Namespace Algenta.Colectica.Model.Ddi

Part of the GridAttachment implementation. Colectica will serialize and deserialize this, but will not provide any display or user interaction with this information, except through the SDK. We consider this section of the standard ambiguous and do not recommend using it.

ClassificationCorrespondenceTable

A Correspondence Table expresses the relationship between two Statistical Classifications. These are typically: two versions from the same Classification Series; Statistical Classifications from different Classification Series; a variant and the version on which it is based; different versions of a variant. In the first and last examples, the Correspondence Table facilitates comparability over time. Correspondence relationships are shown in both directions

ClassificationFamily

A Classification Family is a group of Classification Series related from a particular point of view. The Classification Family is related by being based on a common concept (e.g. economic activity).

ClassificationIndex

A Classification Index is an ordered list (alphabetical, in code order etc) of Classification Index Entries. A Classification Index can relate to one particular or to several Statistical Classifications. A Classification Index shows the relationship between text found in statistical data sources (responses to survey questionnaires, administrative records) and one or more Statistical Classifications. A Classification Index may be used to assign the codes for Classification Items to observations in statistical collections.

ClassificationIndexEntry

A Classification Index Entry is a word or a short text (e.g. the name of a locality, an economic activity or an occupational title) describing a type of object/unit or object property to which a Classification Item applies, together with the code of the corresponding Classification Item. Each Classification Index Entry typically refers to one item of the Statistical Classification. Although a Classification Index Entry may be associated with a Classification Item at any Level of a Statistical Classification, Classification Index Entries are normally associated with Classification Items at the lowest Level.

ClassificationItem

A Classification Item represents a Category at a certain Level within a Statistical Classification. It defines the content and the borders of the category. An object/unit can be classified to one and only one Classification Item at each Level of a Statistical Classification.

ClassificationLevel

A Statistical Classification has a structure which is composed of one or several Levels. A Level often is associated with a concept, which defines it. In a hierarchical Statistical Classification the Classification Items of each Level but the highest are aggregated to the nearest higher Level. A linear Statistical Classification has only one Level.

ClassificationMap

A Map is an expression of the relation between a Classification Item in a source Statistical Classification and a corresponding Classification Item in the target Statistical Classification. The Map should specify whether the relationship between the two Classification Items is partial or complete. Depending on the relationship type of the Correspondence Table, there may be several Maps for a single source or target Classification Item.

ClassificationSeries

A Classification Series is an ensemble of one or several consecutive Statistical Classifications under a particular heading (for example ISIC or ISCO).

Code

Associates a value with a Category.

CodeDomain

Represents a coded response to be collected by a Question.

CodeList

Provides a description of a set of categories that have a specific relationship, such as the categories Male and Female that can be grouped together as Gender. Categories (e.g., Male and Female) can belong to multiple code lists. The code list also provides the unique code values for each of the categories in the code list.

CodeListGroup

Represents a group of CodeList items.

CodeListScheme

Represents a collection of CodeList objects.

CollectionEvent

Represents information about a data collection event.

ComplianceDefinition

Provides a list of quality concepts in the quality standard.

CompositeWithSingleChildActivityBase

Represents a ControlConstruct with a single child, which is a CustomSequenceActivity.

Concept

Represents a unit of knowledge created by a unique combination of characteristics.

ConceptGroup

Represents a group of Concept items.

ConceptScheme

Represents a collection of Concept objects.

ConceptualComponent

Provides a wrapper to package information describing a statistical activity's conceptual basis.

ConceptualVariable

Represents the concept and universe applicable to a Variable.

ConceptualVariableGroup

Represents a group of ConceptualVariable items.

ConceptualVariableScheme

Represents a collection of ConceptualVariable objects.

Condition

Represents a conditional expression, specified in one or more source code languages.

ControlConstructGroup

Represents a group of ActivityBase items.

ControlConstructScheme

Represents a set of control constructs used in an Instrument.

Country

Represents a country.

CountryCode

Represents a country.

Coverage

Describes the temporal, geographic and topical coverage.

CustomIfElseActivity

Represents a collection of conditional branches in a data collection Instrument.

CustomIfElseBranchActivity

Represents a conditional branch inside a data collection instrument.

CustomLoopActivity

Represents a loop in a data collection instrument.

CustomSequenceActivity

Represents a sequence of items in a data collection instrument.

CustomUntilActivity

Represents a loop that executes until some condition is true in a data collection instrument.

CustomWhileActivity

Represents a loop that executes while some condition is true in a data collection instrument.

DataCollection

Describes information about data collection and post-collection processing.

DataCollectionFrequency

Documents the intended frequency of data collection, for example monthly, yearly, weekly, etc., preferably using an optional controlled vocabulary

DataCollectionItem

Represents a description of an aspect of the data collection process.

DataCollectionMethodology

Describes the methodology used in a data collection process.

DataFileIdentification

Identifies the data file documented in a physical instance and provides information about the file's location.

DataItem

Identifies a physical storage location for an individual data entry, serving as a link between the physical location and the logical content description of each data item.

DataRelationship

Describes the relationships among logical records in the dataset. Date Relationship is needed to create the appropriate link between the logical record and the physical storage description.

DataSource

Describes a source of data.

Date

Represents a single date. Dates may be represented at different levels of precision, for example, date and time, date only, month + year only, year only, etc.

DateRange

Represents a range of Dates.

DateSpecification

Represents a single date or a range of dates, specified at arbitrary levels of precision.

DateTimeDomain

Represents date and time information to be collected by a Question.

DateTimeType

Represents a type of date or time.

DdiInstance

Represents the top-level wrapper of a DDI 3 Document.

DdiItemFormatter

Provides methods to get information about DDI item, and to serialize and deserialize items of that particular type.

DdiItemIndexer

Default external indexing implementation

DdiItemStrings

A strongly-typed resource class, for looking up localized strings, etc.

DdiItemType

Defines identifiers for DDI 3 item types.

DistributionDomain

Allows distributing a number of points to a set of items in a QuestionGrid.

DomainSpecificValue

Value to which a response domain is attached.

Embargo

Provides information about data that are not currently available because of policies established by the principal investigators and/or data producers.

Fingerprint

Represents a digital fingerprint of a data file.

FundingInformation

Represents information about the agency or grants which funded an activity.

GeneralInstructionCoding

Describes coding instructions that pertain to data collection or data processing overall such as handling of non-response to questions, imputation practices, suppression rules, etc. Coding instructions should be listed separately to allow for referencing of specific processes.

GenerationInstructionCoding

Instructions for recodes, derivations from multiple question or variable sources, and derivations based on external sources. Instructions should be listed separately so they can be referenced by variables in the logical product.

GeographicBoundingBox

Represents a rectangle, oriented to the x and y axes, which bounds a geographic feature or a geographic dataset.

GeographicLocation

Describes specific instances of GeographicLocations

GeographicLocationScheme

Represents a collection of GeographicLocation objects.

GrossFileStructure

Grossly describes a file's structure.

GrossRecordStructure

Provides characteristics of the physical storage of a logical record type as described in a DataRelationship. Used by RecordLayouts to describe the full structure of a PhysicalInstance.

Group

Describes a series of research studies or other statistical activities.

GroupEnumExtensions

Provides extension methods useful for working with the enumerations that descripbe relationships among Group items.

HoldingInformation

Represents information about an archive's holdings.

Individual

Details of an individual including name, contact information

IndividualName

The name of an individual broken out into its component parts

InformationClassification

Rules and guidelines on how the data is allowed to be handled, transferred, stored and disposed

InstantMessaging

Represents an instant messaging address.

InstructionGroup

Represents a group of InterviewerInstruction items.

Instrument

Represents a data collection instrument, such as a survey.

InstrumentGroup

Represents a group of Instrument items.

InstrumentScheme

Represents a collection of Instrument objects.

InterviewerInstruction

Represents an instruction for an interviewer.

InterviewerInstructionScheme

Represents a collection of InterviewerInstruction objects.

Level

Used to describe the levels of the code scheme hierarchy. The level describes the nesting structure of a hierarchical coding structure. A level could have data attached to it (summary of its children) or no data attached to it (the equivalent of creating a category group in 2.0 and earlier versions Note that the attribute levelNumber is used for referencing specific codes to their level identifier.

LevelContext

Level Context provides the depth of a Level within a Statistical Classification together with its membership. Both depth and membership can be specified per Statistical Classification.

LifecycleEvent

Documents an event in the study lifecycle

Location

Describes a physical location and contact information for an organization.

LocationValue

A location of the specified geographic level

LogicalProduct

Represents DDI packaging for various information used to describe data. Consider using a ResourcePackage instead.

LogicalRecord

Describes a data record.

ManagedDateTimeRepresentation

Managed Representation for date time

ManagedMissingValuesRepresentation

Represents information about missing values.

ManagedNumericRepresentation

Managed Representation for numerics

ManagedRepresentationBase

Base class for Managed Representations

ManagedRepresentationGroup

Represents a group of ManagedMissingValuesRepresentation items.

ManagedRepresentationScheme

Represents a collection of ManagedMissingValuesRepresentation objects.

ManagedScaleRepresentation

Managed Representation for scales

ManagedTextRepresentation

Managed Representation for date time

Measurement

Represents a measurement or a field used to collect data.

MeasurementActivity

Represents a control construct in a data collection instrument that presents a Measurement

MethodologyItem

Describes an aspect of the methodology used to collect or process data.

MissingRepresentationCollection

Represents a collection of ResponseDomains that represent missing values. Only TextDomain, CodeDomain, and NumericDomain are allowed.

NCube

Describes an aggregate data cube defined by dimensions and measures.

NCubeGroup

Represents a group of NCube items.

NCubeScheme

Represents a collection of NCube objects.

NeutralAssignment

A block of neutral assignment statements

NeutralAssignmentStatement

An assignment statement

NeutralConditionalLogic

Represents a boolean expression in a non language specific manner

NeutralConditionalLogicGroup

One group of statements and associated group boolean operator

NeutralConditionalLogicStatement

A logical statement

NoDataByDefinition

Defines the cells within a grid that contain no content.

NominalDomain

Captures a marked vs. unmarked response. For example, "check here if...", in a QuestionGrid.

NumericDomain

Represents numeric data to be collected by a Question.

NumericType

Represents a type of number.

Operation

Represents an operation on data, such as cleaning or coding the data.

Organization

Represents an organization.

OrganizationGroup

Represents a group of Agent items.

OrganizationRelationship

Describes a relationship between organizations and/or individuals.

OrganizationScheme

Represents a collection of Organization objects.

OtherMaterialGroup

Represents a group of OtherMaterial items.

OtherMaterialScheme

Represents a collection of OtherMaterial objects.

Parameter

Represents data used as an input to or an output from a question or control construct.

ParameterValue

serialization of the parameter to a function

ParentBreadcrumbModel

Search result bread crumb model

PhysicalInstance

Provides information about a data file, database, or other store of data.

PhysicalProduct

Provides DDI packaging for information about the physical layout of data. Consider using DataRelationship and/or ResourcePackage instead.

PhysicalStructure

Describes the physical structure of a RecordLayout.

PhysicalStructureScheme

Represents a collection of PhysicalStructure objects.

ProcessingEvent

Describes a step in the data processing pipeline.

ProcessingEventGroup

Represents a group of ProcessingEvent items.

ProcessingEventScheme

Represents a collection of ProcessingEvent objects.

ProcessingInstructionGroup

Represents a group of GeneralInstructionCoding and GenerationInstructionCoding items.

ProcessingInstructionScheme

Represents a collection of GeneralInstructionCoding and GenerationInstructionCoding objects.

QualityStandard

Represents a set of fields used to describe the quality of a study, dataset, or something else. Each field is represented by a quality Concept. QualityStatement items can implement a quality standard to provide the specified information.

QualityStatement

A QualityStatement is used to describe how a study conforms to certain quality concepts.

QualityStatementGroup

Represents a group of QualityStatement items.

QualityStatementItem

Represents a single statement within a QualityStatement's set of statements.

QualityStatementScheme

Represents a collection of QualityStatement objects.

Question

Represents a question or a field used to collect data.

QuestionActivity

Represents a control construct in a data collection instrument that presents a Question, QuestionGrid, or QuestionBlock to the respondent.

QuestionBlock

Represents a series of questions asked about one or more stimulus materials, such as an image.

QuestionBlockMember

Represents a single item in a QuestionBlock. Members can be a stimulus material, a Question, or a QuestionGrid.

QuestionGrid

Represents a grid of questions, defined by question text and one or more dimensions. Dimensions can be pre-defined or rosters of items specified by the respondent.

QuestionGridAttachment

Corresponds to the DDI GridAttachment element. Colectica will serialize and deserialize the GridAttachment, but will not provide any display or user interaction with this information, except through the SDK. We consider this section of the standard ambiguous and do not recommend using it.

QuestionGridDimension

Represents a dimension of a question grid.

QuestionGroup

Represents a group of Question, QuestionGrid, and QuestionBlock items.

QuestionRoster

Represents a roster in a questionnaire. In a roster, the respondent is able to add as many lines as appropriate, and will provide responses for certain inputs for each of those lines.

QuestionScheme

Represents a collection of Question, QuestionGrid, and QuestionBlock objects.

RankingDomain

Allows ranking a set of items in a QuestionGrid.

RecordLayout

Represents the layout of a data record.

RecordLayoutScheme

Represents a collection of RecordLayout objects.

RecordRelationship

Represents a one-to-one relationship between LogicalRecords.

RepresentedVariable

Represents a variable's concept, universe, and data type.

RepresentedVariableGroup

Represents a group of RepresentedVariable items.

RepresentedVariableScheme

Represents a collection of RepresentedVariable objects.

ResourcePackage

Provides a package in which to store many types of metadata items.

ResponseDomain

Represents a type of data that can be collected by a Question.

ResponseText

Represents a ResponseDomain that collects no data. Provides a way to store text to be displayed between other ResponseDomains.

ScaleDomain

Represents a response on a scale to be collected by a Question.

SelectDimension

SeriesStatement

Represents detailed information about a series of statistical activities.

Software

Describes information about a software application.

SourceCode

Represents source code for a particular language.

SourceCodeCollection

Represents a collection of SourceCode objects.

SpatialCoverage

Represents a description of geographic coverage.

StandardWeightCoding

Represents a standard weighting factor used by all or a group of variables within the data set.

StatementActivity

Represents a statement that occurs in a data collection instrument.

StatementValue

serialization of the right hand operand value

StatisticalClassification

A Statistical Classification is a set of categories which may be assigned to one or more variables registered in statistical surveys or administrative files, and used in the production and dissemination of statistics. The categories at each level of the classification structure must be mutually exclusive and jointly exhaustive of all objects/units in the population of interest. The categories are defined with reference to one or more characteristics of a particular population of units of observation. A Statistical Classification may have a flat, linear structure or may be hierarchically structured, such that all categories at lower Levels are sub-categories of categories at the next Level up. Categories in Statistical Classifications are represented in the information model as Classification Items.

StudyBase

Provides a base class with common informatino for Group and StudyUnit.

StudyUnit

Represents a description of a research study or other statistical activity.

SubGroup

Describes a sub grouping in a series of research studies or other statistical activities.

SummaryStatistic

Represents a summary statistic that describes a variable.

Telephone

Represents a telephone number.

TemporalCoverage

Provides information to describe the time period covered by a study.

TextDomain

Represents text data to be collected by a Question.

TopicalCoverage

Provides information to describe the topical coverage of a study.

UnitType

A Unit Type is a class of objects of interest. A Unit Type is used to describe a class or group of Units based on a single characteristic with no specification of time and geography. For example, the Unit Type of “Person” groups together a set of Units based on the characteristic that they are “Persons”. It concerns not only Unit Types used in dissemination, but anywhere in the statistical process. For example, using administrative data might involve the use of a fiscal unit. “Object class (ISO 11179)” is a synonym of UnitType. [GSIM 1.2]