Describes action taken to minimize loss of data from the collection event.

Describes the aggregation method and the variables used in the aggregation process.

Identifies the independent and dependent variables used in the aggregation process.

Reference to an existing AggregationVariables using the Reference structure.

Information on the command used to generate an alternative means of determining sequence changes.

Reference to an existing AssignedVariable using the Reference structure.

An image associated with the Instruction, located at the provided URN or URL.

Allows attachment of a secondary response domain to a specific item within another response domain used in the question.

A response domain capturing a category (without an attached code) response for a question item.

Defines one or more cells by defining the applicable values of each dimension as "all values", a "specific value" or a range.

Provide a label to be included inside of a grid cell and defines the cell or cells that contain it.

A generic operation description used to describe a cleaning operation.

A response domain capturing a coded response (where both codes and their related category value are displayed) for a question item.

Information on a specific data collection event

Describes the situation in which the data collection event takes place.

A form of control construct providing a code and assigning a variable to hold value of the code as used for computation in control construct flow.

A substitution for TextContent, contains command code or source of the dynamic (changing) text.

Information on the command used for determining if the conditions have been met to continue the given activity.

Name of the Construct using the DDI Name structure.

Describes the ordering of Constructs when not otherwise indicated.

Provides the basic, extensible structure for control elements used in describing flow logic within the instrument.

Contains a group of ControlConstructs.

Name of the ControlConstructGroup using the DDI Name structure.

Reference to an existing ControlConstructGroup using the Reference structure.

A reference to a control construct of any type with the ability to bind the InParameter or OutParameter of the ControlConstruct to external information as needed.

A set of control constructs maintained by an agency and used in the instrument or computational instruction.

Name of the Control construct Scheme using the DDI Name structure.

A generic operation description used to describe a control operation.

Describes the result of data appraisal activities as a response rate and sampling error.

A maintainable module containing information on activities related to data collection/capture and the processing required for the creation a data product.

Time period of this role.

Documents the intended frequency of data collection.

A basic structure for describing the methodology used for collecting data.

Name of the Data Collection Module using the DDI Name structure.

Specification of the software used by the proprietary system.

Reference to an existing Organization using the Reference structure.

Describes the source of the data.

A response domain capturing a date or time response for a question item.

A response domain capturing the date time response for a question item.

Reference to an existing Variable using the Reference structure.

Describes any deviations from the planned sample design.

Describes the ordering of dimensions when not otherwise indicated.

Display text which supports the use of dynamic content.

A response domain capturing a distribution response for a question.

Identifies the value of the ResponseDomain to which the new ResponseDomain is attached by specifying its attachmentBase number of the target ResponseDomain in the attribute attachmentDomain.

Reference to an existing Construct using the Reference structure.

Use for multiple branching from a single point in the flow logic represented by the flow logic If, Then, ElseIf, Then, etc.

Information on the command used to generate the dynamic portion of a text field.

Description and link to the External Aid using the DDI Other Material structure.

Description and link to the External Information using the DDI Other Material structure.

A reference to an external representation of the data collection instrument, such as an image of a questionnaire or programming script.

Specification of an external interviewer instruction not structured in DDI.

Processing instructions that pertain to data collection or data processing overall such as handling of non-response to questions, imputation practices, suppression rules, etc.

Reference to an existing GeneralInstruction using the Reference structure.

Processing instructions for recodes, derivations from multiple question or variable sources, and derivations based on external sources.

Reference to an existing GenerationInstruction using the Reference structure.

A response domain capturing a geographic coordinate reading as a response for a question item.

A response domain capturing the name or code of a Geographic Location as a response for a question item.

A response domain capturing a geographic structure code as a response for a question item.

Identifies the cell or cells in a grid to which the item is attached by a reference to a specific cell coordinate in a grid or by identifying a range of values along a dimension.

Describes each dimension of the grid including dimension rank (for the purpose of identifying a cell address), a text for the dimension, and optional labels and codes used as column and row stubs.

Designates the response domain and the cells using the specified response domain within a QuestionGrid.

Information on the command used to determine whether the "If" condition is met.

A member of the ControlConstruct substitution group.

Reference to an existing Variable using the Reference structure.

Information on the command used to set the initial value for the process.

Provides the content and description of a single instruction.

Allows attachment of an instruction to a specific item in a question structure.

Contains a group of Instructions.

Name of the InstructionGroup using the DDI Name structure.

Reference to an existing InstructionGroup using the Reference structure.

Name of the Instruction using the DDI Name structure.

Reference to an individual instruction.

The content of the Instruction text provided using DynamicText.

Defines the type of instrument used for data collection or capture.

Describes a group of instruments for administrative or conceptual purposes, which may be hierarchical.

Name of the Instrument Group using the DDI Name structure.

Reference to an existing InstrumentGroup using the Reference structure.

Name of the Instrument using the DDI Name structure.

Reference to an existing Instrument using the Reference structure.

Describes a set of instruments maintained by an agency.

Name of the Instrument Scheme using the DDI Name structure.

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

Reference to an interviewer instruction expressed as DDI XML plus a flag to designate whether the instruction should always be displayed.

A set of interviewer instructions to be displayed within the instrument, such as definitions, and explanations of terminology and questions.

Name of the Interviewer Instruction Scheme using the DDI Name structure.

Describes the types of sequences that can be used for a set of items.

A substitution for TextContent containing the static (unchanging) text.

A response domain capturing a location response (mark on an image, recording, or object) for a question.

A control construct describing an action which loops until a limiting condition is met.

Reference to an existing Variable using the Reference structure.

Information on the command used to determine whether the "LoopWhile" condition is met.

Metadata regarding the methodologies used concerning data collection, determining the timing and repetition patterns for data collection, and sampling procedures.

Reference to metadata regarding the methodology of the data collection process including, determining repetition patterns, sampling, collection modes, etc.

A response domain capturing the missing value response for a question item.

Describes the mode of collection, i.e., paper questionnaire, observation, web delivered questionnaire, computer assisted interview, automated data harvesting, etc.

Defines the cells within the grid that contain the specified content.

A response domain capturing a nominal (check off) response for a question grid response.

The number of responses within the specified sample.

A response domain capturing a numeric response (the intent is to analyze the response as a number) for a question item

A response domain capturing the numeric response for a question item.

A citation or URI for the source of the data.

A URN or URL for the data source.

Other Appraisal Process provided using a StructuredString to support multiple language versions of the same content as well as optional formatting of the content.

Reference to an existing Generation or General Instruction using the Reference structure.

ProcessingEvent can contain a number of operations of different types to express a range of events that occur together.

Describes a group of processing events for administrative or conceptual purposes, which may be hierarchical.

Name of the Processing Event Group using the DDI Name structure.

Reference to an existing ProcessingEventGroup using the Reference structure.

Reference to an existing ProcessingEvent using the Reference structure.

A set of processing events maintained by an agency, and used in the processing data during development, cleaning, converting to variables, aggregating, and comparing.

Name of the Processing Event Scheme using the DDI Name structure.

Reference to a ProcessingEventScheme using SchemeReference which allows for the specification of objects to exclude.

Describes a group of processing instructions for administrative or conceptual purposes, which may be hierarchical.

Name of the Processing Instruction Group using the DDI Name structure.

Reference to an existing ProcessingInstructionGroup using the Reference structure.

A set of Processing Instructions (General and Generation Instructions) maintained by an agency.

Name of the Processing Instruction using the DDI Name structure.

Reference to a ProcessingInstructionScheme using SchemeReference which allows for the specification of objects to exclude.

A QuestionBlock is a specific structure used in educational and other types of testing where an object (Stimulus Material) is provided and a set of questions are asked regarding the object.

Intent of the Question Block provided using a StructuredString to support multiple language versions of the same content as well as optional formatting of the content.

Name of the Question Block using the DDI Name structure.

Reference to an existing QuestionBlock using the Reference structure.

A construct which ties question content to the programmatic logic of the control constructs.

Structures the QuestionGrid as an NCube-like structure providing dimension information, labeling options, and response domains attached to one or more cells within the grid.

Name of the Question Grid using the DDI Name structure.

Reference to an existing QuestionGrid using the Reference structure.

Contains a group of Questions, which may be ordered or hierarchical.

Name of the Question Group using the DDI Name structure.

Reference to an existing QuestionGroup using the Reference structure.

Intent of the Question provided using a StructuredString to support multiple language versions of the same content as well as optional formatting of the content.

Structure a single Question which may contain one or more response domains (i.e., a list of valid category responses where if "Other" is indicated a text response can be used to specify the intent of "Other").

Name of the Question Item using the DDI Name structure.

Reference to an existing QuestionItem using the Reference structure.

Contains a set of QuestionItems, QuestionGrids, QuestionBlocks, and QuestionGroups.

Name of the Question Scheme using the DDI Name structure.

Describes the ordering of questions when not otherwise indicated.

Question text which supports the use of dynamic content.

A response domain capturing a ranking response which supports a "ranking" of categories.

A ControlConstruct that specifies a ControlConstruct to be repeated until a specified condition is met.

A ControlConstruct that specifies a ControlConstruct to be repeated while a specified condition is met.

An abstract element serving as the head of a substitution group.

A structure that provides both the response domain and information on how it should be attached, or related, to other specified response domains in the question.

An abstract base for the substitution group ResponseDomainReference.

A specific rate of response and/or a description of the rate of response for a specific processing event that includes data appraisal.

Describes the ordering of response options when not otherwise indicated.

Response text which supports the use of dynamic content.

Provides a means of bundling multiple language versions of the same intended dynamic text together.

A brief textual description or classification of the intended response unit/respondent.

A roster is an unlabeled list of numbered rows or columns depending upon orientation.

The size of the sample from whom data was requested.

Sampling Error provided using a StructuredString to support multiple language versions of the same content as well as optional formatting of the content.

Describes the type of sample, sample design and provides details on drawing the sample.

A response domain capturing a scale response which describes a 1..n dimensional scale of various display types for a question.

A response domain capturing the scale response for a question item.

For each dimension in the grid define the applicable values as "all values", a "specific value" or a range.

A ControlConstruct that provides a sequence order for operations expressed as control constructs.

Characteristic provided using a StructuredString to support multiple language versions of the same content as well as optional formatting of the content.

Source Description provided using a StructuredString to support multiple language versions of the same content as well as optional formatting of the content.

Reference to a question used in the derivation or coding instruction.

A brief textual description of the type of data source.

Reference to a variable used in the derivation or coding instruction.ComputationItem, TypeOfObject should be set to Variable.

The SpecificCellCoordinate expressed as an xs:string.

The specific rate of response expressed as a percent.

Provides an identified value for a standard weight expressed as an xs:float.

Provides the standard weight used for weighted analysis of data expressed as an xs:float.

A textual statement used in the Instrument.

Information on the command used to set the incremental or step value for the process.

Description and link to the StimulusMaterial using the DDI Other Material structure.

Contains a mixture of response domains for the grid cells.

A structure to allow for mixing multiple response domains in a single question.

The static portion of the text expressed as a StructuredString with the ability to preserve whitespace if critical to the understanding of the content.

Abstract type existing as the head of a substitution group.

A response domain capturing a textual response.

A response domain capturing the text response for a question item.

Reference to an existing Construct using the Reference structure.

Describes the time method or time dimension of the data collection.

A brief textual description or classification of the actions taken to minimum data loss.