demographic data, voting data, etc. Supports the use of an external controlled vocabulary.
0..n
0..n
Neither
requiredResourcePackages
Specifies by reference the ResourcePackages required to resolve the group. This list is informational and assists in creating full transmissions of metadata or creating archival packages. Primarily used after the instance is relatively stable and published.
0..1
0..1
Neither
embargo
Embargo information about the group unit. References to embargo information in this section can be made from individual variables.
0..n
0..n
Neither
baseLogicalProduct
LogicalProduct applying to the group as a whole.
0..n
0..n
Neither
physicalInstance
PhysicalInstance applying to the group as a whole.
0..n
0..n
Neither
ddiProfile
DDIProfile applying to the group as a whole.
0..n
0..n
Neither
comparison
In-line Comparison of differences between related objects in different study units or due to versioning.
0..n
0..n
Neither
studyUnit
A StudyUnit within the Group provided in-line.
0..n
0..n
Neither
dataProduct
Indicates how all members of the group are related in terms of physical data products in relation to data collection efforts.
0..n
0..1
Neither
languageRelationship
Indicates how all members of the group are related in terms of language relationships such as parallel content in multiple languages, translations (full or partial), etc.
0..n
0..1
Neither
otherMaterial
The OtherMaterial object Contains references to other materials relevant to the group unit, whether in DDI form or external. Links can be made from items in this section to any identifiable element in the instance. Best practice is to include OtherMaterial inside the maintainable containing the objects that are related to the OtherMaterial.
0..n
0..n
Neither

Stage:

DDI 3.2: 
g:GroupType
Is extendable: 
Is property: 
0
RDF Mapping: 

Comments

larry's picture

Should the subGroup relationship within Group be an aggregation or composition? (can a subgroup belong to more than one group)?